Himoinsa cem7 коды ошибок

Table of Contents:

INSTRUCTION MANUAL
PROFESSIONAL
DIGITAL CONTROL UNIT CEM7




GENERATOR HS355  |  PAGE 2
CONTENTS
3  1. Introduction
6  2. Front of the display module
10  3. Operating modes
12  4. Operation
22  5. CEM7 control unit inputs and outputs
31  6. CEM7 control unit alarms
47  7. Maintenance
51  8. Options (expansions)
56  9. Appendix I: parameters table
66  10. Appendix II. CEM7 control unit screens
79  11. Appendix III: dimensions, wiring and mechanical parts
92  12. Appendix IV: CAN communications 
95  13. Appendix V: calibration of the control unit
97  14. Appendix VI: expanding inputs
97  15. Appendix VII: communications failure




INTRODUCTION  |  PAGE 3
1. INTRODUCTION
The CEM7 control unit is a generator set power supervision and control device. 
The control unit consists of 2 different modules:
 • Display module. The display module is responsible for carrying out 
the information tasks regarding the status of the device and allows 
actions to be performed by the user; through the display module 
the user is able to control the control unit, as well as program and 
congure the functions. Through the display module, access is given 
to a record of the last 10 errors registered by the control unit. 
 • Measurements module. The measurements module is responsible 
for performing the tasks of monitoring and control of the control unit. 
This module is located in the rear panel to reduce wiring and increase 
the control unit's immunity against electromagnetic noise. All the 
signal, sensor and actuators are connected to the measurements 
module. (See illustrations in Appendix III)
NOTE 
A Timer module can be added as an option to the measurements module and 
allows the functions of start up, blocking and scheduled maintenance to be 
performed. Also, the Timer module allows the capacity of the error records to be 
increased.




INTRODUCTION  |  PAGE 4
3. Congurable inputs; the measurements plate has 5 inputs that can be 
programmed to perform the following functions:
 • Tariff change warning
 • Tariff change (CEM7 + CEA7CC2)
 • Start up disabling
 • External start
 • Test (CEM7 + CEA7CC2)
 • Forced operation
 • Programmable alarms
 • Genset contactor conrmation
 • Parameter set selection
4. Engine statistics:
 • Operating hours
 • Number of starts
5. The measurements module commands the following engine functions:
 • Preheating
 • Stopping
 • Starting
 • Heating resistor
 • Fuel transfer pump
 • Battery charging alternator excitation
The measurements module has outputs which allow the status of the control unit 
to be monitored:
 • Motor started
 • Control unit alarm
 • 3 programmable outputs that monitor the status of the control unit 
alarms or the engine status inputs
The measurements module commands relay outputs for activation of the genset 
contactor and the electronic protection that trips the genset's general circuit 
breaker.
The connection of the measurements module and display module is performed 
via a CAN communications bus, enabling the interconnection between additional 
modules which ensures the scalability of the control unit.
The following additional modules can be added as options via the CAN bus:
1.1 MEASUREMENTS MODULE
The measurements module provides the following electrical signal characteristics, 
both those generated and those from the network itself:
 • Phase-neutral voltage
 • Phase-to-phase voltage
 • Current phase
 • Frequency
 • Active, apparent and reactive power
 • Power factor and cosine of FI
 • Instant energy (kWh) and accumulated power (day, month, year) with 
the timer option
 • THD (total harmonic distortion) of voltages and currents
 • Calculation of harmonics up to order 20
The measurements module provides the following engine characteristics:
1. Engine alarm inputs:
 • Fuel reserve
 • Oil pressure
 • Water temperature
 • Water level
 • Emergency stop (mushroom head stop button)
2. Analogue inputs of the engine:
 • Fuel level
 • Pressure
 • Temperature
 • Congurable input (Oil temperature)
 • Charge-battery alternator voltage




INTRODUCTION  |  PAGE 5
 • Timer device
 • Telesignal device
 • CCJ1939 device
 • Repetitive display
 • Telecontrol device
 • Announcement panel device
 • CAN/USB
 • CAN/232 + MODEM LINE
 • CAN/232 + MODEM GSM
 • CAN/232 + MODEM GSM/GPS POSITIONING
 • CAN/232 + MODEM GPRS HG FLEET MANAGER
 • CAN/232 + MODEM GPRS/GPS HG FLEET MANAGER
 • CAN/485 (MODBus)
 • CAN/LAN
 • CAN/LAN (MODBUS IP)
 • CAN/LAN HG FLEET MANAGER
 • Second Zero Suppressor
 • PT100 temperature probes expansion
 • ATS panel with CEC7 control unit.
 • Precision gauge




FRONT OF THE DISPLAY MODULE  |  PAGE 6
2. FRONT OF THE DISPLAY MODULE
The display module has a backlit display and various LEDs for monitoring the 
status of the control unit. It also has keys that allow the user to control and 
program the control unit.
Fig.1
CEM7 display module
Fig.2
CEM7P display module




FRONT OF THE DISPLAY MODULE  |  PAGE 7
2.1.2 CONTROL UNIT COMMAND BUTTONS 
Engine start button (only in manual mode)
Controls the start up with a single push.
Lit LED: Engine started.
Engine stop button (only in manual mode) 
The rst press stops the engine following a cooling cycle. The 
second press stops the engine immediately.
Lit LED: Engine stopping (with or without cooling)
Alarms reset button. Allows acoustic signals to be eliminated 
and the user to report the alarms.
LED flashing: Pending notication alarms.
Lit LED: Alarms active.
Fuel transfer pump button. 
In manual mode, this button activates the fuel transfer pump 
if the fuel level is below the programmed limit.
Lit LED: Fuel transfer pump active.
2.1.3 DISPLAY BUTTONS
Confirm (V). Enter the menus and conrm the data 
entered.
Cancel (X). Leave the menus and cancel the data entered.
Up (+). Advance through the selection on display screens, 
the selection in maintenance menus and increase the 
programming settings.
Down (-). Go back through the selection on display screens, 
the selection in maintenance menus and decrease the 
programming settings.
1. Backlit display 4 lines by 20 digits.
NOTE 
The display goes into low power mode (backlight off) after 10 minutes have 
passed without any keystroke.
2. Control unit buttons
 • Buttons for control unit operating mode
 • Control unit command buttons
 • Display buttons
 • Genset contactor activation button (only CEM7P module)
3. Status LEDs
 • ENGINE status LEDs
 • ALARMS LEDs
 • CONTACTORS status LEDs
2.1 CONTROL UNIT BUTTONS
2.1.1 BUTTONS FOR CONTROL UNIT OPERATING MODES
Automatic mode: The control unit 
monitors the status of the genset and 
manages its operation and the 
programmable inputs.
Manual mode: The control unit is 
commanded by the user.
Lit LED: Automatic 
mode active
LED flashing: 
Automatic mode 
blocked
LED off: Manual 
mode active




FRONT OF THE DISPLAY MODULE  |  PAGE 8
2.2.2 ALARMS LEDS
Fuel reserve
Lit: Analogue sensor alarm
Flashing: Digital sensor alarm
Off: Without alarm
Battery level
High temperature
Engine start up failure
Overspeeding
Low oil pressure
Auxiliary 1 (freely 
programmable)
Auxiliary 2 (freely 
programmable)
NOTE 
For more details see the Alarms section
2.2.3 CONTACTORS STATUS LEDS (CEM7 + CEA7CC2).
These LEDs only appear active when the switching control unit is connected. 
Start up option due to Network Voltage Failure (CEM7 + CEA7CC2)
The M and G symbols on the front of the control unit only appear activated when 
the switching control unit is connected.
Network contactor status
Lit: Contactor active
Flashing: Contactor in the 
connection/disconnection 
phase.
Off: Contactor disconnected.
Genset contactor status
2.1.4 CONTACTOR BUTTONS (ONLY CEM7P MODULE)
Genset contactor. Enable/disable genset contactor (manual 
mode only).
2.2 STATUS LEDS
2.2.1 ENGINE STATUS LEDS
Motor started
Lit: Engine running detected  
Off: Motor stopped
Preheating
Lit: Engine preheating activated 
Off: Engine preheating deactivated
Start engine
Lit: Engine started 
Off: Engine start deactivated
Alternator status
battery charging
Lit: With engine running, voltage in the 
battery charging alternator is detected 
Off: Stopped engine or engine running 
without voltage in the battery charging 
alternator




FRONT OF THE DISPLAY MODULE  |  PAGE 9
2.3 PASSWORDS
The CEM7 control unit has 2 levels of 4-digit password to protect against 
unauthorized access. The different levels of access are as follows:
 • User (default password: 1111). User level access allows the operator 
to access the main menu of the CEM7 control unit.
 • Maintenance (default password: 1911). Maintenance level access 
allows the operator to access the Parameters programming option 
from the main menu.
The CEM7 control unit's passwords are customizable by the user from the main 
menu. A user can congure both passwords for their access level and lower-level 
passwords.
NOTE 
To enter a password see Appendix II: password entry




OPERATING MODES  |  PAGE 10
3. OPERATING MODES
3.1 MANUAL MODE
In manual mode, the control unit is commanded by the user via the front panel of 
the display module. The user can start and stop the engine by pressing the 
START and STOP keys respectively. 
Pressing the START key initiates the engine starting procedure (without 
deactivating the network contactor CEM7 + CEA7CC2). Pressing the STOP key 
initiates the engine stopping procedure with cooling; a second press of the STOP 
key causes the engine to stop immediately without waiting for the cooling time.
x 1 click  
WITH cooling
x 2 (double click) 
WITHOUT cooling
NOTE
In manual mode, the control unit's protection devices remain active, being able 
to produce alarms that cause the motor to stop.  
In manual mode, the control unit does not take into consideration the start 
conditions (programmed, by external signal) that can be programmed.
Activation of the genset contactor on the CEM7P display module is performed by 
pressing the GENSET key. 




OPERATING MODES  |  PAGE 11
3.3 MODE LOCKING FUNCTION
Pressing the Auto or Man keys for 5 seconds activates the locking of the mode. 
This control unit state is indicated by the ashing of the mode key currently 
active. To deactivate the mode lock and allow normal operation of the control 
unit, press the key associated to the active mode for 5 seconds.
5 ’’ Locked 5 ’’ Unlocked
In order to achieve activation of the genset contactor, the engine has to be 
running and provide a stabilised electrical signal.
3.2 AUTOMATIC MODE
In automatic mode   supervision of the installation is managed by the control 
unit. Under certain conditions which can be programmed, the control unit starts 
the genset to power the installation. 
Programmable conditions for genset starting and activation of the genset 
contactor include:
 • External start (Settings table, parameter 10) 
 • Start programmed by schedule
 • Forced operation signal (Settings table, parameter 12 and 
Regulations table, parameter 25)
 • Starting via the switching panel (CEA7CC2)
Programmable conditions for genset starting without activation of the genset 
contactor include:
 • Tariff warning (Settings table, parameter 7)
 • Engine test (Settings table, parameter 11)
Also in automatic mode it is possible to manage start ups by using external 
devices (PC, modem, display modules or switching control units).




OPERATION  |  PAGE 12
4. OPERATION
4.1 STARTING THE ENGINE
Under the conditions for activating the control unit, proceed to perform the 
following engine start procedure:
4.1.1 DIESEL ENGINE
1. Start delay. Once activation conditions are detected, it is possible to program 
a time delay (Times table, parameter 3) before continuing the engine start up 
procedure only in automatic (CEM7 + CEA7CC2 or CEM7 + AE)
2. Preheating of the motor (PR). The control unit activates preheating output 
(PR) for the programmed time (Times table, parameter 4). The control unit allows 
programming of a temperature threshold (Thresholds table, parameter 48) of the 
coolant sensor that interrupts the preheating process, before proceeding with 
the engine start up.
3. Enabling the starting of the motor (positive contact activation). Enabling the 
starting of the motor (positive contact activation) is performed via the 
measurements module PC output. The output supports a Stop by De-energisation 
conguration (output activation during engine operation) or Stop by Excitation 
(engine stop pulse -Table times, - parameter 12). The operating mode of the 
enabled output can be set (Times table, parameter 18). 




OPERATION  |  PAGE 13
4.1.2 GAS ENGINE
1. Checking the engine gas train (PR). The process of checking the gas train 
begins with the activation of the PR output and lasts for a programmable 
maximum time (Times table, parameter 4). If the control unit has a programmable 
input (Settings table, parameter 25) assigned to the verication of the gas train, 
the process checking the gas train shall end when activation of the gas train 
verication input is detected; if gas train activation time ends without having 
detected gas train verication, the control unit shall attempt the start again. If 
the control unit has no input assigned to gas train verication (Settings table, 
parameter 25, value 0), the control unit shall carry out the engine start after the 
time set for checking the gas train. The gas train output PR will remain active 
from the engine's start and running process until the engine stop is carried out.
2. Starting the motor (ARR). For a maximum time (Times table, parameter 5), 
the start output of the measurements module is activated while waiting to detect 
at least one of the programmed start conditions (Regulations table, parameters 
19 to 22).
3. Gas Ignition (PC). Some time after (Times table, parameter 30) activating the 
start signal, the PC output is activated to enable engine ignition once the residual 
gas has been purged.
4. Gas valve. Some time after (Times table, parameter 31) activating the Gas 
Ignition signal, the output congured as gas valve is activated (Settings table, 
parameters 1 to 3, value 25).
5. If during the set time no motor starting is detected, the control unit waits for a 
period of time (Times table, parameter 2) before retrying the start. Once a certain 
number of starts has been exceeded without detecting any start condition (Times 
table, parameter 1), the control unit activates the Starting Failure alarm.
6. During motor starting, the excitation of the battery charging alternator is 
carried out through the D+ output for a period of time (Times table, parameter 8). 
Once the excitation of the alternator has been completed, the measurement 
module monitors the correct functioning of the battery charging alternator. In the 
event a battery charging alternator failure is detected, the Alternator Failure 
alarm is activated (Alarms table, parameter 10).
4. Starting the motor (ARR). For a maximum time (Times table, parameter 5), 
the start output of the measurements module is activated while waiting to detect 
at least one of the programmed start conditions. The possible engine starting 
conditions are:
 • Generator voltage (Regulations table, parameter 19). The motor is 
considered started when a certain generator voltage is exceeded 
(Threshold table, parameter 20).
 • Alternator voltage (Regulations table, parameter 20). The motor is 
considered started when a certain battery charging alternator voltage 
is exceeded (Threshold table, parameter 21).
 • Pickup frequency (Regulations table, parameter 21). The motor is 
considered started when a certain pickup frequency is exceeded 
(Threshold table, parameter 22). To activate the pickup calculation 
via the engine ring gear, it is necessary to enter the number of teeth 
on the engine's ywheel ring gear (Threshold table, parameter 24); 
if the number of teeth for the ywheel ring gear is zero, the pickup 
frequency is calculated via the generator frequency according to the 
ratio 50 Hz / 1500 rpm, 50 Hz / 3000 rpm or 60 Hz /1800 rpm 
(Regulations table, parameter 26).
 • Low Oil Pressure Signal (Regulations table, parameter 22). Due to 
its characteristics, it is not advisable to use the low oil pressure 
signal to detect if the engine is running, but its use is recommended 
as protection against a restart, as the engine is already running. 
Exceptions to this engine start detection are SCANIA engines and 
sensors that have their own power source.




PRACTICAL EXAMPLE OF A START OPERATION
NOTE
Before starting the start cycle it is advisable to ensure the genset's main circuit 
breaker is in the off position (OFF).
OPERATION
By pressing the START button the start cycle is initiated and is indicated by the 
START button's LED switching on. At the same time if the motor has a preheating 
plug the PR output is activated, with the corresponding LED switching on ( ), 
for the programmed time. (1)
Fig.1
Once this time has elapsed the PR output is deactivated, and the corresponding 
LED turns off ( ) and immediately the positive contact of the PC output is 
activated and 0.5 seconds later the ARR output with the switching on of the LED 
( ), this output remains activated until any engine running condition is 
detected. (2)
7. Generator stabilisation. Once any start condition is detected, the control unit 
waits for a xed time for stabilization of the generator signal before monitoring 
the quality of the generator signal.
8. Nominal condition. After achieving engine stabilisation, verication of the 
generator signal is performed. In this state, the quality of the signal produced by 
the genset is evaluated (voltage levels, frequency,...).
OPERATION  |  PAGE 14




Fig.2
Once it has been detected that the engine is running the LED switches on ( ), 
this indicates the end of the start cycle and the START button turns off. (3)
Fig.3
The LED corresponding to the battery charging alternator voltage ( ) switches 
on when the voltage provided by the alternator exceeds the voltage threshold set 
by default. (4)
Fig.4
If during the start cycle, the engine started condition is not detected after 5 
seconds, the ARR output deactivates and the corresponding LED turns off 
( ). Subsequently the control unit automatically attempts a new start, repeating 
a new cycle without the need to press START (4 cycles by default). After 
exhausting the attempts to start the engine without success, the control unit 
display shows the alarm (START FAILURE). (5)
To interrupt the start cycle just press the STOP button.
x4
Fig.5
OPERATION  |  PAGE 15




OPERATION  |  PAGE 16
NOTE
The display shows the engine status screen, where the engine status is displayed 
during the start up operation. This sequence is:  
Genset: Stopped 
Genset: Starting 
Genset: Started 
Genset: Stabilised 
Genset: Charging
NOTE
The start an automatic system using a timer, external signal, etc. is carried out 
following the same process as when starting manually.
4.2 ENGINE STOP
The engine stopping process in automatic mode is carried out as follows:
4.2.1 DIESEL ENGINE
1. Cooling the motor. Once free of charging, the engine will continue running for 
a cooling time (Times table, parameter 11). In certain situations, it is possible to 
set the alarms (Alarms table, parameters 3, 6, 9...) of the control unit to perform 
a stop without engine cooling
2. Engine stop. After the engine cooling time has elapsed, the PC output of the 
measurements module is enabled or disabled according to the programmed 
conguration (Regulations table, parameter 18). As an engine stop condition it is 
possible to select:
 • Generator voltage (Regulations table, parameter 19). The engine is 
considered stopped when the generator voltage is below the start up 
threshold (Threshold table, parameter 20).
 • Alternator voltage (Regulations table, parameter 20). The engine is 
considered stopped when the battery charging alternator voltage is 
below the start up threshold (Threshold table, parameter 21).
 • Pickup frequency (Regulations table, parameter 21). The engine is 
considered stopped when the pickup frequency is below the start 
up threshold (Threshold table, parameter 22). To activate the pickup 
calculation via the engine ring gear, it is necessary to enter the 
number of teeth on the engine's ywheel ring gear (Threshold table, 
parameter 24); if the number of teeth for the ywheel ring gear is 
zero, the pickup frequency is calculated via the generator frequency 
according to the ratio 50 Hz / 1500 rpm, 50 Hz / 3000 rpm or 60 Hz 
/1800 rpm (Regulations table, parameter 26).
 • Low Oil Pressure Signal (Regulations table, parameter 22). The 
low oil pressure condition is used for detecting a stop, by which the 
engine is considered stopped when it is detected that the sensor is 
closed. Exceptions to this engine stop detection are SCANIA engines 
and sensors that have their own power source.
4.2.2 GAS ENGINE
1. Checking the engine gas train (PR) and gas valve. The control unit 
deactivates the gas supply outputs to the engine.
2. Gas Ignition (PC). Some time after (Times table, parameter 32) closing the 
gas supply, the Gas Ignition output is deactivated to stop the engine. If the 
engine stop is triggered by an emergency stop alarm, the Gas Ignition output is 
deactivated simultaneously to cutting the gas supply.
To conrm the engine has stopped, all the programmed stop conditions must be 
detected for a set period of time (Alarms table, parameter 71). If after 90 
seconds an engine running condition continues to be detected, the Stop Failure 
alarm is triggered.




PRACTICAL EXAMPLE OF A STOP OPERATION
NOTE
Before starting the stop cycle it is advisable to ensure the genset's main circuit 
breaker is in the off position (OFF).
The genset stop can be performed in various ways:
1. Manual: Pressing the STOP button once. To perform a stop with cooling cycle.
2. Manual: Pressing the STOP button twice. To perform a stop without cooling 
cycle.
3. Turning the panel's activation key to the “O” position. To perform a stop 
without cooling cycle.
4. Automatic: After cancelling the order which leads to the automatic start and 
in this way performing a stop with cooling.
Sequence: We press the STOP button once and begin the stop cycle with engine 
cooling. This is indicated with the STOP1 button lighting up.
Fig.1
After concluding the cooling time (120 seconds by default), the PC output is 
disabled or enabled according to the type of engine to carry out the stop, the 
STOP button and the LED ( ) for the started engine switch off (2).
Fig.2
If after a period of time any engine running condition is detected, the control unit 
shows on the display the STOP FAILURE alarm and the LED of the STOP button 
remains lit (3).
Fig.3
The LED corresponding to the battery charging alternator voltage ( ) switches 
off when the voltage provided by the alternator falls below the programmed 
voltage threshold (4).
OPERATION  |  PAGE 17




OPERATION  |  PAGE 18
4.3 FUEL TRANSFER PUMP
It is possible to activate the fuel transfer pump of the CEM7 control unit by 
associating its operation with the BT relay of the measurements module 
(Regulations table, parameter 4). Once the fuel transfer pump option is enabled, 
the operating mode is then set (Regulations table, parameter 1):
1. Inhibited mode. The fuel transfer pump is not managed.
2. Manual mode. The fuel transfer pump is activated by pressing the DIESEL 
TRANSF key provided that the fuel level is below the maximum deactivation 
threshold (Threshold table, parameter 19)
3. Automatic mode. Managing the fuel transfer pump works by monitoring the 
minimum activation threshold (Threshold table, parameter 18) below which the 
BT relay is connected and a maximum deactivation threshold (Threshold table, 
parameter 19) above which the BT relay disconnects.
4. Combined mode. The combined mode of the fuel transfer pump manages the 
fuel transfer pump according to the Automatic mode, but also allows activation of 
the BT relay by pressing the diesel Transf. key. Manual activation of the BT relay 
is limited by the maximum deactivation threshold (Threshold table, parameter 
19). The combined mode of the fuel transfer pump is available for control units 
with rmware versions 2.56 and above. 
5. Control unit mode. Managing the fuel transfer pump is performed as follows:
 • When the control unit is in automatic mode or test mode, the 
operation of the fuel transfer pump is managed in automatic mode.
 • When the control unit is in manual mode, the operation of the fuel 
transfer pump is managed manually.
 • When the control unit is in locked mode, the operation of the fuel 
transfer pump is inhibited (CEM7 + CEA7CC2).
The control unit mode of the fuel transfer pump is available for control units with 
rmware versions 2.54 and below.
NOTE
The display shows the engine status screen, where the engine status is displayed 
during the stop operation. This sequence is: 
Genset: Stabilised 
Genset: Cooling 
Genset: Stopping 
Genset: Stopped.




OPERATION  |  PAGE 19
4.5 BATTERY CHARGING ALTERNATOR
The battery charging alternator is connected to the CEM7 control unit via the 
digital output D + and the DI analogue input of the measurements module.
The CEM7 control unit can be congured to produce an Alternator Voltage alarm 
(Alarms table, parameters 10 to 12) if a low voltage supplied by the battery 
charging alternator is detected through the DI analogue input of the 
measurements module.
It is possible to select (Regulations table, parameter 3) between 2 modes of 
operation of the battery charging alternator:
4.5.1 ALTERNATOR MODE
Operation of the CEM7 control unit's battery charging alternator congured to 
alternator mode, excites the alternator via a pulse with a congurable duration 
(Times table, parameter 8) during engine start process through the D+ output of 
the measurements module. At the end of the pulse, the control unit tests the 
voltage generated by the battery charging alternator.
The voltage generated by the battery charging alternator can be used as an 
engine running condition (Regulations table, parameter 20). For this purpose, the 
control unit waits to measure voltage, via the DI analogue input, which is above 
an alternator voltage detection threshold (Threshold table, parameter 21).
The CEM7 control unit can be congured to produce an Alternator Voltage alarm 
(Alarms table, parameters 10 to 12) if a low voltage supplied by the battery 
charging alternator is detected through the DI analogue input of the 
measurements module if it is set to alternator mode.
Calibration of the gauge: For correct fuel level measurements (required for 
managing the fuel transfer pump and fuel level alarm) a calibration of the tank 
gauge should be performed. This requires access to the minimum and maximum 
gauge level parameters (Measurements table, parameters 12 and 13). To adjust 
the minimum level of fuel in the tank validation of parameter 12 of the 
Measurements table should be performed with the gauge in the minimum 
position. To adjust the maximum level of fuel in the tank validation of parameter 
13 of the Measurements table should be performed with the gauge in the 
maximum position.
In the event the gauge response is not linear, it is possible to program a gauge 
response curve with up to 8 points from the option MenuParametersSensors.
4.4 HEATING
Management of engine heating allows 2 modes of activation:
 • Assigning the heating function to BT relay of the measurements 
module (Regulations table, parameter 4).
 • Assigning the heating function to one of the 3 programmable outputs 
of the measurements module (Settings table, parameters 1-3) 
provided that the BT relay of the measurements module is assigned 
to the management of the fuel transfer pump (Regulations table, 
parameter 4).
Management of engine heating provides the following function:
 • Below a certain engine temperature threshold (Threshold table, 
parameter 29), the heating resistor is activated.
 • Below a certain engine temperature threshold (Threshold table, 
parameter 28), activation of the genset contactor is controlled 
and the Low Engine Temperature Alarm is managed (Alarms table, 
parameters 73 to 74) .
 • Above a certain engine temperature threshold (Threshold table, 
parameter 30), the heating resistor is deactivated.




OPERATION  |  PAGE 20
PROGRAMMING
The generator set will start operating, acquiring this load, when network power 
consumption is detected which more than the limit set by parameter (Threshold 
table, parameter 34). The genset will continue to operate until the genset power 
consumption measured falls below a limit set by parameter (Thresholds table, 
parameter 35). Both with the start and stop of the genset due to load demand, 
the conditions must be validated for a programmable time (Times table, 
parameter 27). The function of start up due to load demand is only enabled in 
Automatic mode of the CEM7 control unit associated to a switching control unit 
CEA7CC2.
NOTE
From the rmware versions of control units: Display 3.20 / Measurements 2.50
4.8 ELECTRONIC PROTECTION
DESCRIPTION
The electronic protection is a feature that permits a control unit output to be 
activated in the event of an overload and short circuit alarm. This function allows 
the genset's main circuit breaker to be disabled via the trip coil. While any of 
these alarms that causes the engine to stop (immediate or cooling) remains 
active or pending notication, the output assigned to electronic protection 
remains active.
PROGRAMMING
The possible outputs that can be assigned to this function are:
 • The SC relay is assigned by default to this function. Furthermore, the 
SC relay is also activated when any alarm is generated which causes 
the engine to stop.
 • The BT relay of the measurements module (Regulations table, 
parameter 4).
 • Any of the programmable outputs of the measurements module 
(Settings table, parameters 1 to 3).
4.5.2 DYNAMO MODE
Operation of the CEM7 control unit's battery charging alternator congured in 
dynamo mode, excites the alternator via a continuous pulse through the D+ 
output of the measurements module while the engine is in start up phase or is 
running.
The control unit congured in dynamo mode cannot use the voltage measured via 
the DI analogue input for detecting an engine running condition.
The CEM7 control unit can be congured to produce an Alternator Voltage alarm 
(Alarms table, parameters 10 to 12) if a low voltage supplied by the battery 
charging alternator is detected through the DI analogue input of the 
measurements module if it is set to alternator mode.
4.6 START/STOP KEY
The start/stop key in the ON position causes power to be supplied to the CEM7 
control unit's electronic devices (measurements module and display module). 
The start/stop key in the OFF position causes a controlled stop if it is running; 
once the engine has stopped, power to the CEM7 control unit is disconnected.
4.7 START DUE TO LOAD DEMAND (ONLY CEA7CC2 EXPANSION)
DESCRIPTION
This function enables automatic start up and activation of generator set charging 
depending on the power consumption of the network.
The start up is performed according to the programming, considering the 
maximum power (Threshold table, parameter 34) the network can consume for a 
period of time (Times table, parameter 27). Once the generator set is started, 
the system changes genset power leaving the network free of load. 
When the load in the installation is below the programmed threshold (Threshold 
table, parameter 35) for deactivation and the programmed period of time (Times 
table, parameter 27) has elapsed, the system returns to charging the installation 
via the network and the genset begins its stopping cycle.




OPERATION  |  PAGE 21
4.10 GENSET IN RESERVE
DESCRIPTION
The genset in reserve function allows the operation of several generator sets in 
the same installation. In order to balance out the hours that all the gensets are 
operational, this function lets the control units specify which generator set should 
start up. They select the genset whose engine has been running for the least 
length of time. This running mode only affects the control unit’s automatic 
working mode. For safety reasons, a generator set can not start-up if any other 
genset is detected to be starting-up with the functionality of the genset in reserve 
enabled.
It is possible to combine the functionality of the genset in reserve with the 
programmed weekly schedules (a timer switch expansion is required) in order to 
establish priorities during specic periods of time. To do this, you have to 
programme time slots in one of the gensets (the master genset) in the facility, 
for:
 • Forced start-up. During this period, the master genset will have 
priority start-up and the facility’s genset in reserve will stop running, 
once the master genset has started running.
 • Start-up inhibited. During this period, the master genset will not have 
priority and therefore, the genset in reserve will start up. Once the 
genset in reserve has started running, the master genset will stop.
PROGRAMMING
Enabling the genset in reserve function is performed by programming a control 
unit parameter (Regulations table, parameter 31, values 4 to 7).
4.9 MOTORPUMP MODE
DESCRIPTION
The motorpump mode congures the CEM 7 control unit to display only engine 
measurements, hiding generator set voltage measurements. This conguration 
must only be used for control units installed in motorpump type systems where 
there is no electrical power generation. They must also disable all alarms 
associated with the electrical measurements of the control unit and the detection 
of the engine start up via generator voltage.
PROGRAMMING:
Enabling the motorpump mode is carried out through programming of a control 
unit parameter (Screen table, parameter 6).




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 22
5. CEM7 CONTROL UNIT INPUTS AND 
OUTPUTS
The CEM7 control unit's digital inputs, both those with a specic purpose as well 
as those which are programmable, have a debounce time associated (Times table, 
parameters 15-24) which requires that the value of the input is stable over a time 
interval. Also, all of the CEM7 control unit's inputs can be congured to be active 
with contact closed to earth or be inactive with contact closed to earth (Regulations 
table parameters 5 to 15).
The status of the CEM7 control unit's inputs and outputs can be monitored from 
the Main menu1.Inputs/Outputs. From that position, a screen displays the 
status of the control unit's digital inputs and outputs:
* INPUTS/OUTPUTS *
IN:
OUT:
IN: Input

OUT: Outputs

Index of the input/output. Ordered from 13 to 1
 
Detection of an active input is indicated by the following characters:
 • IN 1.  R:  Fuel reserve (RC)
 • IN 2.  B:  Low oil pressure (BPA)
 • IN 3.  A:  High temperature (ATA)
 • IN 4.  N:  Water level (NA)
 • IN 5.  X:   Programmable input 4 (default value, external start) 
(AE)
 • IN 6.  I:   Programmable input 5 (default value, disabling start 
up) (IA)
 • IN 7.  P:  Emergency stop (PEM)
 • IN 8.  1:  Programmable input 1
 • IN 9.  2:  Programmable input 2
 • IN 10.  3:  Programmable input 3
 • IN 11.  S:  Mushroom head emergency stop
 • IN 12.  M:  Ignition key (MAN)




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 23
5.1 DIGITAL INPUTS
The CEM7 control unit's measurements module has 5 digital inputs with 
operation that is already preset. 
The xed purpose inputs have the following behaviour:
 
 HIGH TEMPERATURE (ATA)
Digital signal indicating to the control unit that an alarm has been generated due 
to high engine temperature (Table Alarms, parameters 1-3).
 
 LOW OIL PRESSURE (BPA)
Digital signal indicating to the control unit that an alarm has been generated due 
to low oil pressure (Table Alarms, parameters 4 to 6).
 
 WATER LEVEL (NA)
Digital signal indicating to the control unit that an alarm has been generated due 
to low water level (Table Alarms, parameters 16 to 18).
 
 EMERGENCY STOP (PEM + SETA)
Digital signal indicating to the control unit that an immediate stop of the engine 
must be performed without cooling 
 
 FUEL RESERVE (RC)
Digital signal indicating to the control unit that an alarm has been generated due 
to the fuel reserve (Table Alarms, parameters 19 to 21).
Detection of an active output is indicated by the following characters:
 • OUT 1.  A:  Alarm active (AL)
 • OUT 2.  M:  Motor started (MA)
 • OUT 3.  1:  Programmable output 1 (SAL 1)
 • OUT 4.  +:  Battery charging alternator (D+)
 • OUT 5.  2:  Programmable output 2 (SAL 2)
 • OUT 6.  3:  Programmable output 3 (SAL 3)
 • OUT 7.  r:  Network contactor (CRC, CRNA, CRNC)
 • OUT 8.  g:  Genset contactor (CGC, CGNA, CGNC)
 • OUT 9.  B:   Fuel transfer pump/heating resistor  
(BTNA, BTA)
 • OUT 10.  4:  Electronic protection
 • OUT 11.  R:  Preheating/Powered stop (PR)
 • OUT 12.  P:  Unpowered stop/Powered stop (PC)
 • OUT 13.  C:  Enabling control unit 
By pressing the up or down scroll keys it is possible to display the analogue 
inputs.
ANALOGUE INPUTS
The value of the resistance analogue inputs is shown in ohms and the voltage 
analogue inputs in volts. The various inputs displayed are:
 • NC: Fuel level
 • PA: Oil pressure
 • TM: Engine temperature
 • AA: Auxiliary analogue
 • DI: Alternator voltage
 • VB: Battery voltage




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 24
 TEST SIGNAL (TEST)
This function is only managed in automatic mode of the CEM7 control unit with 
the motorised circuit breaker option. 
The input congured as test (Settings table, parameter 11) allows a check of the 
genset to be performed without activation of the load. 
 
 FORCED OPERATION (MFOR)
This function is only managed in automatic mode of the CEM7 control unit. 
The input congured as forced operation (Settings table, parameter 12) complies 
with anti-re regulations according to which it should not stop the operation of 
the genset under any condition except overspeeding and emergency stop 
(whether this is alarm, external start up disabling input or programmed block). It 
is possible to congure 3 modes of forced operation (Regulations table, 
parameter 25):
 • 0: Forced operation not enabled. The process of forced operation is 
not managed despite having an associated programmable input.
 • 1: Starting due to network failure. Before activating the forced 
operation input, the system waits for the start to occur due to a 
programmed condition (alarms related to network signal, network 
contactor failure, external start up...) needed to start the genset. To 
stop the genset it is not sufcient that the start condition disappears, 
but the input associated with the forced operation must be disabled.
 • 2: Starting due to forced operation. Before activating the forced 
operation input, the genset starts immediately without the need to 
wait for any other start condition to occur. To stop the genset, it is 
necessary to switch to manual operating mode and in this mode 
perform the stop using the control unit keyboard. Predominating the 
stop button.
5.2 PROGRAMMABLE INPUTS
The CEM7 control unit's measurements module has 5 digital inputs with 
operation that can be programmed. The programmable inputs can be congured 
to have the following behaviour:
 
 TARIFF WARNING SIGNAL (EJP1)
This function is only managed in automatic mode of the control unit CEM7 + 
CEA7CC2. The input congured as tariff warning (Settings table, parameter 7) 
starts the genset after activating the corresponding input and after a set time 
(Times table, parameter 9). Completion of the tariff ends when the input EJP1 is 
disabled, stopping the engine with cooling.
 
 TARIFF CHANGE SIGNAL (EJP2)
This function is only managed in automatic mode of the control unit CEM7 + 
CEA7CC2. The input congured as tariff change (Settings table, parameter 8) 
activates the genset contactor provided that no fault is found in the genset.
 
 DISABLING START UP SIGNAL (IA + ENT5)
This function is only managed in automatic mode of the CEM7 control unit. The 
input congured as disabling start up (Settings table, parameter 9) prevents the 
genset from starting under any starting condition except in the case of forced start 
up operation (Settings table, parameter 12) congured as high priority (Regulations 
table, parameter 25).
 
 EXTERNAL START SIGNAL (AE + ENT4)
This function is only managed in automatic mode of the CEM7 control unit. The 
input congured as external start (Settings table, parameter 10) forces the start 
up of the genset if it is in automatic mode, provided none of the following 
conditions are present disabling start up:
 • the control unit does not manage the disabling start up input (IA) or it 
is not active.
 • the control unit is not in lock mode programmed by time.
A delay in starting the genset can be congured through an external input via a 
parameter (Regulations table, parameter 31).
 




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 25
VERIFICATION OF GAS RAMP (S1 AND S2)
The input congured to perform the gas train verication function (Settings table, 
parameter 25) is used in gas engines (Regulations table, parameter 18, value 4) 
to complete the testing process of the gas ramp and start the engine start up 
process.
5.3 ANALOGUE INPUTS
The CEM7 control unit has 5 analogue inputs for measuring the engine operation 
values. These analogue inputs characterize the operation of the engine to display 
its status and produce alarms if necessary. By default, the alarms produced by 
the analogue inputs do not stop the control unit (engine warnings), but can be 
congured to perform this stop with or without cooling.
The CEM7 control unit performs a continuous check on the presence of the 
analogue sensors installed, with the readings taken appearing on the display 
module screen.
FUEL LEVEL INPUT (NC)
The fuel level analogue input indicates the amount of fuel remaining in the tank. 
To adapt its operation it is necessary to adjust the maximum fuel tank value 
(Measurements table, parameter 13) and the minimum fuel tank value 
(Measurements table, parameter 12). To adjust go to section 4.3.
Also, it is possible to set a minimum fuel threshold in the tank (Thresholds table, 
parameter 25) to cause an alarm warning (Alarms table, parameters 55-57) when 
the fuel level is detected to be below this limit.
When the BT relay of the measurements module is programmed for managing the 
fuel transfer pump, if the fuel level is detected to be below a lower limit 
(Thresholds table, parameter 18) the fuel transfer pump is activated to provide 
the tank with fuel. The deactivation of the fuel transfer pump occurs when fuel 
level is detected to be above the programmable threshold (Thresholds table, 
parameter 19). When the fuel transfer pump is in manual operation mode, this 
upper threshold leads to the activation of the fuel transfer pump after the user 
presses the relative button.
PROGRAMMABLE ALARMS (AL1, AL2 AND AL3)
There are 3 programmable alarms available (Settings table, parameters 13, 14 
and 15) that can be associated with any of the programmable inputs and which 
serve the purpose of providing the control unit with additional alarms with 
congurable operation (Alarms table, parameters 79 to 87). These alarms can be 
programmed both with regards the mode of action as well as the text shown on 
the display when activated.
PROGRAMMABLE ALARMS (AL4 AND AL5)
There are 2 additional programmable alarms available (Settings table, parameters 
22 and 23) that can be associated with any of the programmable inputs and 
which serve the purpose of providing the control unit with additional alarms with 
congurable operation (Alarms table, parameters 111 to 116). These alarms can 
be programmed both with regards the mode of action as well as the text shown 
on the display when activated. 
NOTE 
From the rmware versions of control units: Display 3.20 / Measurements 2.50
SELECTION OF SET OF PARAMETERS (S1 AND S2)
There are 2 sets of additional parameters that can be enabled via any of the 
programmable inputs (Settings table, parameters 16 and 17). Activating the 
parameter set selection input enables the values with which the control unit 
operates (Selector table).
 
 GENSET CONTACTOR CONFIRMATION (CKG) (PHG7 REV 4.14 AND HIGHER)
The input congured as genset contactor conrmation (Settings table, 
parameter 6) is used to verify the correct activation of the contactor. Upon 
activation of the genset contactor, a time interval begins (Times table, 
parameter 13) for verication of the contactor through the activation of the 
genset contactor conrmation input. If after this time has elapsed there is no 
conrmation of the activation of the genset contactor, a genset contactor alarm 
is generated (Alarms table, parameter 101). If the control unit is operating in 
automatic mode, a stop occurs with engine cooling. Similarly, if the genset 
contactor conrmation input is detected as being active when the contactor is 
not active, the start up of the generator set is inhibited.




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 26
AUXILIARY ANALOGUE INPUT (AA)
The auxiliary analogue input is assigned by default to the supervision of the oil 
temperature and can be programmed to be allocated to any other measurement 
through a programmable curve (Analogue Sensors table).
ANALOGUE INPUTS EXPANSION
The CEM7 control unit allows you to add 8 analogue temperature inputs to the 
PT100 sensor through the expansion of up to 2 CCPT100 devices. 2 maximum 
temperature alarms can be added to each of these 4 analogue temperature 
inputs with a P100 sensor.
The CEM7 control unit allows you to add 4 congurable analogue inputs (voltage 
0 to 10 V, current 4 to 20 mA or resistive) through the expansion of the CCPT100 
device. A congurable response curve, a descriptive text and the units displayed 
in the user interface of the control unit can be associated to each of these 4 
congurable analogue inputs.
5.4 PICKUP INPUT (PKC1, PKC2)
The measurements module pickup input measures the engine speed in 
revolutions per minute (rpm). To calculate the speed it is necessary to enter the 
number of teeth on the ywheel ring gear (Thresholds table, parameter 24). If 
zero is entered as the number of teeth for the ywheel ring gear parameter, the 
control unit is congured to not have a pickup sensor and calculate the rotational 
speed from the frequency generated by the genset according to the ratio 
50Hz/1500rmp, 50Hz/3000rpm or 60Hz/1800rmp or 60Hz/3600rpm 
(Regulations table, parameter 26).
The CEM7 control unit can be congured to produce an overspeeding alarm 
(Alarms table, parameters 22 to 24) as well as a under speed alarm (Alarms 
table, parameters 25 to 27) depending on the mechanical speed provided by the 
pickup.
OIL PRESSURE INPUT (P)
The oil pressure analogue input allows the engine oil pressure value to be 
monitored. The control unit allows connection of VDO type sensors to the 
analogue input. By setting a threshold a minimum oil pressure limit can be 
established (Thresholds table, parameter 26) causing an alarm warning (Alarms 
table, parameters 52 to 54) when the fuel level is detected to be below this limit.
ENGINE INPUT TEMPERATURE (T)
The engine temperature analogue input allows the engine water temperature 
value to be monitored. The control unit allows connection of VDO type sensors to 
the analogue input. By setting a threshold a maximum engine temperature limit 
can be established (Thresholds table, parameter 27) causing an alarm warning 
(Alarms table, parameters 49 to 51) when the temperature is detected to be 
below this limit.
Also, provided heating management is programmed (either through the BT relay 
or through any programmable output, provided that the BT relay is assigned to 
the management of the fuel transfer pump), the engine temperature analogue 
input is used to regulate the activation of the heating resistor.
The control unit allows a temperature threshold to be programmed (Thresholds 
table, parameter 48) for the coolant sensor that interrupts the preheating 
process during the start up of the engine.
ALTERNATOR VOLTAGE INPUT (DI)
The alternator voltage analogue input allows the voltage generated by the battery 
charging alternator to be monitored. This input is used to diagnose possible 
malfunctioning of the alternator if it detects a low voltage while the engine is 
running; under these conditions, a battery alternator alarm (Alarms table, 
parameters 10 to 12) is generated.
Also, this voltage can be programmed for detecting genset start up conditions 
(Regulations table, parameter 20) via an alternator voltage threshold for the engine 
when running (Thresholds table, parameter 21), provided it is not set in dynamo mode 
(Regulations table, parameter 3).




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 27
 • Control PULL/HOLD. The engine start control set in PULL/HOLD 
mode uses the PC engine stop output as a PULL signal which is 
activated for a xed time of 1 second during starting. Any of the 
programmable outputs (SAL1, SAL2 or SAL3) can be used as a HOLD 
signal (Settings table, parameters 1 to 3, value 25) which remains 
active during the time the engine is running.
 FUEL TRANSFER PUMP/HEATING/ELECTRONIC PROTECTION OUTPUT (BT). 
RELAY OUTPUT
The fuel transfer pump/heating output (BT) of the CEM7 control unit is a relay 
output that can be congured (Regulations table, parameter 4) to manage the 
fuel tank relling function through the fuel transfer pump or control the engine 
heating process or electronic protection output for overload or short circuit. 
The fuel transfer pump/heating output (BT) congured as electronic protection is 
activated when the control unit detects excessive consumption (Thresholds 
table, parameters 7 and 8) and activates an overload (Alarms table, parameters 
28 to 30) or short circuit alarm (Alarms table, parameters 58 to 60).
EXCITATION OUTPUT OF THE BATTERY CHARGE ALTERNATOR (D+). DIGITAL 
OUTPUT
The D+ output of the CEM7 control unit is responsible for exciting the battery 
charging alternator during the starting process. This output can be congured 
(Regulations table, parameter 3) to provide a start pulse (alternator mode) for a 
programmable time interval (Times table, parameter 8) or keep the alternator 
continuously energized (dynamo mode). 
 GENSET CONTACTOR OUTPUT (CG). RELAY OUTPUT
The genset contactor output (CG) of the CEM7 control unit is a relay output that 
manages the closing and opening of the contactor. The activation of the genset 
contactor can be congured to be continuous or via a pulse (Times table, 
parameter 29)
5.5 PROGRAMMED DIGITAL OUTPUTS
The CEM7 control unit has 8 specic purpose outputs (2 relay outputs, 3 power 
outputs and 3 digital outputs). 
The functioning of these outputs is preset but can be congured.
 
 PREHEATING OUTPUT. (PR). POWER OUTPUT
The preheating output (PR) of the CEM7 control unit is an output connected to a 
high power shortable driver (70 A) which regulates the heating process of the 
engine's spark plugs during the starting process. The activation time of the 
preheating output can be set (Times table, parameter 4). The preheating output 
can also be used to control stopping via the excitation of engines which use this 
type of stop (Regulations table, parameter 18).
 ENGINE STARTING OUTPUT. (ARR). POWER OUTPUT
The engine starting output (ARR) of the CEM7 control unit is an output connected 
to a high power shortable driver (70 A) which activates the starter. The engine 
starting output remains active until a programmed motor running condition is 
detected (Regulations table, parameters 19 to 22) for a programmable maximum 
time (Times table, parameter 5).
 ENGINE STOP OUTPUT. (PC). POWER OUTPUT
The engine stop output (ARR) of the CEM7 control unit is an output connected to 
a high power shortable driver (70 A) which activates the stopping of the engine. 
The congurable engine stop output (PC) can be congured so that it controls 
engines with four different stop modes (Regulations table, parameter 18):
 • Stop via de-energisation. The engine stop output congured as 
a stop via de-energisation is activated 500 minutes after the 
preheating output has been deactivated, which occurs when the 
engine stop command has been given.
 • Stop by excitation. The engine stop output congured as a stop by 
excitation is activated for a programmable time interval (Times table, 
parameter12) the engine stop command has been given.
 • Stop by excitation/de-energisation. The engine stop output congured 
as a stop by excitation/de-energisation is activated 500 minutes 
after the preheating output has been deactivated, and is deactivated 
when the engine stop command has been given. This output is used 
to enable the engine sensors, with the preheating output involved in 
performing the engine stop via the process of stopping by excitation.




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 28
 STARTED ENGINE OUTPUT (MA). DIGITAL OUTPUT
The started engine output (MA) of the CEM7 control unit is activated when any 
started engine condition is detected and remains active while the engine is 
running. The started engine output (MA) is deactivated as soon as the engine 
stopping process begins; said process includes the engine cooling interval 
(Times table, parameter 11) during the stopping process.
 ELECTRONIC PROTECTION OUTPUT (SC). DIGITAL OUTPUT
The electronic protection output (SC) is activated when any alarm that stops the 
engine is detected. The output remains activated until all the alarms that cause 
the engine to stop disappear and are reported.
5.6 PROGRAMMABLE OUTPUTS
The CEM7 control unit has 3 programmable outputs with operation which can be 
congured to indicate certain states (Settings table, parameters 1 to 3) and a 
relay output (Settings table, parameter 4). The possible congurations that are 
permitted with the programmable outputs are:
INHIBITED OUTPUT
The programmable outputs congured as inhibited output do not respond to any 
action or state as they are permanently disabled.
OUTPUT PROGRAMMED ACCORDING TO THE STATE OF AN INPUT
The programmable outputs (associated with a programmable input) are activated 
when an associated input is detected. 
Possible congurations of associated inputs include the following values: 
 • Fuel reserve input
 • Water level input
 • Programmable input 1
 • Programmable input 2
 • Programmable input 3
ALARM OUTPUT (AL). DIGITAL OUTPUT
The alarm output (AL) is responsible for communicating the different states of 
the CEM7 control unit. The AL output simultaneously activates the ashing of the 
Reset key LED and display module buzzer of the CEM7 control unit. This output 
monitors the following states of the CEM7 control unit:
 • External start of the control unit. Before starting the control unit 
when commanded by a programmable input associated with AE 
mode, the control unit's alarm output (AL) is activated for 5 seconds. 
The activation of the alarm output (AL) due to an external start of the 
control unit can be inhibited (Regulations table, parameter31).
 • Control unit errors. Given an error which is active or pending 
notication by the user, control unit alarm output is activated for 
a maximum programmable time (Times table, parameter 14). The 
errors that activate the AL output are both alarms that cause the 
engine to stop and warnings that do not cause the engine to stop. 
Depending on how the AL output has been programmed (Regulations 
table, parameter 31, acoustic alarm eld):
For an AL outlet that has been programmed as an acoustic signal (Regulations 
table, parameter 31, acoustic alarm, eld value 0), when the user presses the 
RESET key:
 • Continuous activation of the AL output (value 0 in Times table, 
parameter 14): the AL output is disabled, providing there is no active 
error or warning.
 • Timed activation (value in seconds of the activation of the output in 
the Times table, parameter 14): the AL output is disabled the rst 
time the RESET key is pressed or once the output activation time is 
exceeded.
When the AL output is programmed to signal errors (Regulations table, parame-
ter 31, acoustic alarm eld, value 1), when the user presses the RESET key, the 
buzzer of the interface is disabled but the AL output activation is maintained as 
long as any active genset alarm remains in effect or pending notication.




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 29
parameter 26). The programmable output congured as programmed output for 
dummy load is deactivated when higher genset power consumption than the 
programmed threshold is detected (Thresholds table, parameter 33) during a set 
time (Times table, parameter 26). As a condition for enabling the dummy load 
output, the engine must be in a stabilized state.
NOTE
From the rmware versions of control units: Display 3.20 / Measurements 2.50
PROGRAMMED OUTPUT FOR ENGINE HOLD CONTROL MODE
DESCRIPTION
This functionality activates for one second the PC output, simultaneously with the 
programmed output in HOLD mode, in engines controlled in PULL/HOLD mode 
(Regulations table, parameter 18, value 3). The programmed output in HOLD 
mode remains active during engine operation.
For GAS engines (Regulations table, parameter 18, value 4), this functionality 
allows the activation of the gas train at the installation.
PROGRAMMING
To activate the engine's PULL/HOLD control mode, a programmable output must 
be assigned to the HOLD control function (Settings table, parameters 1 to 3, 
value 25).
PROGRAMMED OUTPUT FOR STARTING DUE TO LOAD DEMAND
DESCRIPTION
This functionality allows the activation of an output when the power generated by 
the generator set exceeds a programmable threshold for power generated by the 
genset.
PROGRAMMING
With the generator set in operation, an output programmed with the load demand 
start function will be activated (Settings table, parameters 1-4) when it is 
detected that power consumption exceeds a programmed parameter limit 
(Thresholds table, parameter 34). The output will remain active until the genset 
power consumption falls below a programmed parameter limit (Thresholds table, 
parameter 35). Both with the activation and deactivation of the load demand 
 • Programmable input 4
 • Programmable input 5
PROGRAMMED OUTPUT FOR ALARM
The programmable outputs congured as a programmed output for alarm is 
activated when the control unit detects an active alarm associated to a 
programmable output or has not still not been notied by the user. 
PROGRAMMED OUTPUT FOR FUNCTION
The programmable outputs congured as programmed output for function are 
congured to allow a functionality associated to an output already used. Possible 
congurations of functions include the following values: 
 • Heating resistor. The output programmed to function as heating 
resistor activation if the BT relay is programmed to manage the fuel 
transfer pump.
PROGRAMMED OUTPUT FOR MODE
The programmable outputs congured as a programmed output for mode is 
congured to indicate the mode of operation of the control unit. Possible mode 
congurations include the following values: 
 • Control unit in manual mode.
 • Control unit in auto mode.
PROGRAMMED OUTPUT FOR DUMMY LOAD
DESCRIPTION
This function allows the activation of a loading bank which is separate to the 
installation load, to avoid the generator set operating with low-load, in order to 
prevent excessive oil consumption in the engine and allow it to run with an 
optimal load.
PROGRAMMING
The programmable outputs congured as programmed output for dummy load is 
activated when lower genset power consumption than the programmed threshold 
is detected (Thresholds table, parameter 32) during a set time (Times table, 




CEM7 CONTROL UNIT INPUTS AND OUTPUTS  |  PAGE 30
DESCRIPTION
Programmable outputs can be congured to open the genset contactor for use 
with motorized thermal-magnetic circuit breakers (Settings table, parameter 1 to 
4, value 27). The output can be congured so that it is activated continuously or 
in a timed mode via a pulse (Times table, parameter 29).
PROGRAMMED FUMES CONTROL OUTPUT
DESCRIPTION
Programmable outputs can be congured to initiate the engine start-up process 
with fumes control. This requires assigning a programmable output (Settings 
table, parameters 1 to 4, value 97) that will be enabled during the start-up 
process and will remain active for a programmable length of time (Times table, 
parameter 33) once the engine is running.
5.7 EXPANSION PROGRAMMABLE OUTPUTS
The CEM7 control unit has 4 additional programmable outputs installed in the 
Second Zero Suppression expansion, the operation of which can be congured to 
indicate certain states (Settings table, parameters 18 to 21). Of the 4 outputs 
available, 2 (Programmable outputs 4 and 5) of them are directly connected at 
the terminal and the other 2 (programmable outputs 6 and 7) must be requested 
as a special function. The possible congurations permitted by the programmable 
outputs are the same as those explained in section 5.6 Programmable outputs.
output, the conditions must be validated for a programmable time (Times table, 
parameter 27). 
NOTE
From the rmware versions of control units: Display 4.49 / Measurements 4.01
PROGRAMMED OUTPUT FOR GENSET/NETWORK CONTACTOR STATE (ONLY CEA7)
DESCRIPTION
The programmable outputs can be congured to monitor both the genset 
contactor status and the network contactor status (only CEA control unit).
WATCHDOG PROGRAMMED OUTPUT
DESCRIPTION
The programmable outputs can be congured to monitor the status of the 
electronics. The output remains active if the correct operation of the generator 
set's control system is veried.
STABILIZED ENGINE PROGRAMMED OUTPUT
DESCRIPTION
Programmable outputs can be congured to monitor the stabilized engine status 
(Settings table, parameters 1 to 4 or 24, value 96). The output remains active 
once it detects the stabilized running condition of the engine after start-up (Times 
table, parameter 7) including the cooling time during the stopping cycle.
NOTE: 
Activation of the genset contactor is performed with a programmable time after 
detecting that the engine is in operation (Times table, parameter 6), it being 
possible to dephase the activation of the genset contactor and programmed 
output in STABILIZED ENGINE mode.
PROGRAMMED GENSET CONTACTOR OPENING OUTPUT




CEM7 CONTROL UNIT ALARMS  |  PAGE 31
6. CEM7 CONTROL UNIT ALARMS
The CEM7 control unit has a list of alarms, the operation of which can be 
congured so that actions are performed or so that they are shown on the display 
module screen.
The CEM7 control unit distinguishes between errors that cause the engine to 
stop (alarms) and errors do not cause the engine to stop (warnings).
Upon detection of an alarm or warning, the control unit produces an acoustic 
signal, which activates the alarm digital output (AL) and the LED of the RESET 
button and the display ashes; this condition will remain as long as the error 
condition continues for a programmable maximum period of time (Times table, 
parameter 14).
When there is an alarm, active warning or pending notication, the LED of the 
RESET button remains illuminated. Pressing the RESET button allows the user to 
view a list of alarms, active warnings and pending notication. To scroll through 
the list of errors use the buttons on the display, the up button and down button. 
Pressing the RESET button a second time noties the alarm. 
The list of alarms, active warnings and pending notication has the following 
format:
* ALARM *
MIN. GENSET FREQUENCY
E: Alarm / A: Warning
N: Pending notication
1:

 Position of the error in the list of errors
3: Total number of errors in the list

On the front of the control unit there are LEDs which indicate alarms detected by 
digital sensors (digital inputs) or by analogue sensors (analogue inputs).




EXAMPLES OF ALARM OPERATIONS
 • “EN” Alarm with engine stopped
 • “AN” Warning that needs to be reset
 • “A” Auto-resettable warning
“EN” ALARM WITH ENGINE STOPPED
1. Upon detection of an alarm or warning, the control unit produces an acoustic 
signal, the LED of the RESET button and the display ashes and the alarm digital 
output (AL) is activated. In this case the engine stops.
Fig.1
2. Pressing the RESET button eliminates the acoustic warning. The RESET LED 
remains lit and the type of alarm is shown on the display (which stops ashing). 
Ex: Alarm active “EN” High Water Temperature.
NOTE
Alarms that cause the engine to stop are not auto-resettable, they must be 
notied and reset so that the engine can be restarted, provided that the alarm 
does not remain active.  
The alarms produced by the analogue inputs do not cause the engine to stop, 
just provide a warning in the default setting. They need to be reset to disappear 
from the display, provided that the warning does not remain active, except for 
the fuel level warning which is auto-resettable. 
CEM7 CONTROL UNIT ALARMS  |  PAGE 32




“AN” WARNING THAT NEEDS TO BE RESET, DOES NOT CAUSE THE ENGINE TO 
STOP
1. Upon detection of an alarm or warning, the control unit produces an acoustic 
signal, the LED of the RESET button and the display ashes and the alarm digital 
output (AL) is activated. 
Fig.1
2. Pressing the RESET button eliminates the acoustic warning. The RESET LED 
remains LIT and the type of warning is shown on the display (which stops 
ashing). Active warning “AN”.
TEMPERATURE
HIGH WATER
NOTICE
Fig.2
ALARM
HIGH WATER
TEMPERATURE
Fig.2
3. We provide solutions for the alarm. In this case the temperature of the engine 
when stopped must be lowered. We check the water level of the engine to detect 
the cause of the anomaly. Once the alarm is no longer active "N", it can be reset 
by pressing the RESET button and the engine can be put into operation again. 
TEMPERATURE
HIGH WATER
ALARM
Fig.3 
CEM7 CONTROL UNIT ALARMS  |  PAGE 33




2. Pressing the RESET button eliminates the acoustic warning. The RESET LED 
remains LIT and the type of warning is shown on the display (which stops 
ashing). Warning “A”.
3. This type of warning is auto reset automatically whenever normal operating 
conditions are restored. It focuses on the alarms related to the fuel level as part 
of the default programming and the alarm corresponding to the network 
thresholds. 
WARNING
FUEL RESERVE
Fig.5
3. We provide solutions for the warning. In this case, we stop the engine if we 
believe this is necessary to detect the cause of the anomaly. Once the warning is 
no longer active, "N" appears on the display and it can be reset by pressing the 
RESET button.
NOTICE
HIGH WATER
TEMPERATURE
Fig.3
“A” AUTO-RESETTABLE WARNING
1. Upon detection of an alarm or warning, the control unit produces an acoustic 
signal, the LED of the RESET button and the display ashes and the alarm digital 
output (AL) is activated. 
Fig.4
CEM7 CONTROL UNIT ALARMS  |  PAGE 34




CEM7 CONTROL UNIT ALARMS  |  PAGE 35
Description Front LED Type Action
Low engine temperature Notice Not for engine
Unit signal failure Alarm
Engine stops with 
cooling
Engine communication 
(only CEM7J option)
Notice Not for engine
Temperature Warning 
(only expansion PT100)
6.1.2 GENERATOR ALARMS
Table 2
Description of the generator alarms
Description Type Action
Overload  Alarm Genset stops with cooling
Genset voltage asymmetry Alarm Genset stops with cooling
Maximum genset voltage Alarm Genset stops immediately without cooling
Maximum genset frequency Alarm Genset stops immediately without cooling
Incorrect genset phases sequence Alarm Genset stops with cooling
Reverse Power Alarm Genset stops with cooling
Short Circuit Alarm Genset stops with cooling
Minimum genset voltage Alarm Genset stops with cooling
Minimum genset frequency Alarm Genset stops with cooling
6.1.3 ALARMS ASSOCIATED WITH PROGRAMMABLE INPUTS
There are three free programmable alarms that can be associated with engine 
alarms and they can be reected on the display via LEDS Aux1 and Aux2.
6.1 LIST OF ALARMS
The list of active alarms and warnings can be grouped as follows (according to 
the MANUFACTURER'S DEFAULT SETTINGS)
6.1.1 ENGINE ALARMS
Table 1
Description of the engine alarms
Description Front LED Type Action
High water temperature Flashing LED alarm
Engine stops immedi-
ately without cooling
Low oil pressure Flashing LED alarm
Engine stops immedi-
ately without cooling
Emergency Stop alarm
Engine stops immedi-
ately without cooling
Battery charging alternator 
failure (with engine 
running)
LED off warning Not for engine
Starting failure Flashing LED
Low water level Flashing LED alarm
Engine stops immedi-
ately without cooling
Fuel reserve Flashing LED warning Not for engine
Overspeeding Lit LED alarm
Engine stops immedi-
ately without cooling
Under Speed alarm
Engine stops with 
cooling
Low battery voltage Notice Not for engine
High water temperature by 
sensor
Lit LED Notice Not for engine
Low oil pressure by sensor Lit LED Notice Not for engine
Low fuel level by sensor Lit LED Notice
Not for engine
Unexpected stop
Stop failure




CEM7 CONTROL UNIT ALARMS  |  PAGE 36
The high water temperature alarm is set by default (Alarms table, parameter 3) to 
always perform an immediate stop of the engine.
NOTE
In the CEM7J option the ATA input can be assigned to a programmable alarm. In 
this case, the alarm detection is performed by the engine's CIU and transmitted 
by the communication bus J1939.
 LOW OIL PRESSURE
The CEM7 control unit's low oil pressure alarm is associated with the digital 
input specically for the low oil pressure (BPA) or errors detected by the engine's 
CIU (only CEM7J option). The status of this input must be validated during a time 
interval (Times table, parameter 16) for stabilisation (debounce) before 
generating the low oil pressure alarm.
It can be congured as normally open or normally closed (Regulations table, 
parameter 6).
The low oil pressure alarm is set by default (Alarms table, parameter 4) to be 
activated when it is detected that the engine has been started.
A low oil pressure alarm can be associated with a time (Alarms table, 
parameter 5) to delay the moment at which the alarm begins to conrm the alarm 
conditions.
The low oil pressure alarm is set by default (Alarms table, parameter 6) to always 
perform an immediate stop of the engine.
NOTE
In the CEM7J option the BPA input can be assigned to a programmable alarm. In 
this case, the alarm detection is performed by the engine's CIU and transmitted 
by the communication bus J1939.
6.2 DESCRIPTION OF THE ALARMS
Table 3
Description of the alarms associated with programmable inputs
Description Type Action
Associated with programmable inputs Alarm According to conguration
Conrmation of Contactor Alarm Engine stopped
All alarms except those which are non-programmable, can be congured as 
follows:
To be activated:
 • Never
 • Always
 • During the start up of the engine
 • From detection that the engine has started
 • From the nominal condition of the engine
To perform one of the following actions:
 • Not perform any actions (warning)
 • Stop the engine with cooling of the engine
 • Perform an immediate stop of the engine
The default conguration of each of the alarms will be highlighted.
 
 HIGH WATER TEMPERATURE
The CEM7 control unit's high water temperature alarm is associated with the 
digital input specically for the high water temperature (ATA) or errors detected by 
the engine's CIU (only CEM7J option). The status of this input must be validated 
during a time interval (Times table, parameter 17) for stabilisation (debounce) 
before generating the high water temperature alarm.
It can be congured as normally open or normally closed (Regulations table, 
parameter 7). Detection of the high water temperature alarm is set by default 
(Alarms table, parameter 1) to always be active.
A high water temperature alarm can be associated with a time (Alarms table, 
parameter 2) to delay the moment at which the alarm begins to conrm the alarm 
conditions.




CEM7 CONTROL UNIT ALARMS  |  PAGE 37
 STARTING FAILURE
The CEM7 control unit's starting failure alarm is generated if the number of 
consecutive retries (Times table, parameter 1) and failures is exceeded during 
engine start. Between each start attempt a programmable delay is observed 
(Times table, parameter 2). Once the alarm has been generated the control unit 
waits for the notication by the user before retrying the engine starting process.
 LOW WATER LEVEL
The CEM7 control unit's low water level alarm is associated with the digital input 
specically for the low water level (NA) or errors detected by the engine's CIU 
(only CEM7J option). The status of this input must be validated during a time 
interval (Times table, parameter 18) for stabilisation (debounce) before 
generating the low water level alarm.
It can be congured as normally open or normally closed (Regulations table, 
parameter 8).
Detection of the low water level alarm is set by default (Alarms table, 
parameter 16) to always be active.
A low water level alarm can be associated with a time (Alarms table, 
parameter 17) to delay the moment at which the alarm begins to conrm the 
alarm conditions.
The low water level alarm is set by default (Alarms table, parameter 18) to always 
perform an immediate stop of the engine if it is not already stopped.
NOTE
In the CEM7J option the NA input can be assigned to a programmable alarm. In 
this case, the alarm detection is performed by the engine's CIU and transmitted 
by the communication bus J1939.
 EMERGENCY STOP (ACTION NOT PROGRAMMABLE)
The CEM7 control unit's emergency stop alarm is associated with the digital 
input specically provided for emergency stops (PEM).
It can be congured as normally open or normally closed (Regulations table, 
parameter 11).
Similarly, the emergency stop alarm is also associated with the SETA input of the 
measurements module; said input cuts power to the power outputs of the 
measurements module (stops engine) ensuring the engine shutdown is set as 
stop via de-energisation (Regulations table, parameter 18) independently of the 
control unit's electronics. With engines set to stop while powered, the input must 
be earthed.
The emergency stop alarm always executes the engine shutdown without cooling. 
It is not possible with this action to associate any delay time, set to engage 
immediately after detecting the emergency stop input (PEM).
 BATTERY CHARGING ALTERNATOR FAILURE
The CEM7 control unit's battery charging failure alarm is associated with the 
analogue input for the battery charging alternator voltage (DI). The voltage 
measured via said input must exceed the voltage threshold for detecting that the 
engine has started (Thresholds table, parameter 21); otherwise, this battery 
alternator failure alarm is activated.
The battery alternator failure alarm is set by default (Alarms table, parameter 10) 
to be activated when it is detected that the engine has been started.
A battery alternator failure alarm can be associated a debounce time (Alarms 
table, parameter 11) during which the voltage measured via the DI input must be 
kept below the detection threshold for the started engine as a condition causing 
the activation of the battery alternator failure alarm.
The battery alternator failure alarm is set by default (Alarms table, parameter 12) 
to perform no action (warning).




CEM7 CONTROL UNIT ALARMS  |  PAGE 38
 UNDER SPEED
The CEM7 control unit's under speed alarm is associated with the measurement 
of the engine ywheel ring gear's rotation speed or through the J1939 channel of 
communication with the engine (only CEM7J option). This measurement is 
performed via the pickup input of the measurements module. Alarm management 
is limited to the fact that the parameter for the number of teeth on the ywheel 
ring gear (Thresholds table, parameter 24) is not zero.
Detection of the under speed alarm is set by default (Alarms table, parameter 25) 
to be activated under nominal engine conditions.
An under speed alarm can be associated a debounce time (Alarms table, 
parameter 26) during which it must be kept below the minimum threshold set 
(Thresholds table, parameter 12).
The under speed alarm is set by default (Alarms table, parameter 27) to always 
perform a stop of the engine with cooling.
 OVERLOAD
The CEM7 control unit's overload alarm is associated with the measurement of 
the RMS current in any phase which exceeds the maximum overload limit 
programmed (Thresholds table, parameter 7) but which is lower than the 
maximum short circuit limit (Thresholds table, parameter 8). 
The phases which are evaluated for the detection of the overload alarm are 
selected depending on the conguration of the installation phases (Thresholds 
table, parameter 1):
 • In a single phase conguration phase 1 is tested.
 • In a two-phase conguration phases 1 and 2 are tested.
 • In a three-phase conguration with neutral or three-phase without 
neutral phases 1, 2 and 3 are tested.
Detection of the overload alarm is set by default (Alarms table, parameter 28) to 
be activated under nominal engine conditions. An overload alarm can be 
associated a debounce time (Alarms table, parameter 29) during which the 
current measured in a particular phase must be kept above the maximum 
threshold limit programmed (Thresholds table, parameter 7). The overload alarm 
is congured by default (Alarms table, parameter 30) to perform a stop of the 
engine with cooling.
 FUEL RESERVE
The CEM7 control unit's fuel reserve alarm is associated with the digital input 
specically provided for the fuel reserve (RC). The status of this input must be 
validated during a time interval (Times table, parameter 15) for stabilisation 
(debounce) before generating the fuel reserve alarm.
It can be congured as normally open or normally closed (Regulations table, 
parameter 5).
Detection of the fuel reserve alarm is set by default (Alarms table, parameter 19) 
to always be active.
A fuel reserve alarm can be associated with a time (Alarms table, parameter 20) 
to delay the moment at which the alarm begins to conrm the alarm conditions.
The fuel reserve alarm is set by default (Alarms table, parameter 21) to perform 
no action (warning).
User intervention is not required to reset the generator set after a low fuel alarm 
has been generated (auto reportable alarm).
 OVERSPEEDING
The CEM7 control unit's overspeeding alarm is associated with the measurement 
of the engine ywheel ring gear's rotation speed or through the J1939 channel of 
communication with the engine (only CEM7J option). This measurement is 
performed via the pickup input of the measurements module. Alarm management 
is limited to the fact that the parameter for the number of teeth on the ywheel 
ring gear (Thresholds table, parameter 24) is not zero.
Detection of the overspeeding alarm is set by default (Alarms table, parameter 22) 
to be activated under nominal engine conditions.
An overspeeding alarm can be associated a debounce time (Alarms table, 
parameter 23) during which the ring gear rotation speed must be kept above the 
maximum rotation speed limit (Thresholds table, parameter 11).
The overspeeding alarm is set by default (Alarms table, parameter 24) to always 
perform an immediate stop of the engine.




CEM7 CONTROL UNIT ALARMS  |  PAGE 39
 MAXIMUM GENSET FREQUENCY
The CEM7 control unit's maximum genset frequency alarm is associated with the 
condition that the frequency generated by the genset is above the maximum 
frequency limit set (Thresholds table, parameter 5).
The measurement of genset frequency is carried out on the rst phase. If in that 
phase no signal is detected, the frequency measurement is then carried out on 
the second phase. Likewise, if in that phase no signal is detected either, the 
frequency measurement is then carried out on the third phase. 
Detection of the maximum genset frequency alarm is set by default (Alarms 
table, parameter 37) to be activated under nominal engine conditions.
A maximum genset frequency alarm can be associated a debounce time (Alarms 
table, parameter 38) during which the frequency must be kept above the 
maximum threshold limit set (Thresholds table, parameter 5). The maximum 
genset frequency alarm is set by default (Alarms table, parameter 39) to perform 
an immediate stop of the engine.
 INCORRECT GENSET PHASES SEQUENCE
The CEM7 control unit’s incorrect genset phases sequence alarm is associated 
to the fact that the genset voltage inputs of each phase are in order (phases 123 
for direct conguration of sequences —value 0, Regulations table, parameter 
34— or phases 321 for inverse conguration of sequences —value 1, 
Regulations table, parameter 34—).
The incorrect genset phases sequence alarm is only enabled when the control 
unit is congured to work three-phase with neutral or three-phase without neutral.
Detection of the incorrect genset phase sequence alarm is set by default (Alarms 
table, parameter 40) to be activated: From the rated condition of the engine.
An incorrect genset phases sequence alarm can be associated a debounce time 
(Alarms table, parameter 41) during which an incorrect order in the maximum 
genset voltages must be detected.
The incorrect network phases sequence alarm is set by default (Alarms table, 
parameter 42) to: Stop the engine with cooling of the engine.
 GENSET VOLTAGE ASYMMETRY
The CEM7 control unit's genset voltage asymmetry alarm is associated with the 
fact that the difference between any two RMS voltages between genset voltage 
phases (VG12, VG23 or VG31) exceeds the maximum asymmetry limit 
programmed (Thresholds table, parameter 4). 
The voltage asymmetry alarm is activated only when the control unit is congured 
to measure the voltage of three-phase with neutral or three-phase without 
neutral. Detection of the genset voltage asymmetry alarm is set by default 
(Alarms table, parameter 31) to be activated under nominal engine conditions.
The CEM7 control unit's genset voltage asymmetry alarm can be associated a 
rebounce time (Alarms table, parameter 32) during which the difference between 
any two values of genset phase voltage (VG12, VG23 or VG31) should be kept 
above the maximum limit set (Thresholds table, parameter 4). The genset voltage 
asymmetry alarm is set by default (Alarms table, parameter 33) to always perform 
a stop of the engine with cooling.
 MAXIMUM GENSET VOLTAGE
The CEM7 control unit's maximum genset voltage alarm is associated with the 
condition that the measurement of the genset's RMS voltage is above the 
maximum voltage limit set (Thresholds table, parameter 2). 
The phases which are evaluated for the detection of the maximum genset voltage 
alarm are selected depending on the conguration of the installation phases 
(Thresholds table, parameter 1):
 • In a single phase conguration voltage V1N is tested.
 • In a two-phase conguration voltage V12 is tested.
 • In a three-phase conguration with neutral or three-phase without 
neutral, phases V12, V23 and V13 are tested.
Detection of the maximum genset voltage alarm is set by default (Alarms table, 
parameter 34) to be activated under nominal engine conditions. A maximum 
genset voltage alarm can be associated a debounce time (Alarms table, 
parameter 35) during which the voltage must be kept above the maximum 
threshold limit set (Thresholds table, parameter 2). The maximum genset voltage 
alarm is set by default (Alarms table, parameter 36) to perform an immediate stop 
of the engine.




CEM7 CONTROL UNIT ALARMS  |  PAGE 40
 HIGH WATER TEMPERATURE BY SENSOR
The CEM7 control unit's high water temperature by sensor alarm is associated 
with the analogue input for the water temperature (T). The high water temperature 
by sensor alarm is activated when a higher temperature is detected than the 
programmed limit (Thresholds table, parameter 27).
Detection of the high water temperature alarm by sensor is set by default (Alarms 
table, parameter 49) to always be active.
A high water temperature by sensor alarm can be associated a debounce time 
(Alarms table, parameter 50) during which it must be detected that the water 
temperature is above the limit set (Thresholds table, parameter 27).
The high water temperature by sensor alarm is set by default (Alarms table, 
parameter 51) to perform no action (warning).
 LOW OIL PRESSURE BY SENSOR
The CEM7 control unit's low oil pressure by sensor alarm is associated with the 
analogue input for the oil pressure (T). The low oil pressure by sensor alarm is 
activated when lower pressure is detected than the programmed limit (Thresholds 
table, parameter 26).
The low oil pressure by sensor alarm is set by default (Alarms table, parameter 52) 
to be activated when it is detected that the engine has been started.
A low oil pressure alarm can be associated a debounce time (Alarms table, 
parameter 53) during which it must be detected that the oil pressure is below the 
limit set (Thresholds table, parameter 26).
The low oil pressure alarm is set by default (Alarms table, parameter 54) to 
perform no action (warning).
 REVERSE POWER
The CEM7 control unit's reverse power alarm is activated when the power 
measured for the genset is negative and greater than the value resulting from 
calculating the factor programmed as a percentage (Thresholds table, 
parameter 10) of the nominal power (Thresholds table, parameter 9).
Sometimes the reverse power alarm may be due to the incorrect wiring of the 
current transformers.
Detection of the reverse power alarm is set by default (Alarms table, 
parameter 43) to be activated under nominal engine conditions.
A reverse power alarm can be associated a debounce time (Alarms table, 
parameter 44) during which the power measured must be outside the 
programmed limit.
The reverse power alarm is set by default (Alarms table, parameter 45) to perform 
a stop of the engine with cooling.
 LOW BATTERY VOLTAGE
The CEM7 control unit's low battery voltage alarm is activated when the battery 
voltage measured falls below a set limit (Thresholds table, parameter 17).
Detection of the low battery voltage alarm is set by default (Alarms table, 
parameter 46) to always be active.
A low battery voltage alarm can be associated a debounce time (Alarms table, 
parameter 47) during which it must be detected that the battery voltage is below 
the limit set (Thresholds table, parameter 17).
The low battery voltage alarm is set by default (Alarms table, parameter 48) to 
perform no action (warning).




CEM7 CONTROL UNIT ALARMS  |  PAGE 41
 HIGH BATTERY VOLTAGE
The CEM7 control unit's high battery voltage alarm is activated when the battery 
voltage measured is above a set limit (Thresholds table, parameter 36).
Detection of the high battery voltage alarm is set by default (Alarms table, 
parameter 120) to never be active.
A high battery voltage alarm can be associated a debounce time (Alarms table, 
parameter 121) during which it must be detected that the battery voltage is 
above the limit set (Thresholds table, parameter 36).
The high battery voltage alarm is set by default (Alarms table, parameter 122) to 
perform no action (warning).
 LOW BATTERY VOLTAGE WHEN STARTING
The CEM7 control unit's low battery voltage when starting alarm is activated 
when the battery voltage measured is below a set limit (Thresholds table, 
parameter 37).
Detection of the low battery voltage when starting alarm is set by default (Alarms 
table, parameter 123) to always be active and cannot be modied.
A low battery voltage when starting alarm can be associated a debounce time 
(Alarms table, parameter 124) during which it must be detected that the battery 
voltage is below the limit set (Thresholds table, parameter 37).
The low battery voltage alarm is set by default (Alarms table, parameter 125) to 
perform no action (warning).
 LOW FUEL LEVEL BY SENSOR
The CEM7 control unit's low fuel level by sensor alarm is associated with the 
analogue input for the fuel level (NC). The low fuel level by sensor alarm is 
activated when the fuel level detected is lower than the programmed limit 
(Thresholds table, parameter 25).
Detection of the low fuel level alarm is set by default (Alarms table, parameter 55) 
to always be active.
A low fuel level alarm can be associated a debounce time (Alarms table, 
parameter 56) during which it must be detected that the fuel level is below the 
limit set (Thresholds table, parameter 25).
The low fuel level alarm is set by default (Alarms table, parameter 57) to perform 
no action.
User intervention is not required to reset the generator set after a low fuel level 
by sensor alarm is generated (auto reportable alarm).
 LOW AUXILIARY BATTERY VOLTAGE
The CEM7 control unit's low auxiliary battery voltage alarm is activated when the 
voltage measured for the battery connected to the Second zero expansion falls 
below a set limit (Thresholds table, parameter 31).
Detection of the low auxiliary battery voltage alarm is set by default (Alarms 
table, parameter 117) to never be active.
A low auxiliary battery voltage alarm can be associated a debounce time (Alarms 
table, parameter 118) during which it must be detected that the battery voltage 
is below the limit set (Thresholds table, parameter 31).
The low auxiliary battery voltage alarm is set by default (Alarms table, 
parameter 119) to perform no action.




CEM7 CONTROL UNIT ALARMS  |  PAGE 42
 MINIMUM GENSET FREQUENCY
The CEM7 control unit's minimum genset frequency alarm is associated with the 
condition that the frequency generated by the genset is below the minimum 
frequency limit set (Thresholds table, parameter 6).
The measurement of genset frequency is carried out on the rst phase. If in that 
phase no signal is detected, the frequency measurement is then carried out on 
the second phase. Likewise, if in the second phase no signal is detected either, 
a measurement is then taken of the third phase frequency. Detection of the 
minimum genset frequency alarm is set by default (Alarms table, parameter 64) 
to be activated under nominal engine conditions.
A minimum genset frequency alarm can be associated a debounce time (Alarms 
table, parameter 65) during which the frequency must be kept below the 
maximum threshold limit set (Thresholds table, parameter 6). The minimum 
genset frequency alarm is set by default (Alarms table, parameter 66) to perform 
a stop of the engine with cooling.
 UNEXPECTED STOP
The CEM7 control unit's unexpected stop alarm is generated if, while the engine 
is running, all the running engine conditions are no longer detected (Table 
Regulations, parameters 19-22).
 STOP FAILURE
The CEM7 control unit's stop failure alarm is generated if 15 seconds have 
elapsed after stopping the engine and not all the stopped engine conditions are 
detected (Table Regulations, parameters 19-22). 
In the event the stop failure alarm has been disabled (Alarms table, 
parameter 70), after waiting a maximum of 15 seconds for stopped engine 
conditions, the control unit considers that the engine is stopped.
To detect the engine as stopped, all the stop conditions must be detected for a 
set period of time (Alarms table, parameter 71).
 SHORT CIRCUIT
The CEM7 control unit's short circuit alarm is associated with the condition that 
the measurement of the RMS current is above the maximum short circuit limit 
set (Thresholds table, parameter 8). 
The phases which are evaluated for the detection of the short circuit alarm are 
selected depending on the conguration of the installation phases (Thresholds 
table, parameter 1):
 • In a single phase conguration phase 1 is tested.
 • In a two-phase conguration phases 1 and 2 are tested.
 • In a three-phase conguration with neutral or three-phase without 
neutral phases 1, 2 and 3 are tested.
Detection of the short circuit alarm is set by default (Alarms table, parameter 58) 
to be activated: Under nominal engine conditions.
The short circuit alarm is set by default (Alarms table, parameter 60) to perform 
a stop of the engine with cooling.
 MINIMUM GENSET VOLTAGE
The CEM7 control unit's minimum genset voltage alarm is associated with the 
condition that the measurement of the genset's RMS voltage is less than the 
minimum voltage limit set (Thresholds table, parameter 3). 
The phases which are evaluated for the detection of the minimum genset voltage 
alarm are selected depending on the conguration of the installation phases 
(Thresholds table, parameter 1):
 • In a single phase conguration voltage V1N is tested.
 • In a two-phase conguration voltage V12 is tested.
 • In a three-phase conguration with neutral or three-phase without 
neutral, phases V12, V23 and V13 are tested.
Detection of the minimum genset voltage alarm is set by default (Alarms table, 
parameter 61) to be activated under nominal engine conditions. A minimum 
genset voltage alarm can be associated a debounce time (Alarms table, 
parameter 62) during which the voltage must be kept below the minimum 
threshold limit set (Thresholds table, parameter 3). The minimum genset voltage 
alarm is set by default (Alarms table, parameter 63) to perform a stop of the 
engine with cooling.




CEM7 CONTROL UNIT ALARMS  |  PAGE 43
 PROGRAMMABLE ALARM 1
The CEM7 control unit's programmable alarm 1 is activated associating the 
operating mode of the programmable alarms (Settings table, parameter 13) to 
one of the general purpose digital inputs (ENT1, ENT2, ENT3, ENT4 or ENT5) or 
one of the engine alarm inputs (ATA, BPA or NA) in the CEM7J option. The status 
of this input must be validated during a time interval (Times table, parameter 19, 
20, 22, 23 or 24) for stabilisation (debounce) before generating programmable 
alarm 1.
Detection of the programmable alarm 1 is set by default (Alarms table, 
parameter 79) to never be activated: Programmable alarm 1 can be associated 
with a time (Alarms table, parameter 80) to delay the moment at which the alarm 
begins to conrm the alarm conditions.
Detection of the programmable alarm 1 is set by default (Alarms table, 
parameter 81) to perform one of the following actions: Not perform any actions 
(warning). Programmable alarm 1 can be associated with a programmable text 
that appears on the display of the display module when the active alarm is 
detected.
 PROGRAMMABLE ALARM 2
The CEM7 control unit's programmable alarm 2 is activated associating the 
operating mode of the programmable alarms (Settings table, parameter 14) to 
one of the general purpose digital inputs (ENT1, ENT2, ENT3, ENT4 or ENT5) or 
one of the engine alarm inputs (ATA, BPA or NA) in the CEM7J option. The status 
of this input must be validated during a time interval (Times table, parameter 19, 
20, 22, 23 or 24) for stabilisation (debounce) before generating programmable 
alarm 2.
Detection of the programmable alarm 2 is set by default (Alarms table, 
parameter 82) to never be activated:
Programmable alarm 2 can be associated with a time (Alarms table, 
parameter 83) to delay the moment at which the alarm begins to conrm the 
alarm conditions. Programmable alarm 2 is set by default (Alarms table, 
parameter 84) to perform no action (warning).
Programmable alarm 2 can be associated with a programmable text that appears 
on the display of the display module when the active alarm is detected.
 LOW ENGINE TEMPERATURE
The CEM7 control unit's low engine temperature alarm is associated with the 
analogue input for the water temperature (T). The low engine temperature alarm 
is activated when a lower temperature is detected than the programmed limit 
(Thresholds table, parameter 28).
Detection of the low engine temperature alarm is set by default (Alarms table, 
parameter 73) to never be active.
A low engine temperature alarm can be associated a debounce time (Alarms 
table, parameter 74) during which it must be detected that the engine 
temperature is below the limit set (Thresholds table, parameter 28).
The low engine temperature alarm can be congured (Alarms table, parameter 75) 
to not activate the genset contactor (CG) until the engine does not exceed the 
programmed low temperature limit (Thresholds table, parameter 28).
 GENSET SIGNAL FAILURE
The CEM7 control unit's genset failure signal alarm is generated if no genset 
voltage is detected during any phase while the engine is running. 
Detection of the genset failure signal alarm is set by default (Alarms table, 
parameter 76) to be activated under nominal engine conditions.
A genset failure signal alarm can be associated a debounce time (Alarms table, 
parameter 77) during which no signal must be detected during any phase before 
activating the alarm.
The genset failure signal alarm is set by default (Alarms table, parameter 78) to 
always perform a stop of the engine with cooling.




CEM7 CONTROL UNIT ALARMS  |  PAGE 44
 PROGRAMMABLE ALARM 5
The CEM7 control unit's programmable alarm 5 is activated associating the 
operating mode of the programmable alarms (Settings table, parameter 23) to 
one of the general purpose digital inputs (ENT1, ENT2, ENT3, ENT4 or ENT5) or 
one of the engine alarm inputs (ATA, BPA or NA) in the CEM7J option. The status 
of this input must be validated during a time interval (Times table, parameter 19, 
20, 22, 23 or 24) for stabilisation (debounce) before generating programmable 
alarm 5.
Detection of the programmable alarm 5 is set by default (Alarms table, 
parameter 85) to never be activated: Programmable alarm 5 can be associated 
with a time (Alarms table, parameter 86) to delay the moment at which the alarm 
begins to conrm the alarm conditions. Programmable alarm 5 is set by default 
(Alarms table, parameter 87) to perform no action (warning). Programmable 
alarm 5 can be associated with a programmable text that appears on the display 
of the display module when the active alarm is detected.
 GENSET CONTACTOR SWITCHING FAILURE (CEM7 VER455 /PHG7 VER407 
OR HIGHER)
The CE control unit's genset contactor failure alarm is generated if:
 • the genset contactor is activated through the CG relay of the 
measurements module and the activation is not detected through 
the programmed input (ENT1, ENT2, ENT3, ENT4 or ENT5) associated 
to the conrmation mode of the genset contactor (Settings table, 
parameter6).
 • the genset contactor is deactivated through the CG relay of the 
measurements module and the activation is detected through the 
programmed input (ENT1, ENT2, ENT3, ENT4 or ENT5) associated 
to the conrmation mode of the genset contactor (Settings table, 
parameter6).
It is possible to program a delay before checking the genset contactor failure 
alarm (Times table, parameter 13) to allow time for proper activation of the 
contactor. The status of this programmable input associated to the conrmation 
mode of the genset contactor must be validated during a time interval (Times 
table, parameter 19, 20, 22, 23 or 24) for stabilisation before being managed. To 
enable the genset contactor failure alarm a set programmable input must be 
assigned (ENT1, ENT2, ENT3, ENT4 or ENT5) which is associated to the 
conrmation mode of the genset contactor (Settings table, parameter 6).
 PROGRAMMABLE ALARM 3
The CEM7 control unit's programmable alarm 3 is activated associating the 
operating mode of the programmable alarms (Settings table, parameter 15) to 
one of the general purpose digital inputs (ENT1, ENT2, ENT3, ENT4 or ENT5) or 
one of the engine alarm inputs (ATA, BPA or NA) in the CEM7J option. The status 
of this input must be validated during a time interval (Times table, parameter 19, 
20, 22, 23 or 24) for stabilisation (debounce) before generating programmable 
alarm 3.
Detection of the programmable alarm 3 is set by default (Alarms table, 
parameter 85) to never be activated: Programmable alarm 3 can be associated 
with a time (Alarms table, parameter 86) to delay the moment at which the alarm 
begins to conrm the alarm conditions.
Programmable alarm 3 is set by default (Alarms table, parameter 87) to perform 
no action (warning). Programmable alarm 3 can be associated with a 
programmable text that appears on the display of the display module when the 
active alarm is detected.
   PROGRAMMABLE ALARM 4
The CEM7 control unit's programmable alarm 4 is activated associating the 
operating mode of the programmable alarms (Settings table, parameter 22) to 
one of the general purpose digital inputs (ENT1, ENT2, ENT3, ENT4 or ENT5) or 
one of the engine alarm inputs (ATA, BPA or NA) in the CEM7J option. The status 
of this input must be validated during a time interval (Times table, parameter 19, 
20, 22, 23 or 24) for stabilisation (debounce) before generating programmable 
alarm 4.
Detection of the programmable alarm 4 is set by default (Alarms table, 
parameter 82) to never be activated:
Programmable alarm 4 can be associated with a time (Alarms table, 
parameter 83) to delay the moment at which the alarm begins to conrm the 
alarm conditions. Programmable alarm 4 is set by default (Alarms table, 
parameter 84) to perform no action (warning).
Programmable alarm 4 can be associated with a programmable text that appears 
on the display of the display module when the active alarm is detected.




CEM7 CONTROL UNIT ALARMS  |  PAGE 45
 ENGINE J1939 COMMUNICATION
The engine J1939 communication alarm veries proper communication between 
the CEM7J control unit and the engine via the J1939 bus. This alarm is only 
available for CEM7J control units which have the J1939 option installed.
Detection of the engine J1939 communication alarm is set by default (Alarms 
table, parameter 144) to be activated when starting:
The engine J1939 communication alarm can be associated a rebounce time to 
ensure proper alarm detection (Alarms table, parameter 145).
The engine J1939 communication alarm is set by default (Alarms table, 
parameter 146) to perform no action (warning).
 HIGH TEMPERATURE PT100 PROBE 1 TO 4 LEVEL 2 (CEM7 VER461 / PHG7 
VER419 OR HIGHER): REQUIRES PT100 PROBES MODULE EXPANSION
The CEM7 control unit's high temperature alarm for PT100 level 2 probes 1 to 4 
is associated to the analogue inputs for PT100 temperature of the analogue 
input expansion. The high temperature alarm for PT100 probes 1 to 4 is activated 
when a higher temperature is detected than the programmed limit (Thresholds 
table, parameter 43 to 46). The use of a second temperature level to generate 
alarms allows the generation of warnings in advance of the temperature alarm 
with management that is independent of the alarm.
Detection of the high temperature alarm for PT100 level 2 probes 1 to 4 is set by 
default (Alarms table, parameter 147, 150, 153 and 156) to never be activated.
A high temperature alarm for PT100 level 2 probes 1 to 4 can be associated a 
debounce time (Alarms table, parameters 148, 151, 154 and 157) during which 
it must be detected that the temperature is above the limit set (Thresholds table, 
parameters 39 to 42).
The high temperature alarm for PT100 level 2 probes 1 to 4 is set by default 
(Alarms table, parameter 149, 152, 155 and 158) to perform no action (warning).
Management of the genset contactor failure alarm can be congured (Alarms 
table, parameter 102) to:
 • Not perform the detection.
 • Perform the detection and before activation stop the engine with 
cooling.
GENSET POWER ALARM (CEM7 VER460 / PHG7 VER 4.19 OR HIGHER)
The CEM7 control unit's genset power alarm is associated to the actual genset 
power measured. When the power generated by the genset exceeds a 
programmable percentage (Thresholds table, parameter 38) of the nominal power 
set (Thresholds table, parameter 9) during a programmable interval of time 
(debounce) (Alarms table, parameter 130). 
Detection of the genset power alarm is set by default (Alarms table, 
parameter 129) to be activated: Under nominal engine conditions. The genset 
power alarm is set by default (Alarms table, parameter 131) to perform no action 
(warning).
 HIGH TEMPERATURE PT100 PROBE 1 TO 4 (CEM7 VER461 / PHG7 VER419 
OR HIGHER): REQUIRES PT100 PROBES EXPANSION
The CEM7 control unit's high temperature alarm for PT100 probes 1 to 4 is 
associated to the analogue inputs for PT100 temperature of the analogue input 
expansion. The high temperature alarm for PT100 probes 1 to 4 is activated 
when a temperature value above the programmed limit (Thresholds table, 
parameters 39-42) is detected or when the probe is detected as not connected.
Detection of the high temperature alarm for PT100 probes 1 to 4 is set by default 
(Alarms table, parameter 132, 135, 138 and 141) to never be activated. A high 
temperature alarm for PT100 probes 1 to 4 can be associated a debounce time 
(Alarms table, parameters 133, 136, 139 and 142) during which it must be 
detected that the water temperature is above the limit set (Thresholds table, 
parameters 39 to 42).
The high temperature alarm for PT100 probes 1 to 4 is set by default (Alarms table, 
parameter 134, 137, 140 and 143) to perform no action (warning).




CEM7 CONTROL UNIT ALARMS  |  PAGE 46
EXAMPLE CALCULATION OF THE IDMT CURVE TIME CONSTANT (T)
For a genset current (I) with a value of 110% of the nominal value, the desired 
tripping time (td) is 1 hour (3,600 seconds).
From the IDMT curve equation, we obtain the time constant:
For a genset current value of 110% of In, the value is set to the ratio  
Therefore, the value of the time constant for a trip time of 3,600 sec for a current 
110% of the nominal is established as:
IDMT ALARM
The CEM7 control unit’s IDMT alarm is associated to the measurement of the 
genset current. The alarm detection time (td) ts the curve given by the formula:
where the time constant parameter T is dened in seconds (Times table, 
parameter 34, default value 36 seconds) and a percentage of the maximum 
overload current of genset I (Thresholds table, parameter 51, default value 
200%). With these default values, the base of dened times is equal to one hour 
for a circulating current corresponding to 110% of the genset’s overload threshold 
(Thresholds table, parameter 7).
The purpose of the IDMT alarm is to avoid heating as a result of the ow of 
current in the installation components (contactors, cables etc.). Therefore, the 
trip time of the alarm is a function of the current owing where a higher current in 
the genset corresponds to a shorter alarm trip time. In addition, this condition 
implies that the IDMT alarm can trip repeatedly in less time than is established 
(Times table, parameter 34) as a result of not being given sufcient cooling time 
when the genset current is below the overload current threshold.
The cooling time is determined by the formula:
Detection of the IDMT alarm is set by default (Alarms table, parameter 180) to 
be activated: Never.
Once an IDMT alarm has been generated, the genset current must be less than 
the nominal current dened by the IDMT curve (Thresholds table, parameter 51) 
for a programmable interval of time (debounce) (Alarms table, parameter 181).
The genset power alarm is set by default (Alarms table, parameter 182) to 
perform no action (warning).
Value 0 for the time constant (Times table, parameter 34) or nominal current 
(Thresholds table, parameter 51) of the IDMT curve disable the management of 
this alarm.




MAINTENANCE  |  PAGE 47
7. MAINTENANCE
7.1 OPERATION COUNTERS
The CEM7 control unit records different accumulated readings related to control 
unit operation. The counters that record the control unit are:
 • Total operating hours counter. The control unit records the number of 
hours that the genset engine has been operating. The total operating 
hours counter cannot be reset to zero.
 • Partial operating hours counter. The control unit records the number 
of hours that the genset engine has been operating. The partial 
operating hours counter can be reset to zero.
 • Correct starts counter. The control unit counts the number of correct 
starts performed by the control unit. The correct starts counter can 
be reset to zero.
 • Failed starts counter. The control unit counts the number of failed 
starts performed by the control unit. The failed starts counter can be 
reset to zero.
 • Total energy counter. The control unit counts the total energy 
produced by the genset in MWh. The total energy counter cannot be 
reset to zero.
 • Partial energy counter. The control unit counts the total energy 
produced by the genset in MWh. The partial energy counter can be 
reset to zero.
 • Daily energy counter (timer option required). The daily energy counter 
calculates the energy generated by the genset from 00:00 on the 
current day until the moment the reading is displayed. With the 
change of day, the energy accumulated during the day is added to the 
monthly energy counter and the daily energy counter is reset to zero.
 • Monthly energy counter (timer option required). The monthly energy 
counter calculates the energy generated by the genset from day 1 of 
the current month until the day before the reading is displayed. With 
the change of month, the energy accumulated is added to the annual 
energy counter and the monthly energy counter is reset to zero.




MAINTENANCE  |  PAGE 48
Display. The remaining operating time before a maintenance alarm is generated 
is displayed in the Counters menu->Maint.#1 in hours and minutes.
Notification. To report the maintenance alarm, it must be programmed from the 
Counters menuMaint.#1 pressing the key and writing any value other than 
zero.
Cancelation. To cancel the ongoing maintenance counter it must be programmed 
from the Counters menuMant.#1, Mant.t#2 and Rental pressing the key and 
writing zero in hours.
7.3 LIST OF PREVIOUS ERRORS
The CEM7 control unit keeps a record of the detected alarms saving the status 
of the control unit when they occurred
The CEM7 control unit stores the last 10 errors detected. With the timer option, 
the list of previous errors is increased to store the last 100 errors as well as and 
the date and time when the error occurred.
7.4 LIST OF EQUIPMENT
7.4.1 INFORMATION ON THE LIST OF EQUIPMENT
The CEM7 control unit allows the identication and monitoring of all the electronic 
devices currently connected to the control unit. To do this, access the menu 
Parameters->List of Equipment. Via this menu item, a list appears of all the 
electronic equipment for measurements (PHR6/7 and PHG6/7) and display 
(CEM7, CEA7, CEA7CC2 and CEA7CC2.2) currently connected, with an asterisk 
() indicating the module from which the list of equipment is being viewed.
The information relating to this equipment includes:
 • The electronic module model
 • The electronic module ID number (from 0 to 14)
 • The rmware version 
 • Annual energy counter (timer option required). The annual energy 
counter calculates the energy generated by the genset from the 1st 
of January until the month before the reading is displayed. With the 
change of year, the annual energy counter is reset to zero.
To display the value of the counters, it is necessary to access them from the 
Main Menu 3Counters.
The partial counters can be reset by highlighting the counter using the up and 
down scroll keys and holding down the reset button for 5 seconds.
7.2 MAINTENANCE COUNTERS
The CEM7 control unit has 3 programmable counters that are loaded for a certain 
time which decreases while the engine is detected as running. The maintenance 
counters are:
 • 2 engine maintenance counters. When the counters reach zero an 
engine alarm is generated without stopping. The alarm disappears 
when the associated counter is reset. An engine running time that 
exceeds the programmed maintenance counter is shown ashing 
on the interface of the control unit with the “-” sign in front of the 
counter value.
 • 1 rental counter. The counter generates an alarm that can make the 
engine stop. The alarm disappears when the rental counter is reset. 
An engine running time that exceeds the programmed rental counter 
is shown ashing on the interface of the control unit with the “-” sign 
in front of the counter value.
The operation of the maintenance counters allows:
Programming. The maintenance counter is programmed from the Counters 
menuMaint.#1, Maint.#2 and Rental. By pressing the key the different 
operating time values in hours are reset. In the case of the rental counter, after 
programming the operating hours limit, the alarm mode must be entered; the 
following values are allowed:
 • 0: warning
 • 1: stop without cooling
 • 2: stop with cooling




MAINTENANCE  |  PAGE 49
7.6 PROGRAMMING ANALOGUE SENSORS CURVE
The CEM7 control unit has a series of temperature and pressure sensors curves 
programmed for different VDO capsule types (model 323-803-001-008 for 
temperature and model 360-081-030-009 for pressure) and engines (VOLVO, 
JCB, SCANIA, YANMAR). Via parameter 29 on the Regulations table the type of 
sensor installed on the generator set is selected.
In addition to the programmed curves, there are two sensors curves (one for 
temperature and the other for pressure) with up to 8 points, each congurable by 
the user.
To program these curves from the option MenuParametersSensors, it is 
necessary to:
1. There are a maximum of 8 points for each programmable curve.
2. With ohm values for the resistance value of the sensor curve. The resistance 
values of the sensor response curve must be entered in descending order, that 
is, the rst point should correspond to the highest resistance value, the second 
point to the second highest resistance value, and so on. Only positive resistance 
values are permitted when programming the sensors curve points.
3. The temperature values of the sensors curve points must be entered in 
degrees Celsius. Positive and negative temperature values are permitted when 
programming the sensors curve points.
4. The pressure values of the sensors curve points must be entered in 
kilopascals. Only positive pressure values are permitted when programming the 
sensors curve points.
5. The temperature curve can be applied to both the coolant temperature sensor 
and the auxiliary sensor (by default, oil temperature).
6. The pressure curve is applied to the oil pressure sensor.
 • For the display modules (CEM7, CEA7, CEA7CC2 and CEA7CC2.2), 
the associated measuring equipment is indicated in brackets. For 
display modules (CEM7 and CEA7), the Master display module 
must have the same ID as the associated measurement module. 
For repetitive display modules, the module must have a different 
ID than the master display and must be associated to the same 
measurements module. For switching control unit display modules 
(CEA7CC2 and CEA7CC2.2) the display module must have the same 
ID as the measurements module of the associated switching control 
unit and in brackets the ID of the genset measurements module to 
which the manual control unit is associated.
NOTE
It is NOT permitted to have similar modules (PHG6/7 and PHR6/7; CEM7 and 
CEA7; CEA7CC2 and CEA7CC2) with the same ID. If during start up a display 
module detects another analogue module with the same ID, the message will be 
displayed ERROR ID. DISPLAY.
NOTE
By changing the ID of a module, it automatically restarts. It is important to NOT 
change the ID of measurements modules with the genset in operation.
7.4.2 ALLOCATION OF IDS
Because all the electronic modules have the ID 0 by default, for the 
implementation of installations with multiple control units interconnected, it is 
necessary to assign IDs to the various modules. For this purpose, it is necessary 
to progressively switch on the various control units, assigning each of them 
different IDs as they are connected.
7.5 RESETTING THE CURRENT MEASUREMENTS
In the event of an incorrect current reading when the genset is uncharged, it is 
possible to perform a zero calibration (Table Measures, parameters 6, 8 and 10: 
any of the 3 perform the resetting of the 3 current channels) of the Measurements 
table.




MAINTENANCE  |  PAGE 50
7.7 PROGRAMMING THE GAUGE RESPONSE CURVE
The CEM7 control unit allows the use of nonlinear response gauges for measuring 
fuel. To this end, in addition to the response curves of the temperature and 
pressure sensors, additional curves can be programmed for the fuel level 
sensors with up to 8 congurable points for each user. The rst programmable 
curve corresponds to the fuel level input (NC) for a nonlinear response. The 
second programmable curve permits a gauge for an auxiliary tank at the input 
(AnC).
To program these curves from the option MenuParametersSensors, it is 
necessary to:
1. There are a maximum of 8 points for each programmable curve.
2. With ohm values for the resistance value of the sensor curve. The resistance 
values of the sensor response curve must be entered in descending order, that 
is, the rst point should correspond to the highest resistance value, the second 
point to the second highest resistance value, and so on. 
3. To program the response curve, the gauge must be positioned at various 
points. For each position, the control unit automatically obtains the sensor 
resistance value; the user must program the % lling level of the tank between 0 
and 100%.
4. The rst programmable fuel curve corresponds to the generator set's main 
fuel sensor. This curve is used for gauges with nonlinear responses that need 
more than 2 points for programming. If the CEM7 control unit detects a curve 
programmed in the rst fuel curve, it cancels the parameters corresponding to 
the linear calibration of the generator set's main gauge (Measurements table, 
parameters 12 and 13 ).
5. The second programmable fuel curve corresponds to the generator set's 
auxiliary fuel sensor. If the CEM7 control unit detects a curve programmed in the 
second fuel curve, an auxiliary analogue input is assigned to that measurement.




OPTIONS  |  PAGE 51
8. OPTIONS (EXPANSIONS)
New functions can be added to the CEM7 control unit using the CAN bus 
connection via expansion modules. 
8.1 DISPLAY SCREEN (REPETITIVE)
The control units CEA7 and CEM7 allow display screens to be added to the 
installation. This device displays the current status of the control unit, and if it is 
in automatic mode, can control the functioning of the genset. The display screen 
does not allow the master control unit mode to be changed. 
Also, the display screen shows the status of the control unit via error and status 
LEDs and the programming of operating parameters.




OPTIONS  |  PAGE 52
2. Once space is freed for installing the timer, place the timer in the appropriate 
connection position (see connection pins) and apply pressure for complete 
installation. 
3. It will be slightly elevated so that it can be accessed easily.
8.3 TELESIGNAL
The CEM7 control unit allows connection of a Telesignal device. The Telesignal 
device has 12 relay outputs (4 with NO and NC contact, 8 with NO contact).
8.2 TIMER
The timer device informs the control unit of the current date and time. This device 
allows the weekly programming of:
 • Scheduled starts
 • Scheduled locks
 • Scheduled engine tests and maintenance
 • Expansion of the list of previous errors (Increasing the list by an 
additional 100 errors to the 10 incorporated into the control unit by 
default and provides information regarding the date and time at which 
the detected error occurred).
 • Energy counters (day, month, year)
The maximum timer limit is 5 daily programs. The CEM7 control unit must be in 
automatic mode in order to manage the incorporated programming.
INSTALLATION ON THE DISPLAY MODULE
The timer is incorporated into the rear of the CEM7 control unit's display module 
simply and accurately. 
1. Cut the parts already envisaged on the control unit (lower right side).




OPTIONS  |  PAGE 53
The engine condition transmitted by the CIU through the J1939 communication 
bus is displayed through the INPUT/OUTPUT screen if it is detected that the 
J1939 extension is installed or option CEM7J.
Also, 2 new screens are incorporated with option 9 on the MENU screen:
1. Display screen of engine errors: on this screen the list of previous active and 
passive errors detected by the engine regulation is displayed. On the initial 
screen a complete list is displayed of the errors detected. When accessing using 
the accept key, for each error the following is displayed:
 • Error code
 • Hours engine running when the error occurred
 • If it is an active or passive error
 • Flashing code associated to the error
Through password level 3, it is possible to clear the list of passive errors stored 
in the electronic regulation of the engine.
2. Only expansion CCJ1939: Display screen for control unit starts via the J1939 
extension in autonomous mode. The J1939 extension allows an autonomous 
operating mode through which it is possible to start and stop the engine 
independently of the control unit. These starts are recorded in the J1939 
extension together with the engine running hours of the electronic regulation.
The outputs of the Telesignal device can be programmed to be activated 
depending on:
 • Any active alarm or pending notication from the control unit
 • Any active input of the control unit
 • Any active output of the control unit
 • Control unit mode (Automatic or manual)
Each output of the Telesignal device is activated when at least one of the 
activation conditions have been programmed.
8.4 CCJ1939/CEM7J
Both the CEM7J option and the CEM7 control unit with the expansion CCJ1939 
can monitor the following engine operating parameters depending on the 
manufacturer and model:
 • Measurements of pressure, temperature
 • Engine alarms
 • Engine error codes
 • Start and stop operations
 • Fine adjustment of speed via parameters
 • Only expansion CCJ1939: speed adjustment by analogue input from 
0-10V (synchronization)
 • Only control unit CEM7J with expansion CCRS MODBUS: External 
engine speed control via MODBUS
 • Engine command via protocol J1939 (CIU mode):
- Engine start-up and stop by J1939 frame
- Override operational mode (forced running)
- Engines:
TEDOM: replacement HMI TEDOM
SCANIA: replacement CiU
IVECO TIER3: is compatible with the TIER2 communication 
frame
ALL: Start-up and stop via CAN frame




OPTIONS  |  PAGE 54
8.5 CC/LAN
The CEM7 control unit allows the connection of a CCLan device for remote 
connection using TCP/IP connections. The CCLan device allows the following:
 • Remote monitoring and control via a TCP/IP connection as well as 
monitoring and conguration applications.
 • Remote monitoring via Web page (CCLAN IP expansion).
 
8.6 SECOND ZERO SUPPRESSION
Second Zero Suppression expansion allows synchronization of amplitude, phase 
and frequency of the genset signal and the network signal, avoiding service 
interruption when the network returns. It also has 4 digital inputs for 
programmable functions (Settings table) and 2 digital outputs for programmable 
functions (Settings table) and an analogue input for reading voltage in a second 
battery used to support the generator set.
8.7 ANNOUNCEMENT PANEL
The CEM7 control unit allows the connection of an announcement panel device 
that can implement an interface with the user based on 16 LEDs each one of 
which can be associated with one of the following states of the CEM7 control unit:
 • Alarms
 • Status of the inputs
 • Status of the outputs
 • Mode of operation of the control unit
 • Status of the control unit
8.8 MODBUS CC/LAN
The CEM7 control unit allows connection of a CCLan MODBUS device for remote 
connection using TCP/IP connections over MODBUS protocol.
8.9 MODBUS CCRS485
The CEM7 control unit allows connection of a CCLan CCRS485 device for remote 
connection using RS485 connections over MODBUS protocol.
8.10 CCRS232
The CEM7 control unit allows the connection of a CCRS232 device together with 
a MODEM RTB or GPRS for remote management of the generator set using 
telephone network connections.




OPTIONS  |  PAGE 55
8.11 ANALOGUE INPUTS EXPANSION PT100
The CEM7 control unit allows the connection of a CPT100 device for measuring 
up to 4 temperature probes for display and management of the generator set 
alarms.
8.12 PRECISION GAUGE EXPANSION
The CEM7 control unit allows the connection of a precision gauge device for 
measuring the level in fuel tanks.
8.13 SNMP CCLAN
The CEM7 control unit allows the connection of a SNMP CCLan device for 
management via the use of SNMP protocol.




(APPENDIX I) PARAMETERS TABLE  |  PAGE 56
9. APPENDIX I: PARAMETERS TABLE
The CEM7 control unit allows 3 levels of access for settings. To modify any of the 
CEM7 control unit's parameters validation is required by entering the correspond-
ing password. The 3 levels of access are:
1. User. Allows level 1 values to be read. (Default password: 1111).
2. Maintenance. Allows level 1 and level 2 parameters to be written. (Default 
password: 1911).
3. Supervisor. Allows level 1, 2 and 3 parameters to be written. (Restricted val-
ue, for use only by manufacturer).




(APPENDIX I) PARAMETERS TABLE  |  PAGE 57
Parameter PSW Description
Default 
value
Range
20 2 Filtering of the ENT5 input 1.0’’ 0.0’’.. 120.0’’
22 2 Filtering of the ENT1 input 1.0’’ 0.0’’.. 120.0’’
23 2 Filtering of the ENT2 input 1.0’’ 0.0’’.. 120.0’’
24 2 Filtering of the ENT3 input 1.0’’ 0.0’’.. 120.0’’
26 2 Dummy load power detection time 5 ’’ 1’’..3000’’
27 2 Load starting power detection time 5 ’’ 1’’..3000’’
28 2 Free -
29 2 Free -
30 2 Gas Ignition activation delay time 3 ’’ 0’’..100’’
31 2 Gas valve activation delay time 1 ’’ 0’’..10’’
32 2 Gas Ignition deactivation delay time 1 ’’ 0’’..10’’
Table 2 
Measurements Table
Parameter PSW Description
Default 
value
Range
1 2
Current transformers conversion factor. Factor com-
mon to RMS current values IR, IS, IT
100
6 
8 
10
2
Regulation zero current
Current reading set to zero.
12 2 Fuel Level Regulation EMPTY
13 2 Fuel Level Regulation FULL
Table 1 
Times Table
Parameter PSW Description
Default 
value
Range
1 2 Number of Starts 4 1..10
2 2
Time between Starts
Period between starts during which all the outputs 
are disabled.
5 ’’ 3’’..15’’
3 2
Start Delay
Time between power failure and engine start.
0 ’’ 0’’..1800’’
4 2 Spark Plugs Preheating Time 0 ’’ 0’’..180’’
5 2
Startup Time
Maximum waiting time before startup has been 
achieved. During this period the starting output is 
active.
5 ’’ 1’’..30’’
6 2
Charging Activation Time
Time from the moment the starting of the motor is 
detected until the activation of the genset contactor.
3 ’’ 1’’..600’’
7 2
Nominal condition time
Time from the moment the starting of the motor is 
detected until the quality of the signal generated 
begins to be validated
2” 2”..15”
8 2
Activation time of D+
At the end of this time, the voltage level at the DI 
input will be checked and the D+ output will remain 
active or not until the engine stops depending on the 
Regulations parameter (3). 
3 ’’ 1’’..10’’
9 2 Delay time for the activation of EJP1 1” 1”..1800”
11 2 Cooling Time 120’’ 2’’..1800’’
12 2 PE activation time 10’’ 1’’..30’’
13 2 Contactor detection time 5 ’’ 1’’..3000”
14 2
Maximum alarm activation time
The alarm output is activated (together with the 
ashing of the reset and buzzer LED on the display) 
when appropriate during this time limit.
15”
0-Indenite
1”..1800”
15 2 Filtering of the RC input 1.0’’ 0.0’’..5.0’’
16 2 Filtering of the BPA input 1.0’’ 0.0’’..5.0’’
17 2 Filtering of the ATA input 1.0’’ 0.0’’..5.0’’
18 2 Filtering of the NA input 1.0’’ 0.0’’..5.0’’
19 2 Filtering of the ENT4 input 1.0’’ 0.0’’..120.0’’




(APPENDIX I) PARAMETERS TABLE  |  PAGE 58
Parameter PSW Description
Default 
value
Range
19 2 Phase voltage as starting condition 3
0- No consultation
1- Motor started
2- Motor stopped
3- Motor started/stopped
20 2 Alternator voltage as starting condition 1
21 2 PICK-UP input as starting condition. 3
22 2 BPA input as starting condition 2
23 2 Voltage transformer 0
0- Not installed
1- Transformer 400/600
24 2 Position of current measured. 0
0- Unit panel
1- Output line
25 3 Management of forced operation 0
0- Not permitted
1- Starting due to network 
failure
2- Starting due to forced 
operation.
26 2
Ratio engine ywheel ring gear speed 
and genset voltage frequency
0
0-50 Hz / 1500 rpm
60 Hz / 1800 rpm
1-50 Hz / 3000 rpm
27 2 Temperature display 0
0-Celsius
1-Fahrenheit
28 2 Pressure display 0
0-Bars
1-Psi
29 3 Type of analogue sensors 0
See table 
Analogue sensors
30 2 Selection of control unit type 0
0-Manual
1-Automatic
31 2
External start conguration
(display: ver. 4.46; measurements ver. 
4.00 or higher)
0
0-Alarm delay
1-Immediate start
2-Delay without AL output 
activation
3-Immediate start without AL 
activation
NOTE
After modifying parameter 30 the control unit must be reset by disconnecting its 
power, to allow the updating of its operating mode.
Table 3 
Regulations Table
Parameter PSW Description
Default 
value
Range
1 2 Fuel transfer pump operating mode 3
0-Off
1-Manual
2-Automatic
3-Control unit mode/
Combined mode
2 2 Default Starting Mode 1
0-Locked
1-Manual
2-Automatic
3-Test
3 2 Deactivation of D+ 0
0-Alternator 
1-Dynamo
4 2 Conguration of the LV relay output 1
0-Inhibited
1-Fuel transfer pump
2-Heating resistance
3-Thermal protection
5 2 Conguration of the RC input 1
0-OFF
1- Normally open
2- Normally closed
6 2 Conguration of the BPA input 1
7 2 Conguration of the ATA input 1
8 2 Conguration of the NA input 1
9 2 Conguration of the ENT4 input 1
10 2 Conguration of the ENT5 input 1
11 2 Conguration of the PEM input 2
12 2 Conguration of the ENT1 input 1
13 2 Conguration of the ENT2 input 1
14 2 Conguration of the ENT3 input 1
15 2 Conguration of the SETA1/PC input 2
16 2
Input associated with the AUX1 LED on 
the display module
0
0- Not programmed
1- RC
2- BP
3- AT
4- NA
5- ENT4
6- ENT5
7- PE
8- ENT1
9- ENT2
10- ENT3
17 2
Input associated with the AUX2 LED on 
the display module
0
18 2
Conguration of the preheating and cong-
urable stop outputs
0
0- PD/PR
1- PE/PR
2- PD/PE
3- PULL/HOLD
4- GAS





(APPENDIX I) PARAMETERS TABLE  |  PAGE 59
Table 6
External start-up configuration table. Related to parameter 31 in the regulations table
Fitting property
Value
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Immediate start-up
ѵ ѵ ѵ ѵ ѵ ѵ ѵ ѵ
AL Output disabling
ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

Genset in reserve
ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

AL acoustic output
ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

ѵ

Table 7
Thresholds Table
Parameter PSW Description
Default 
value
Range
1 2 Electrical conguration of the alternator 1
0- Three-phase 
without neutral
1- Three-phase
2- Two-phase
3- Single-phase
4- Delta
5- Delta without 
neutral
6- Two-phase 
selector
2 2 Maximum Unit Voltage 440V
3 2 Minimum Unit Voltage 360V
4 2 Maximum asymmetry value of the genset 80V
5 2 Maximum Unit Frequency 58Hz
6 2 Minimum Unit Frequency 45Hz
7 2 Maximum generator current 1000 Amps
8 2 Short circuit detection 3000 Amps
9 2 Nominal Power of the genset 200 kW
10 2 Maximum Reverse Power 10% 0-20%
11 2 Maximum PICK UP Speed 1740 rpm
12 2 Minimum PICK UP Speed 1350 rpm
17 2 Minimum battery voltage 8V (16V) 8-23
18 2 Fuel transfer pump: Minimum fuel level 30% 5%-90%
19 2 Fuel transfer pump: Maximum fuel level 80% 10%-100%
20 2 Starting voltage in the genset signal 40V 30-100
21 2 Starting voltage in the alternator 8V (21V) 6-23
Table 4 
Analogue sensors. Related to parameter 29 in the Regulations table
Value Coolant temperature Oil pressure Oil temperature
0 VDO: 323-803-001-008 VDO: 360-081-030-009
PHG7
rev 4.14 and previous:
VDO: 323-803-001-008 
rev 4.15 and subse-
quent:
VDO: 323-801-012-00
PHG7J
VDO: 323-801-012-00
1 SCANIA SCANIA
2 Yanmar Yanmar
3 JCB VDO: 360-081-030-009
4 VOLVO VOLVO
5 Programmable 1 Programmable 2
6 Programmable 1 VDO: 360-081-030-009
7 VDO: 323-803-001-008 Programmable 2
8 KUS KUS
16 VDO: 323-803-001-008 VDO: 360-081-030-009
Programmable 1
17 SCANIA SCANIA
18 Yanmar Yanmar
19 JCB VDO: 360-081-030-009
20 VOLVO VOLVO
21 Programmable 1 Programmable 2
22 Programmable 1 VDO: 360-081-030-009
23 VDO: 323-803-001-008 Programmable 2
24 KUS KUS
Table 5
Point curve of auxiliary sensor VDO 323-801-012-00
Point Resistance Temperature
1 740 30
2 322 50
3 155 70
4 112 80
5 71 95
6 41 115
7 23 140
8 10 180




(APPENDIX I) PARAMETERS TABLE  |  PAGE 60
Table 8 
Alarms Table
Parameter PSW Description Default value Range
1 3
Management alarm 0
High Water Temperature
1
0- Not checked
1- Always checked
2- When starting
3- From start condition 
(Stabilised)
4- From nominal condition (In 
operation)
2 3 Delay alarm 0 0 ’’ 0”…255”
3 3 Mode alarm 0 1
0- Not for engine
1- For engine
2- For engine with cooling
4
3
Management alarm 1
Low oil pressure
4 0..4
5 3 Delay alarm 1 15’’ 0”…255”
6 3 Mode alarm 1 1 0..2
10 2
Management alarm 3
Battery Alternator failure
3 0..4
11 2 Filter alarm 3 5 ’’ 0”…255”
12 2 Mode alarm 3 0 0..2
16 3
Management alarm 5
Low Water Level
1 0..4
17 3 Delay alarm 5 5 ’’ 0”…255”
18 3 Mode alarm 5 1 0..2
19 2
Management alarm 6
Fuel Reserve
1 0..4
20 2 Delay alarm 6 5 ’’ 0”…255”
21 2 Mode alarm 6 0 0..2
22 2
Management alarm 7
Overspeeding
4 0..4
23 2 Filter alarm 7 5 ’’ 0”…255”
24 2 Mode alarm 7 1 0..2
25 2
Management alarm 8
Under Speed
4 0..4
26 2 Filter alarm 8 15” 0”…255”
27 2 Mode alarm 8 2 0..2
28 2
Management alarm 9
Overload
4 0..4
29 2 Filter alarm 9 15” 0”…255”
30 2 Mode alarm 9 2 0..2
Parameter PSW Description
Default 
value
Range
22 2 Starting speed (PICK UP) 1000 rpm 300-1000
24 2 Engine ywheel teeth 0 0-300
25 2 Low fuel level 10% 0..30
26 2 Low oil pressure threshold 1.2 bar 0.5-3
27 2 High water temperature threshold 98ºC 80-105
28 2 Low engine temperature by sensor OFF OFF(0ºC)-40ºC
29 2 Minimum heating temperature 25ºC 5 - 30 ºC
30 2 Maximum heating temperature 35ºC 10 - 40 ºC
31 2 Minimum auxiliary battery voltage 8 5-40
32 2 Dummy load activation power  0KW
0: Disabled
1...10000
33 2 Dummy load deactivation power  0KW
0: Disabled
1...10000
34 2 Starting activation power by load demand 0KW
0: Disabled
1...10000
35 2 Starting deactivation power by load demand 0KW
0: Disabled
1...10000
36 2 Maximum battery voltage 32 8-40
37 2 Minimum battery voltage when starting 10 8-23
38 2 Percentage of maximum genset power 90 0-110%
39 2 Maximum temperature of external probe 1 0 0-250ºC
40 2 Maximum temperature of external probe 2 0 0-250ºC
41 2 Maximum temperature of external probe 3 0 0-250ºC
42 2 Maximum temperature of external probe 4 0 0-250ºC
43 2
Maximum temperature level 2 of external 
probe 1
0 0-250ºC
44 2
Maximum temperature level 2 of external 
probe 2
0 0-250ºC
45 2
Maximum temperature level 2 of external 
probe 3
0 0-250ºC
46 2
Maximum temperature level 2 of external 
probe 4
0 0-250ºC
47 2
Maximum current of neutral
(only CEP7)
0 0..100A
48 2 Cut-off temperature of preheating 0
0-Cut-off  
disabled
1..125ºC




(APPENDIX I) PARAMETERS TABLE  |  PAGE 61
Parameter PSW Description Default value Range
60 2 Mode alarm 19 2 0..2
61 2
Management alarm 20
Minimum Unit Voltage
3 0..4
62 2 Filter alarm 20 8” 0”…255”
63 2 Mode alarm 20 2 0..2
64 2
Management alarm 21
Minimum Unit Frequency
3 0..4
65 2 Filter alarm 21 8” 0”…255”
66 2 Mode alarm 21 2 0..2
70 2
Management alarm 23
Stop failure
1 0..1
71 2 Filter alarm 23 5 ’’ 0”…255”
73 2
Management alarm 24
Low Engine Temperature
0 0..4
74 2 Filter alarm 24 15’’ 0”…255”
75 2 Mode alarm 24 0
0- Not CG limited
1- CG limited
76 2
Management alarm 25
Unit signal failure
3 0..4
77 2 Filter alarm 25 2” 0”…255”
78 2 Mode alarm 25 2 0..2
79 2
Management alarm 26
Programmable alarm 1
0 0..4
80 2 Delay alarm 26 0’ 0”…255”
81 2 Mode alarm 26 0 0..2
82 2
Management alarm 27
Programmable alarm 2
0 0..4
83 2 Delay alarm 27 0’ 0”…255”
84 2 Mode alarm 27 0 0..2
85 2
Management alarm 28
Programmable alarm 3
0 0..4
86 2 Delay alarm 28 0’ 0”…255”
87 2 Mode alarm 28 0 0..2
102 2
Management alarm
Unit contactor alarm
0 0..1
111 2
Management alarm extension 1
Programmable alarm 4 (from 
version PHG6/7 v250)
0 0..4
112 2 Delay alarm extension 1 0’ 0”…255”
113 2 Mode alarm extension 1 0 0..2
Parameter PSW Description Default value Range
31 2
Management alarm 10
Asymmetry
3 0..4
32 2 Filter alarm 10 8” 0”…255”
33 2 Mode alarm 10 2 0..2
34 2
Management alarm 11
Maximum Unit Voltage
3 0..4
35 2 Filter alarm 11 5 ’’ 0”…255”
36 2 Mode alarm 11 1 0..2
37 2
Management alarm 12
Maximum Unit Frequency
4 0..4
38 2 Filter alarm 12 1 ’’ 0”…255”
39 2 Mode alarm 12 1 0..2
40 2
Management alarm 13
Incorrect Phases Sequence
4 0..4
41 2 Filter alarm 13 8” 0”…255”
42 2 Mode alarm 13 2 0..2
43 2
Management alarm 14
Reverse Power
4 0..4
44 2 Filter alarm 14 15” 0”…255”
45 2 Mode alarm 14 2 0..2
46 2
Management alarm 15
Low battery voltage
1 0..4
47 2 Filter alarm 15 15” 0”…255”
48 2 Mode alarm 15 0 0..2
49 2
Management alarm 16
High Water Temperature (by 
sensor)
1 0..4
50 2 Filter alarm 16 5 ’’ 0”…255”
51 2 Mode alarm 16 0 0..2
52 2
Management alarm 17
Low oil pressure (by sensor)
3 0..4
53 2 Filter alarm 17 5 ’’ 0”…255”
54 2 Mode alarm 17 0 0..2
55 2
Management alarm 18
Low fuel level (by sensor)
1 0..4
56 2 Filter alarm 18 5 ’’ 0”…255”
57 2 Mode alarm 18 0 0..2
58 2
Management alarm 19
Short Circuit
4 0..4
59 2 Filter alarm 19 __




(APPENDIX I) PARAMETERS TABLE  |  PAGE 62
Parameter PSW Description Default value Range
140 2 Mode alarm probe 3 0 0..2
141 2
Management alarm probe 4
Temperature probe 4
(from version PHG7 v419)
0 0..4
142 2 Filter alarm probe 4 5’ 0”…255”
143 2 Mode alarm probe 4 0 0..2
144 2
Management alarm J1939
Communication engine
(only expansion PHG7J)
4 0..4
145 2 Filter alarm J1939 1’ 0”…255”
146 2 Mode alarm J1939 0 0..2
147 2
Management alarm probe 1 
level 2
Temperature probe 1 level 2
(from version PHG7 v420)
0 0..4
148 2
Filter alarm probe 1 level 2
5’ 0”…255”
149 2
Mode alarm probe 1 level 2
0 0..2
150 2
Management alarm probe 2 
level 2
Temperature probe 2 level 2
(from version PHG7 v420)
0 0..4
151 2 Filter alarm probe 2 level 2 5’ 0”…255”
152 2 Mode alarm probe 2 level 2 0 0..2
153 2
Management alarm probe 3 
level 2
Temperature probe 3 level 2
(from version PHG7 v420)
0 0..4
154 2 Filter alarm probe 3 level 2 5’ 0”…255”
155 2 Mode alarm probe 3 level 2 0 0..2
156 2
Management alarm probe 4 
level 2
Temperature probe 4 level 2
(from version PHG7 v420)
0 0..4
157 2 Filter alarm probe 4 level 2 5’ 0”…255”
158 2 Mode alarm probe 4 level 2 0 0..2
Parameter PSW Description Default value Range
114 2
Management alarm extension 2
Programmable alarm 5
(from version PHG6/7 v250)
0 0..4
115 2 Delay alarm extension 2 0’ 0”…255”
116 2 Mode alarm extension 2 0 0..2
117 2
Management alarm extension 3
Auxiliary battery alarm
(from version PHG6/7 v250)
0 0..4
118 2 Filter alarm extension 3 0’ 0”…255”
119 2 Mode alarm extension 3 0 0..2
120 2
Management alarm NFPA 
High battery voltage
(from version PHG6 v300)
0 0..4
121 2 Filter alarm NFPA 1 0’ 0”…255”
122 2 Mode alarm NFPA 1 0 0..2
123 2
Management alarm extension 3
Low battery voltage when start-
ing
(from version PHG6 v300)
0 0..4
124 2 Filter alarm NFPA 2 0’ 0”…255”
125 2 Mode alarm NFPA 2 0 0..2
129 2
Management alarm extension 4
Unit power
(from version PHG7 v419)
4 0..4
130 2 Filter alarm extension 4 5’ 0”…255”
131 2 Mode alarm extension 4 0 0..2
132 2
Management alarm probe 1
Temperature probe 1
(from version PHG7 v419)
0 0..4
133 2 Filter alarm probe 1 5’ 0”…255”
134 2 Mode alarm probe 1 0 0..2
135 2
Management alarm probe 2
Temperature probe 2
(from version PHG7 v419)
0 0..4
136 2 Filter alarm probe 2 5’ 0”…255”
137 2 Mode alarm probe 2 0 0..2
138 2
Management alarm probe 3
Temperature probe 3
(from version PHG7 v419)
0 0..4
139 2 Filter alarm probe 3 5’ 0”…255”




(APPENDIX I) PARAMETERS TABLE  |  PAGE 63
Parameter PSW Description
Default 
value
Range
6 2 Input associated to CKG mode 0
0- Not programmed
2- BPA (option CEM7J)
3- ATA (option CEM7J)
4- NA (option CEM7J)
5- ENT4
6- ENT5
8- ENT1
9- ENT2
10- ENT3
17- Extension ENT1
18- Extension ENT2
19- Extension ENT3
20- Extension ENT4
7 2 Input associated to EJP1 mode 0
8 2 Input associated to EJP2 mode 0
9 2 Input associated to IA mode 6
10 2 Input associated to AE mode 5
11 2 Input associated to TEST mode 0
12 3 Input associated to MFOR mode 0
13 2 Input associated to AL1 mode 0
14 2 Input associated to AL2 mode 0
15 2 Input associated to AL3 mode 0
16 2 Input associated to S1 mode 0
17 2 Input associated to S2 mode 0
Table 10 
Settings Table (I/O). Extension from version PHG6/7v250
Parameter PSW Description
Default 
value
Range
18 2
Programmable Output Mode 4
(necessary Second
 Zero expansion)
0
0- Not programmed
1- RC Input
2- BP Alarm
3- AT Alarm
4- NA Input
5- ENT4 Input
6- ENT5 Input
7- PE Alarm
8- ENT1 Input
9- ENT2 Input
10- ENT3 Input
11- Heating resistance
12- Block mode
13- Manual mode
14- Auto mode
15- Test mode
16- Alternator alarm
17- Prg. alarm 1
18- Prg. alarm 2
19- Prg. alarm 3
20- AL4
21- AL5
22- Dummy load
23- Thermal protection
24- Load demand
19 2
Programmable Output Mode 5
(necessary Second 
Zero expansion)
0
20 2
Programmable Output Mode 6
(necessary Second 
Zero expansion)
0
21 2
Programmable Output Mode 7
(necessary Second 
Zero expansion)
0
Table 9 
Settings Table (I/O)
Parameter PSW Description
Default 
value
Range
1 2 Programmable Output Mode 1 0
0- Not programmed
1- RC Input
2- BP Alarm
3- AT Alarm
4- NA Input
5- ENT4 Input
6- ENT5 Input
7- PE Alarm
8- ENT1 Input
9- ENT2 Input
10- ENT3 Input
11- Heating resistance
12- Block mode
13- Manual mode
14- Auto mode
15- Test mode
16- Alternator alarm
17- Prg. alarm 1
18- Prg. alarm 2
19- Prg. alarm 3
20- AL4
21- AL5
22- Dummy load
23- Thermal protection
24- Load demand
25- HOLD Control engine
gas valve
29- Unit contactor status
30- Network contactor status
(only automatic control unit)
31- Watchdog
32..95- Unit alarm (see Table of 
Programmable output genset alarms 
allocation )
2 2 Programmable Output Mode 2 0
3 2 Programmable Output Mode 3 0
4 2 CR Programmable Output Mode 0




(APPENDIX I) PARAMETERS TABLE  |  PAGE 64
Table 12 
Parameters clearance selector Table
Parameter PSW Description
Default 
value
Range
1 2 Signal type clearance 1 1
0- Three-phase without 
neutral
1- Three-phase
2- Two-phase
3- Single-phase
4- Delta with neutral
5- Delta without neutral
6- Two-phase selector
2 2 Maximum Unit Voltage clearance 1 440V
3 2 Minimum Unit Voltage clearance 1 360V
4 2 Maximum generator current clearance 1 1000A
5 2 Short circuit detection clearance 1 3000A
6 2 Maximum Unit Frequency clearance 1 58Hz
7 2 Minimum Unit Frequency clearance 1 45Hz
8 2 Signal type clearance 2 1
0- Three-phase without 
neutral
1- Three-phase
2- Two-phase
3- Single-phase
4- Delta with neutral
5- Delta without neutral
6- Two-phase selector
9 2 Maximum Unit Voltage clearance 2 440V
10 2 Minimum Unit Voltage clearance 2 360V
11 2 Maximum generator current clearance 2
1000 
Amps
12 2 Short circuit detection clearance 2
3000 
Amps
13 2 Maximum Unit Frequency clearance 2 58Hz
14 2 Minimum Unit Frequency clearance 2 45Hz
15 2 Engine speed clearance 1 (only option CEM7J)
1500
rpm
0..10000 rpm
16 2 Speed J1939 clearance 2 (only option CEM7J) 1500 rpm  0..10000 rpm
17 2 Nominal Power of the genset clearance 1 220 kW
18 2 Nominal Power of the genset clearance 2 220 kW
19 2 Minimum engine speed clearance 1 1350
20 2 Maximum engine speed clearance 1 1740
21 2 Minimum engine speed clearance 2 1350
22 2 Maximum engine speed clearance 2 1740
Parameter PSW Description Default value Range
22 2 Input associated to AL4 mode 0
0- Not programmed
2- BPA (option CEM7J)
3- ATA (option CEM7J)
4- NA (option CEM7J)
5- ENT4
6- ENT5
8- ENT1
9- ENT2
10- ENT3
17- Extension ENT1
18- Extension ENT2
19- Extension ENT3
20- Extension ENT4
23 2 Input associated to AL5 mode 0
24 0 - -
25 2
Input associated with gas train 
checking mode
0
Table 11 
Programmable output genset alarms allocation
Contents Alarm
32 Water temperature
33 Oil pressure
34 Emergency stop
35 Alternator batteries
36 Starting failure
37 Water level
38 Fuel reserve
39

Overspeeding

40 Under Speed
41 Overload
42 Asymmetry
43 Maximum genset voltage
44 Maximum genset frequency
45 Phase sequence
46 Reverse Power
47 Battery voltage
48 Water temperature (sensor)
49 Oil pressure (sensor)
50 Fuel level
51 Short Circuit
52 Minimum genset voltage
53 Minimum genset frequency
54 Unexpected stop
55 Stop failure
 
Contents Alarm
56 Low Engine Temperature
57 Unit failure
58 Programmable 1
59 Programmable 2
60 Programmable 3
61 Com switching
62 Rental counter
63

Maintenance counter

64 Programmable 4
65 Programmable 5
66 Auxiliary battery
67 Battery high voltage
68 Start battery low voltage
69 Unit contactor
70 Unit power
71 Temperature probe 1
72 Temperature probe 2
73 Temperature probe 3
74 Temperature probe 4
75 J1939
76 Temperature probe 1
77 Temperature probe 2
78 Temperature probe 3
79 Temperature probe 4




(APPENDIX I) PARAMETERS TABLE  |  PAGE 65
Table 14 
Screen Table
Parameter PSW Description Default value Range
1 3 Inhibition of buzzer 0
0: Buzzer enabled
1: Buzzer disabled
2 3
PD inhibition in inputs/outputs 
menu
0
0: Enable PD activation in 
I/O menu
1: Disable PD activation in 
I/O menu
3 -
Enabling heating of display 
(read-only parameter version DGT 
version 4.45 or higher)
-
0: Disabled heating of display
1: Enabled heating of display
4 - Reserved -
5 - Reserved -
6 3 Mode motorpump
0: Motorpump inhibited
1: Motorpump enabled
Table 13 
Table J1939
Parameter PSW Description Default value Range
1 3 Engine model 0
SCANIA EMS
VOLVO EDC4
VOLVO EMS2
VOLVO EMS1
IVECO CURSOR
IVECO NEF
JOHN DEERE
MTU (SmartConnect)
PSI
TEDOM
2 3
Control version
(only expansion CCJ1939)
0
SCANIA (read only.):
160- Control version
161- Control version
REST: not available
3 3 Engine speed 0
Extension CCJ1939:
SCANIA:
0.1: 1500 rpm
2: 1800 rpm
3: idling speed
VOLVO:
Any writing switches speed 
between 1500 and 1800 
rpm.
IVECO:
0: 1000 rpm
1: 1500 rpm
2: 1800 rpm
Option CEM7J:
0.1: 1500 rpm
2: 1800 rpm
3: idling speed
4 2 Fine adjustment of speed 125
Fine adjustment of engine 
speed
5 3
Speed regulation by analogue 
input
0
0: Regulation disabled
1: Regulation enabled
2: Mode CiU (only CEM7J)
6 3 Droop Value 0
Droop Value:
0 - Droop Not enabled 
1..250- Droop Value (0.1%)
7 2
Change speed limiter
(only control unit CEM7J)
0
0-Disabled
1..250 Maximum speed 
change threshold 
(rpm/250ms)




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 66
10. APPENDIX II. CEM7 CONTROL UNIT SCREENS
10.1 CONTROL UNIT STATUS
The status of the CEM7 control unit is shown on the display, allowing access to 
different display options using the up and down navigation keys.
10.1.1 GENERATOR MEASUREMENT SCREENS
1. Measurements of voltage between the various phases and neutral, the phase 
currents and frequency.
GENERATOR:
2. Measurements of voltage between phases, currents each phase and 
frequency.
 
GENERATOR:
3. Measurements of V., A., NC., RPM., P., alternative display of voltages and 
currents, NC fuel level, engine speed RPM. P actual power consumed.




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 67
10.1.3 CONTROL UNIT STATUS SCREEN
1. Status of the programmable inputs
GENSET: STOPPED
START INHIBITED
Fig.1
CEM7 + CEA7CC2
GENSET: STOPPED
START INHIBITED
Fig.2
Status of the programmable inputs
IA: Start inhibited
AE: External start
CKG: Conrmation of genset contactor
CKR: Conrmation of network contactor
K-: Relay activation loading
T: Test function
F: Forced operation function
JP1: EJP1 function
JP2: EJP2 function
10.1.4 POWER AND ENERGY SCREEN
NOTE
Displayed on the energy screen are both accumulated energy as well as the date 
and time, if the option of a timer is available.
GENERATOR:
10.1.2 ENGINE STATUS SCREEN
1. Measurements of RPM., H., NC., DI., TM., VB., PA., display of engine speed 
RPM, H operating hours, NC fuel level, DI battery charging alternator voltage, TM 
engine temperature, VB battery voltage, PA oil pressure and, either AA auxiliary 
temperature or NC2 fuel level in auxiliary tank.
ENGINE
AA: Auxiliary Temp.

NOTE
To display the engine temperature and oil pressure, the engine must be provided 
with appropriate sensors.  
In the event the engine readings are conducted through the extension J1939, 
the word ENGINE is replaced by the word J1939. Activation of the electronic 
engine control is indicated by the ashing word J1939.
NOTE
Only rmware versions CEM7v3.21/PHG6/7v2.51 and above.  
Reading the value of the auxiliary battery voltage conducted by the Second Zero 
Suppression expansion is performed by cyclically switching every 5 seconds with 
the voltage value read from the main battery.




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 68
10.1.6 TEMPERATURES BY PT100 PROBES (ONLY IF EXPANSION MODULE PT100 
PROBES)
Fig.1
Temperature from probes
Fig.2
Probe not detected
10.2 CONTROL UNIT MAINTENANCE
10.2.1 PASSWORD ENTRY
With the control unit connected, select "Menu" and conrm (V). To enter the 
password using the cursor keys (+) and (-), select the number of the rst digit and 
conrm (V). Use the same procedure with the 4 digits. 
* * * * * * * MENU * * * * * * *
Password
0 0 0 0
1. Measurements of actual power and cos phi per phase.
POWER:
FP: Total power factor
FP1: Power factor phase 1
FP2: Power factor phase 2
FP3: Power factor phase 3
2. Measurements of the total energy consumed in the Day, Month and Year.
ENERGY:
D: Daily accumulated power
M: Monthly accumulated power
A: Annual accumulated power
10.1.5 LIST OF ERRORS
* ALARM *
MIN GENSET VOLT-
AGE
Fig.1
Error reading
E: Alarm / A: Warning
N: Pending notication
1: Position in the list of errors
3: Number of errors




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 69
10.2.2 MAIN MENU
The main menu screen gives access to the different menus, to enter each menu 
select it with the cursor (+) (-) and conrm (v): 
1. Inputs / Outputs
2. Parameters (only with authorization key)
3. Counters
4. List of previous errors
5. Schedule (programming only with timer option)
6. Date / Time
7. Language
8. Password
* * * * * * * MENU * * * * * * *

1 . Inputs / Outputs
2 . Parameters

3 . Counters
* * * * * * * MENU * * * * * * *

4 . History

5 . Schedule

6 . Date / Time
* * * * * * * MENU * * * * * * *

7 . Language

8 . Password

9 .
1. INPUTS AND OUTPUTS DISPLAY
* INPUTS /OUTPUTS *
IN:
OUT:
* INPUTS /OUTPUTS *
IN:
OUT:
 
INPUTS / IN OUTPUTS / OUT
R: Fuel reserve A: Alarm active
B: Low oil pressure M: Motor started
A: High temperature 1: Programmable output 1
N: Water level +: D+
X: Programmable input 4 2: Programmable output 2
I: Programmable input 5 3: Programmable output 3
P: Emergency stop r: Network contactor
1: Programmable input 1 g: Genset contactor
2: Programmable input 2 B: Transfer/heating
3: Programmable input 3 4: Programmable output 4
S: Mushroom head emergency stop R: PR/PD (PR output)
M: Ignition key P: PD/PE (PC output)
C: Enabling control unit




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 70
ANALOGUE INPUTS
NC PA
TM AA
DI VB
NC: Fuel level
PA: Oil pressure
TM: Engine temperature
AA: Auxiliary analogue
DI: Alternator voltage
VB: Battery voltage
2. ENGINE STATUS DISPLAY (ONLY CCJ1939 EXPANSION OR CEM7J OPTION)
* *
NA PT :
FR VB :
FU
NA: Coolant level
PT: Turbo pressure
FR: Average fuel consumption
FU: Total fuel consumption
VB: Battery voltage
h: Hours of engine operation
The second screen displaying J1939 measurements is available for rmware 
versions 3.36 and higher for genset and automatic display modules.
* *
IM : AT :
FU :
Hs : *
IM: Intake Manifold Temperature
AT: Actual Percent Torque
FU: Fuel partial counter
HS: Engine time partial counter
The partial fuel consumption and time counter are reset by holding down the 
RESET button for 5 seconds whenever the user is validated with a maintenance 
level password or higher.
NOTE
The engine status screen only appears in those gensets that have the J1939 
extension installed. The variables that appear displayed depend on the engine 
model installed.
3. COUNTERS
* * * * COUNTERS * * * *

Total Hours 0 1 : 0 0 : 0 0

Partial Hours 0 0 : 1 0 : 0 0

Correct starts 1 1 0




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 71
* * * * COUNTERS * * * *

Failed Starts 5

Total

Partial
* * * * COUNTERS * * * *

Day

Month

Year
* * * * COUNTERS * * * *

Mant. # 1

Mant. # 1

Rental
 
Partial counters can be reset by pressing the RESET button for 5 seconds.
4. LIST OF PREVIOUS ERRORS
Once the previous errors menu has been selected we can select any of the 
previous errors listed by pressing conrm (V). The control unit will show us the 
conditions which the genset was under at the time of the alarm by pressing (+) 
(-), it is possible to see the different screens.
* LIST OF ERRORS *

1 . MAX. NETWORK VOLTAGE  
2 . MIN. NETWORK VOLTAGE  

3 . MAX. NETWORK FREQ.       
5. SCHEDULE
The scheduling in the CEM7 control unit is conditioned so that the option of a 
timer is enabled. The scheduling is carried out via the fth option of the 
maintenance menu. 
* * * * * * * MENU * * * * * * *

5 . Schedules

6 . Date / Time

7 . Language
Programming procedure (Timer option necessary, see expansions Appendix):
The scheduling in the CEM7 control unit is conditioned so that the option of a 
timer is enabled. In the event the timer option is not detected, the control unit 
displays the message:
* * * * * SCHEDULES * * * * *
RTC NOT INSTALLED
The schedules are programmed to be repeated periodically one day a week. To 
enter each menu select it with the cursor (+) (-), and conrm (v):
* * * * * SCHEDULES * * * * *

Monday
Tuesday

Wednesday
* * * * * SCHEDULES* * * * *

Thursday

Friday

Saturday




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 72
 
* * * * * Monday * * * * *

BLOQ
ARRF

TEST
Fig.1
Type of action: Start time
* * * * * Monday * * * * *

BLOQ
ARRF

TEST
Fig.2
Type of action: End time
If you wish to program an action with an operating range that covers 2 consecutive 
days of the week (e.g. Monday between 22:00 and 03:00 on Tuesday), program 
the action to end at 23:59 on Monday and the same action to start at 00:00 on 
Tuesday.
* * * * * Monday * * * * *

BLOQ
- - - -

- - - -    
* * * * *     Tuesday    * * * * *

BLOQ
* * * * * SCHEDULES * * * * *

Sunday

Possible actions that can be scheduled are (in order of priority):
 • Lock (BLOQ): prevents the genset from being started and inhibits the 
activation of the contactor.
 • Forced start (ARRF): starts the genset and activates the contactor.
 • Test (TEST):  starts the genset without activating the contactor; in 
the event of receiving an external start command.
 • Free (----): no action is scheduled for that range; the start time and 
end time have no effect.
The timer option allows up to 5 different actions to be programmed on the same 
day. For each option is activation range is dened indicating the hour and minute 
of the start and end; the start time must always be before the end. The start 
time and end time are between 00:00 and 23:59.
From version CEx7 rev4.71 the frequency of the event can be programmed:
 • Weekly (option [0]). Every week the scheduled event is carried out.
 • Monthly (option [1]). Only during the rst week of the month (days 
1-7 inclusive) is the scheduled event carried out.
 • Bimonthly (option [2]). Only during the rst week (days 1-7 inclusive) 
and third week of the month (days 15 to 21 inclusive) is the 
scheduled event carried out.
Choose a day and conrm (V), the start hour (V), (V), start minute (V), end hour 
(V), end minute (V). To select program 2-3-4-5 use (+) (-) and repeat the above 
process. 




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 73
* * * LANGUAGE * * *

8. CUSTOMIZING PASSWORDS
* * * * PASSWORD * * * *

0 . User
1 . Maintenance
* * * *   USER       * * * *
Password
Fig.1
Old password
* * * *   USER       * * * *
Password
Fig.2
New password
9. J1939
* MENU *

1 . List of errors
2 . List of starts
- - - -

- - - -    
6. DATE AND TIME
Select the hour and conrm (V), adjust the time (+) (-) and conrm (V), adjust the 
minutes (+) (-) and conrm (V), adjust the seconds (+) (-) and conrm (V).
 
 
* * * DATE/TIME * * *
 
Time:

Date:
7. LANGUAGE SELECTION
To enter each menu select it with the cursor (+) (-), and conrm (v):
* * * LANGUAGE * * *

* * * LANGUAGE * * *

* * * LANGUAGE * * *

* * * LANGUAGE * * *





(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 74


 Conrm key (v) 


 Conrm key (v) 


Fig.1
 Harmonics: Change selection by pressing the confirm key (v)
 


 Conrm key (v) 


 Conrm key (v) 


Fig.2
 Total harmonic distortion (without noise -THD- or plus noise -THDN-):  
selection via the confirm key (v)
10. SYNCHRONIZATION
See Second Zero expansion manual.
11. HARMONICS
The control unit performs a calculation of the different voltage and current 
harmonics. The information shown is:
 • Spectrum graphic in frequencies 
 • Values in % of the harmonic components up to 20
 • Total harmonic distortion (THD) and total harmonic distortion plus 
noise (THDN) in %
Using the arrow keys (+) (-) the signal to be analysed is selected (VG1, VG2, VG3, 
VR1, VR2, VR3, I1, I2 or I3). To display the harmonic press the conrm key (v).
> Analysed signal: selection with cursors (+) (-).




Fig.1
Analysed signal: selection with cursors (+) (-)


Fig.2
Spectral analysis




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 75
* * * * MEASUREMENTS * * * *

   
 

   
 

    
 
Fig.2
No. of parameters
* * * * MEASUREMENTS * * * *

   
 

   
 

    
 
Fig.3
Value
10.3.1 TEXTS
We can associate a text to the programmable inputs, maximum 15 characters. 
The control unit has an alphabet A-Z and numbers 0-9.
* * * * TEXTS * * * *

1 . PROGRAMMABLE 1
2 . PROGRAMMABLE 2

3 . PROGRAMMABLE 3
* * * * TEXTS * * * *

4 . SCREEN

10.3.2 CUSTOMISING THE PROGRAMMABLE ALARMS TEXT
From the programming texts option of the control unit it is possible to customise 
the texts associated with the programmable alarms.
10.3 CONTROL UNIT PROGRAMMING
To enter each menu select it with the cursor (+) (-), and conrm (v):
The main menu is restricted to a minimum of a maintenance level password.
* * * * PARAMETERS * * * *

1 . Drawing dimension
2 . Times

3 . Regulations
* * * * PARAMETERS * * * *

4 . Thresholds

5 . Alarms

6 . Programming I / O
* * * * PARAMETERS * * * *

7 . Texts

8 . Equipment list

9 . Selector
* * * * PARAMETERS * * * *

10 .

11 . CCLAN

12 . Sensors
* * * * PARAMETERS * * * *

13 . Synchronisation

14 . Second Zero

15 . programming I / O
* * * * PARAMETERS * * * *

16 . Screen
17 .

Fig.1
Control unit programming




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 76
Programming the response curves of the sensors entering decreasing resistance 
value points. For curve 1 associated with temperature sensors, positive and 
negative values temperature are permitted; for curve 2 associated with pressure 
sensors only positive pressure values are permitted. The maximum number of 
points is 8 per programmable curve.
With the cursor keys (+) (-) each new point is selected and the resistance value is 
entered, the range of value being limited between 0 and the resistance value of 
the previous point. After entering the resistance value, the accept key is pressed 
and the value associated with said resistance is entered. If you want to nish 
programming the curve, hold down the conrm key (V) for 5 seconds after 
entering the value for the physical units of the point; if you want to program a 
new point on the curve, press the conrm key (V).
Once programming the curve has been completed, the system automatically 
returns to the sensors menu.
10.3.5 SCREEN
NOTE
From the rmware versions of control units: CEx6 ver 3.41/CEx7 ver 4.41 
From the screen parameters menu it is possible to set the display operation of 
the generator set's control unit.  
The congurable parameters refer to the Screen table.
10.3.3 CUSTOMISING THE MANUFACTURER'S SCREEN
From the programming texts option of the control unit it is possible to customise 
the manufacturer's screen.
30730 SAN JAVIER
MURCIA (Spain)
Tel. +34968191128
10.3.4 PROGRAMMING SENSOR CURVES
NOTE
Programming the curve of the control unit's rmware fuel gauges: 4.50/ 4.06
From the parameters option, two response curves can be programmed applicable 
to the temperature and pressure sensors. Response curves can also be 
programmed for the main tank gauge and for an auxiliary tank connected to the 
auxiliary analogue input (AA).
* * * * * * SENSORS * * * * * *

1 . Temperature

2 . Pressure

3 . Fuel
* * * * TEMPERATURE * * * * *

         
      




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 77
*
ON
1 / 4
Fig.5
Flashing code
*
ON
Fig.6
Error status
ON
Fig.7
Error counter
ON
Fig.8
List of errors
10.3.6 LIST OF ERRORS J1939
From the J1939 option it is possible to display the active and passive past errors 
stored in the engine's electronic conguration.
* ENGINE HISTORY *



Fig.1
Parameter No.
* ENGINE HISTORY *



Fig.2
Error code
ON
Fig.3
Error code
ON
Fig.4
Engine hours




(APPENDIX II) CONTROL UNIT SCREENS  |  PAGE 78
10.4 ACCESS TO MENUS
MENU CEM CEA
CEACC2
Associ-
ated
External
Maintenance
Inputs/Outputs
   
Counters
   
List of errors
   
Schedules
   
Date/time
   
Languages
   
Password
  
Engine history

(1)

(1)
Synchronisation

(2)
Parameters
Drawing dimension
   
Times
   
Regulations
   
Thresholds
   
Alarms
   
Programming I/O
   
Texts
   
List of equipment
   
Selector

(3)
J1939

(1)

(1)
Cclan
 
Sensors
 
Synchronisation

(2)
Second Zero

(2)
CC2 programming

(2)
Screen
   
PT100
   
(1)
Presence of expansion CCJ1939 or PHG7J detected.
(2)
Presence of Second Zero detected.
(3)
Without associated switching modules.
10.3.7 LIST OF STARTS (ONLY EXPANSION CCJ1939)
From the J1939 option it is possible to display the starts carried out from the 
J1939 extension in standalone mode.
* LIST OF STARTS *
Fig.1
Engine hours
* LIST OF STARTS *
Fig.2
List of starts




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 79
11. APPENDIX III: DIMENSIONS, WIRING AND 
MECHANICAL PARTS
11.1 MEASUREMENTS MODULE PHG7
Fig.1
Measurements module wiring
DIGITAL 
OUTPUTS
DIGITAL 
OUTPUTS
VOLTAGE FREE 
RELAY OUTPUT
VOLTAGE FREE 
RELAY OUTPUT
ANALOGUE 
INPUTS
DIGITAL 
INPUTS
PICK-UP
CURRENT
NETWORK 
VOLTAGE
GENSET 
VOLTAGE
CANBUS
POWER SUPPLY




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 80
WARNING
The equipment must be isolated or disconnected before performing this wiring, 
there is a risk of danger.
Fig.5
Measurements module wiring 5
Fig.6
Measurements module wiring 6
To carry out the wiring a cable with a cross-section of 2.5 mm
2
 must be used for 
+BAT, ARR, PR and PC connections. For the rest of the connections it is 
recommended that a cable be used with a cross-section of 1 mm
2 
.
Fig.2
Measurements module wiring 2
Fig.3
Measurements module wiring 3
Fig.4
Measurements module wiring 4
NETWORK 
CONTACTOR
GENSET 
CONTACTOR
FUEL TRANSFER 
PUMP OR HEATING 
ACTIVATION 
CONTACTOR
EMERGENCY 
STOP
POWER OUTPUTS MAC: 40A
OVERLOAD AND 
SHORT CIRCUIT 
CONTACTOR




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 81
SIGNAL DESCRIPTION TYPE Characteristics
SAL3 Output 3 Output PNP digital output
SETA Emergency stop button Output NPN digital input
PC Congurable stop Output PNP digital output of power
PR Preheating Output PNP digital output of power
ARR Starting Output PNP digital output of power
+BAT Positive battery terminal Power supply Digital outputs supply voltage
SCC
Overload and short 
circuit
Output Overload and short circuit relay, C contact
SCNC
Overload and short 
circuit
Output Overload and short circuit relay, NC contact
SCNA
Overload and short 
circuit
Output Overload and short circuit relay, NA contact
BTC Fuel transfer pump Output Fuel transfer pump relay, C contact
BTNA Fuel transfer pump Output Fuel transfer pump relay, NA contact
CGC Genset contactor Output Genset contactor relay, C contact
CGNC Genset contactor Output Genset contactor relay, NC contact
CGNA Genset contactor Output Genset contactor relay, NA contact
CRC Network contactor Output Network contactor relay, C contact
CRNC Network contactor Output Network contactor relay, NC contact
CRNA Network contactor Output Network contactor relay, NA contact
IL3 Current phase 3 Input Analogue input for current measurement
IL2 Current phase 2 Input Analogue input for current measurement
IL1 Current phase 1 Input Analogue input for current measurement
NIL Standard current Input Analogue input for current measurement
VR3 Network voltage phase 3 Input Analogue input for voltage measurement
VR2 Network voltage phase 2 Input Analogue input for voltage measurement
VR1 Network voltage phase 1 Input Analogue input for voltage measurement
NVR Neutral network voltage Input Analogue input for voltage measurement
VG3 Genset voltage phase 3 Input Analogue input for voltage measurement
VG2 Genset voltage phase 3 Input Analogue input for voltage measurement
VG1 Genset voltage phase 3 Input Analogue input for voltage measurement
NVG Neutral genset voltage Input Analogue input for voltage measurement
Table 1
Measurements module wiring PHG7
SIGNAL DESCRIPTION TYPE Characteristics
8÷36V Positive battery terminal Power supply Control unit supply voltage from 8 to 36V
-BAT Negative battery terminal Power supply Control unit supply negative
MAN Manual Input Start up PNP digital input
CANS CAN bus screen Bus CAN communication
CANL CANL line CAN bus Bus CAN communication
CANH CANH line CAN bus Bus CAN communication
RC Fuel reserve Input NPN digital input
BPA Low oil pressure Input NPN digital input
ATA High water temperature Input NPN digital input
NA Water level Input NPN digital input
ENT4 External start Input NPN digital input
ENT5 Start inhibition Input NPN digital input
PEM Emergency stop Input NPN digital input
ENT1 Input 1 Input NPN digital input
ENT2 Input 2 Input NPN digital input
ENT3 Input 3 Input NPN digital input
PCK1 Pick-up  Input PICK-UP high speed digital input
PCK2 Pick-up Input PICK-UP high speed digital input
NC Fuel level Input Analogue input of resistance sensor
P Pressure Input Analogue input of resistance sensor
T Temperature Input Analogue input of resistance sensor
AnC Oil temperature Input Analogue input of resistance sensor
DI Alternator voltage Input Analogue input with voltage 0-40V
GND Mass sensors Input Negative for sensors with 2 terminals
D+ Alternator excitation Output PNP digital output
AL Alarm Output PNP digital output
MA Motor started Output PNP digital output
SAL1 Output 1 Output PNP digital output
SAL2 Output 2 Output PNP digital output




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 82
Fig.7
Measurements module dimensions
Table 2
Electrical Characteristics
Symbol Parameter Conditions
Mini-
mum
Typi-
cal
Maxi-
mum
Unit
POWER SUPPLY (TERMINALS 8÷36V, –BAT, +BAT)
8÷36V Power supply of the control unit 8 36 VDC
+BAT Power supply of the outputs 8 36 VDC
I
BAT

Supply current 8÷36V=12V 100 mA
I
BAT
Supply current 8÷36V=24V 50 mA
P
BAT
Power consumption 1.2 W
CAN BUS (TERMINALS CANS, CANL, CANH)
V
IN
Input voltage in CANH and CANL -27 +40 V
DR
CAN
Baud rate 50 Kbps
L
CAN

Length of bus 500 m
Nodes Number of nodes in the bus 20 nodes
PNP DIGITAL INPUTS (MAN TERMINALS)
V
IN

Input voltage -0.7 40 V
V
IL
Low level input voltage 1 V
V
IH
High level input voltage 5 V
I
IL

Low level input current V
IN

 = 0V 0 100 uA
I
IH
High level input current V
IN
 = 12V 0.8 1 mA
NPN DIGITAL INPUTS (TERMINALS RC, BPA, ATA, NA, ENT4, ENT5, PEM, ENT1, ENT2, ENT3, SETA)
V
IN
Input voltage -0.7 40 V
V
IL
Low level input voltage 1 V
V
IH
High level input voltage 5 V
I
IL
Low level input current V
IN
 = 0V 2 2.5 mA
I
IH

High level input current V
IN

 = 24V 0 100 uA
HIGH SPEED DIGITAL INPUTS (PCK TERMINALS)
V
IN
Input voltage 30 VAC
I
IN
Input current V
IN
=12VAC 2.6 3 mA
F
IN
Input frequency V
IN
=12VAC 3600 Hz
ANALOGUE INPUTS (TERMINALS NC, P, T, AnC, DI, GND)
V
I
Input voltage 5 V
R
NC
Fuel level resistance 0 400 Ω
R
P
Pressure resistance 0 200 Ω
R
T

Water temperature resistance 0 4000 Ω
R
TC
Oil temperature resistance 0 4000 Ω
D
I
Alternator voltage 0 40 V




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 83
Symbol Parameter Conditions
Mini-
mum
Typi-
cal
Maxi-
mum
Unit
PNP OUTPUTS (TERMINALS D+, AL, MA, SAL1, SAL2, SAL3)
V
O
Output voltage +BAT V
I
O
Output current 1 A
R
D+
Output resistance D+ 47 Ω
PNP POWER OUTPUTS (TERMINALS PC, PR, ARR)
V
O
Output voltage +BAT V
I
O
Output current T = ∞ 20 A
I
O
Output current T = 1s 40 A
RELAY OUTPUTS (TERMINALS CRNA, CRNC, CRC, CGNA, CGNC, CGC, SCNA, SCNC, SCC)
V
O

High voltage relay contacts 250 VAC
I
O
Current relay contacts
cosφ = 1
8 A
RELAY OUTPUTS (TERMINALS BTNA, BTC)
V
O
High voltage relay contacts 250 VAC
I
O
Current relay contacts
cosφ = 1
5 A
ANALOGUE INPUTS FOR CURRENT MEASUREMENT (TERMINALS NIL, IL1, IL2, IL3)
I
IN
Input current 5 AAC
R
IN
Input resistance 0.05 Ω
ANALOGUE INPUTS FOR VOLTAGE MEASUREMENT (TERMINALS NVR, VR1, VR2, VR3, NVG, VG1, VG2, 
VG3)
V
IN-FF
Input voltage phase to phase 600 VAC
V
IN-FN
Input voltage phase to neutral 350 VAC
R
IN
Input resistance 1 MΩ
The measurements module must be mounted on the bottom of the electrical 
panel, if possible in the centre so that wiring can be carried out comfortably 
because there are connectors around the whole module.
There are no special ventilation requirements due to the low power consumed by 
the module.
11.2 DISPLAY MODULE CEM7
POWER SUPPLY
Fig.8
Display module wiring
Fig.9
Display module wiring
NOTE
To power the plate it is recommended that a cable be used with a cross-section 
of 1 mm
2
.
Table 3
Display module wiring
Signal Description Type Characteristics
8÷36 V
Positive battery 
terminal
Power supply Control unit supply voltage from 8 to 36V
-BAT
Negative battery 
terminal
Power supply Control unit supply negative
MAN Manual Input High-level digital input active
AUTO Automatic Input High-level digital input active
CANL CANL line CAN bus Bus CAN communication
CANH CANH line CAN bus Bus CAN communication




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 84
Fig.10
Display module dimensions
Table 4
Electrical characteristics
Symbol Parameter Conditions
Mini-
mum
Typi-
cal
Maxi-
mum
Unit
POWER SUPPLY (TERMINALS 8÷36 V, –BAT, +BAT)
8÷36 V Power supply of the control unit 8 36 VDC
+BAT Power supply of the outputs 8 36 VDC
I
BAT
Supply current
8÷36 V = 
12 V
100 mA
I
BAT
Supply current
8÷36 V = 
24 V
50 mA
P
BAT
Power consumption 1.2 W
CAN BUS (TERMINALS CANL, CANH)
V
IN
Input voltage in CANH and CANL -27 +40 V
DR
CAN
Baud rate 50 Kbps
L
CAN
Length of bus 500 m
Nodes Number of nodes in the bus 20 nodes
PNP DIGITAL INPUTS (MAN TERMINALS)
V
IN
Input voltage -0.7 40 V
V
IL
Low level input voltage 1 V
V
IH
High level input voltage 5 V
I
IL
Low level input current V
IN
 = 0V 0 100 uA
I
IH
High level input current V
IN
 = 12V 0.8 1 mA
NPN DIGITAL INPUTS (TERMINALS RC, BPA, ATA, NA, AE, IA, PEM, ENT1, ENT2, ENT3, SETA)
V
IN
Input voltage -0.7 40 V
V
IL
Low level input voltage 1 V
V
IH
High level input voltage 5 V
I
IL
Low level input current V
IN
 = 0V 2 2.5 mA
I
IH
High level input current V
IN
 = 24V 0 100 uA
HIGH SPEED DIGITAL INPUTS (PCK TERMINALS)
V
IN
Input voltage 30 VAC
I
IN
Input current V
IN
 = 12 VAC 2.6 3 mA




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 85
Symbol Parameter Conditions
Mini-
mum
Typi-
cal
Maxi-
mum
Unit
F
IN
Input frequency V
IN
 = 12 VAC 3600 Hz
ANALOGUE INPUTS (TERMINALS NC, P, T, AnC=TC, DI, GND)
V
I
Input voltage 5 V
R
NC
Fuel level resistance 0 400 Ω
R
P
Pressure resistance 0 200 Ω
R
T
Water temperature resistance 0 4000 Ω
R
TC
Oil temperature resistance 0 4000 Ω
D
I
Alternator voltage 0 40 V
PNP OUTPUTS (TERMINALS D+, AL, MA, SAL1, SAL2, SAL3)
V
O
Output voltage +BAT V
I
O
Output current 1 A
R
D+
Output resistance D+ 47 Ω
PNP POWER OUTPUTS (TERMINALS PC, PR, ARR, SAL4)
V
O
Output voltage +BAT V
I
O
Output current T = ∞ 20 A
I
O
Output current T = 1s 40 A
RELAY OUTPUTS (TERMINALS CRNA, CRNC, CRC, CGNA, CGNC, CGC, BTNA, BTC)
VO High voltage relay contacts 250 VAC
IO Current relay contacts
cosφ = 0
8 A
ANALOGUE INPUTS FOR CURRENT MEASUREMENT (TERMINALS NIL, IL1, IL2, IL3)
IIN Input current 5 AAC
RIN Input resistance 0.05 Ω
ANALOGUE INPUTS FOR VOLTAGE MEASUREMENT (TERMINALS NVR, VR1, VR2, VR3, NVG, VG1, VG2, 
VG3)
VIN-FF Input voltage phase to phase 600 VAC
VIN-FN Input voltage phase to neutral 350 VAC
RIN Input resistance 1 MΩ
11.3 MEASUREMENTS MODULE PHG7J
Fig.1
Measurements module wiring.
DIGITAL 
OUTPUTS
DIGITAL 
OUTPUTS
VOLTAGE FREE 
RELAY OUTPUT
VOLTAGE FREE 
RELAY OUTPUT
ANALOGUE 
INPUTS
DIGITAL 
INPUTS
PICK-UP
CURRENT
NETWORK 
VOLTAGE
GENSET 
VOLTAGE
POWER SUPPLY




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 86
Fig.5
Measurements module wiring section 4
To carry out the wiring a cable with a cross-section of 2.5 mm
2
 must be used for 
+BAT, ARR, PR and PC connections. For the rest of the connections it is 
recommended that a cable be used with a cross-section of 1 mm
2 
.
Fig.6
Measurements module wiring section 4
ATTENTION
The equipment must be isolated or disconnected before performing this wiring, 
there is a risk of danger.
Fig.2
Measurements module wiring section 1
To power the plate it is recommended that a cable be used with a cross-section 
of 1 mm
2
.
Fig.3
Measurements module wiring section 2
Fig.4
Measurements module wiring section 3
NETWORK 
CONTACTOR
GENSET 
CONTACTOR
FUEL TRANSFER 
PUMP OR HEATING 
ACTIVATION 
CONTACTOR
EMERGENCY 
STOP
POWER OUTPUTS MAC: 40 A
OVERLOAD AND 
SHORT CIRCUIT 
CONTACTOR




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 87
Signal Description Type Characteristics
SETA Emergency stop button Output Low-level digital input active
PC Congurable stop Output High-level power digital output active
PR Preheating Output High-level power digital output active
ARR Starting Output High-level power digital output active
SAL4 Output 4 Output High-level power digital output active
+BAT Positive battery terminal Power supply Digital outputs supply voltage
SCC Overload and short circuit Output
Overload and short circuit relay, C 
contact
SCNC Overload and short circuit Output
Overload and short circuit relay, NC 
contact
SCNA Overload and short circuit Output
Overload and short circuit relay, NA 
contact
BTC Fuel transfer pump Output Fuel transfer pump relay, C contact
BTNA Fuel transfer pump Output Fuel transfer pump relay, NA contact
CGC Genset contactor Output Genset contactor relay, C contact
CGNC Genset contactor Output Genset contactor relay, NC contact
CGNA Genset contactor Output Genset contactor relay, NA contact
CRC Network contactor Output Network contactor relay, C contact
CRNC Network contactor Output Network contactor relay, NC contact
CRNA Network contactor Output Network contactor relay, NA contact
IL3 Current phase 3 Input Analogue input for current measurement
IL2 Current phase 2 Input Analogue input for current measurement
IL1 Current phase 1 Input Analogue input for current measurement
NIL Standard current Input Analogue input for current measurement
VR3 Network voltage phase 3 Input Analogue input for voltage measurement
VR2 Network voltage phase 2 Input Analogue input for voltage measurement
VR1 Network voltage phase 1 Input Analogue input for voltage measurement
NVR Neutral network voltage Input Analogue input for voltage measurement
VG3 Genset voltage phase 3 Input Analogue input for voltage measurement
VG2 Genset voltage phase 3 Input Analogue input for voltage measurement
VG1 Genset voltage phase 3 Input Analogue input for voltage measurement
NVG Neutral genset voltage Input Analogue input for voltage measurement
Table 5
Measurements module wiring PHG7J
Signal Description Type Characteristics
8÷36 V Positive battery terminal Power supply
Control unit supply voltage from 8 to 
36V
-BAT Negative battery terminal Power supply Control unit supply negative
MAN Manual Input High-level digital input active for start up
CANS CAN bus screen Bus CAN communication
CANL CANL line CAN bus Bus CAN communication
CANH CANH line CAN bus Bus CAN communication
J1939S J1939 bus screen Bus J1939 communication
J1939L J1939L line J1939 bus Bus J1939 communication
J1939H J1939H line J1939 bus Bus J1939 communication
RC Fuel reserve Input Low-level digital input active
BPA Low oil pressure Input Low-level digital input active
ATA High water temperature Input Low-level digital input active
NA Water level Input Low-level digital input active
AE External start Input Low-level digital input active
IA Start inhibition Input Low-level digital input active
PEM Emergency stop Input Low-level digital input active
ENT1 Input 1 Input Low-level digital input active
ENT2 Input 2 Input Low-level digital input active
ENT3 Input 3 Input Low-level digital input active
PCK1 Pick-up  Input PICK-UP high speed digital input
PCK2 Pick-up Input PICK-UP high speed digital input
NC Fuel level Input Analogue input of resistance sensor
P Pressure Input Analogue input of resistance sensor
T Temperature Input Analogue input of resistance sensor
TC Oil temperature Input Analogue input of resistance sensor
DI Alternator voltage Input Analogue input with voltage 0-40V
GND Mass sensors Input Negative for sensors with 2 terminals
D+ Alternator excitation Output High-level digital output active
MA Motor started Output High-level digital output active
SAL1 Output 1 Output High-level digital output active
SAL2 Output 2 Output High-level digital output active
SAL3 Output 3 Output High-level digital output active




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 88
Symbol Parameter Conditions
Mini-
mum
Typi-
cal
Maxi-
mum
Unit
ANALOGUE INPUTS (TERMINALS NC, P, T, AnC, DI, GND)
V
I
Input voltage 5 V
R
NC
Fuel level resistance 0 400 Ω
R
P
Pressure resistance 0 200 Ω
R
T
Water temperature resistance 0 4000 Ω
R
TC
Oil temperature resistance 0 4000 Ω
D
I
Alternator voltage 0 40 V
PNP OUTPUTS (TERMINALS D+, AL, MA, SAL1, SAL2, SAL3)
V
O
Output voltage +BAT V
I
O
Output current 1 A
R
D+
Output resistance D+ 47 Ω
PNP POWER OUTPUTS (TERMINALS PC, PR, ARR)
V
O
Output voltage +BAT V
I
O
Output current T = ∞ 20 A
I
O
Output current T = 1s 40 A
RELAY OUTPUTS (TERMINALS CRNA, CRNC, CRC, CGNA, CGNC, CGC, SCNA, SCNC, SCC)
V
o
High voltage relay contacts 250 VAC
I
o
Current relay contacts
Cosφ=1
8 A
RELAY OUTPUTS (TERMINALS BTNA, BTC)
V
o
High voltage relay contacts 250 VAC
I
o
Current relay contacts
Cosφ=1
5 A
ANALOGUE INPUTS FOR CURRENT MEASUREMENT (TERMINALS NIL, IL1, IL2, IL3)
I
IN
Input current 5 AAC
R
IN
Input resistance 0.05 Ω
ANALOGUE INPUTS FOR VOLTAGE MEASUREMENT (TERMINALS NVR, VR1, VR2, VR3, NVG, VG1, VG2, 
VG3)
V
IN-FF
Input voltage phase to phase 600 VAC
V
IN-FN
Input voltage phase to neutral 350 VAC
R
IN
Input resistance 1 MΩ
The measurements module must be mounted on the bottom of the electrical 
panel, if possible in the centre so that wiring can be carried out comfortably 
because there are connectors around the whole module. There are no special 
ventilation requirements due to the low power consumed by the module.
Table 6
Electrical Characteristics
Symbol Parameter Conditions
Mini-
mum
Typi-
cal
Maxi-
mum
Unit
POWER SUPPLY (TERMINALS 8÷36V, –BAT, +BAT)
8÷36 V Power supply of the control unit 8 36 VDC
+BAT Power supply of the outputs 8 36 VDC
I
BAT
Supply current
8÷36 V = 
12 V
200 mA
I
BAT
Supply current
8÷36 V = 
24 V
100 mA
P
BAT
Power consumption 2.4 W
CAN BUS (TERMINALS CANS, CANL, CANH)
V
IN
Input voltage in CANH and CANL -27 +40 V
DR
CAN
Baud rate 50 Kbps
L
CAN
Length of bus 500 m
Nodes Number of nodes in the bus 20 nodes
J1939 BUS (TERMINALS J1939S, J1939L, J1939H)
V
IN
Input voltage in J1939H and J1939L -27 +40 V
DR
J1939
Baud rate 250 Kbps
L
J1939
Length of bus 40 m
Nodes Number of nodes in the bus 30 nodes
PNP DIGITAL INPUTS (MAN TERMINALS)
V
IN
Input voltage -0.7 40 V
V
IL
Low level input voltage 1 V
V
IH
High level input voltage 5 V
I
IL
Low level input current V
IN
 = 0V 0 100 uA
I
IH
High level input current V
IN
 = 12V 0.8 1 mA
NPN DIGITAL INPUTS (TERMINALS RC, BPA, ATA, NA, ENT4, ENT5, PEM, ENT1, ENT2, ENT3, SETA)
V
IN
Input voltage -0.7 40 V
V
IL
Low level input voltage 1 V
V
IH
High level input voltage 5 V
I
IL
Low level input current V
IN
 = 0V 2 2.5 mA
I
IH
High level input current V
IN
 = 24V 0 100 uA
HIGH SPEED DIGITAL INPUTS (PCK TERMINALS)
V
IN
Input voltage 30 VAC
I
IN
Input current V
IN
 = 12 VAC 2.6 3 mA
F
IN
Input frequency V
IN
 = 12 VAC 3600 Hz




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 89
11.4 DISPLAY MODULE: CEM7.1
Fig.1
Measurements module display 1
Fig.2
Measurements module display 1
To power the plate it is recommended that a cable be used with a cross-section 
of 1 mm
2
.
Fig.7
Measurements module dimensions.
POWER SUPPLY




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 90
Fig.3
Display module dimensions 
Table 7
Display module wiring CEM7.1
SIGNAL DESCRIPTION TYPE CHARACTERISTICS
8÷36V Positive battery terminal Power supply Control unit supply voltage from 8 to 36V
-BAT
Negative battery 
terminal
Power supply Control unit supply negative
MAN Manual Input PNP digital input
AUTO Automatic Input PNP digital input
CANS CAN bus screen Bus CAN communication
CANL CANL line CAN bus Bus CAN communication
CANH CANH line CAN bus Bus CAN communication
To carry out the wiring a cable with a cross-section of 1 mm
2
 must be used.
Table 8
Electrical Characteristics
Symbol Parameter Conditions
Mini-
mum
Typi-
cal
Maxi-
mum
Unit
POWER SUPPLY (TERMINALS 8÷36 V, –BAT)
8÷36V Power supply 8 36 VDC
I
BAT
Supply current
8÷36 V 
=12 V
210 mA
I
BAT
Supply current
8÷36 V = 
24 V
105 mA
P
BAT
Power consumption 2.5 W
CAN BUS (TERMINALS CANS, CANL, CANH)
V
IN
Input voltage in CANH and CANL -27 +40 V
DR
CAN
Baud rate 50 Kbps
L
CAN
Length of bus 250 m
Nodes Number of nodes in the bus 20 nodes
PNP DIGITAL INPUTS (TERMINALS MAN, AUTO)
V
IN
Input voltage -0.7 40 V
V
IL
Low level input voltage 1 V
V
IH
High level input voltage 5 V
I
IL
Low level input current V
IN
 = 0V 0 100 uA
I
IH
High level input current V
IN
 = 12V 0.8 1 mA
The display module is mounted on the front of the electrical panel.
There are no special ventilation requirements due to the low power consumed by 
the module.




(APPENDIX III) DIMENSIONS, WIRING AND MECHANICAL PARTS | PAGE 91
11.5 GENERAL INFORMATION, CHARACTERISTICS AND INSTALLATION OF THE 
EQUIPMENT.
The following documentation is supplied with the equipment:
 • General information:
 • It is necessary to consult the documentation.
 • Characteristics:
The equipment has been designed to be safe in the following range of 
environmental conditions:
-the control units must be mounted inside an electrical panel, which is used 
outdoors.
 • Operating temperature -20ºC ~ +70ºC.
 • Maximum relative humidity 80% (without condensation).
 • Installation:
The equipment is included within the measurement category CAT III 600V for 
measurements performed in the building installation.
Disconnection means should be incorporated to the xed installation in 
accordance with installation regulations. Such means must have contact 
separation for all poles that provide full disconnection in category III overvoltage 
conditions.
The disconnecting means must be accessible by the user. The surface areas of 
the equipment and the external face should be cleaned with a damp cloth. For 
proper protection of the equipment, the following elements must be installed in 
the control panel:
No. Fuses Amps
F0 General Positive Power 40
F1 Digital Automatic Control Unit CEM7 2
F2 Phase U 2
F3 Phase V 2
F4 Phase W 2
F5 Differential Relay + Tripping Coil 2
F6 Battery Charger 4
F7 Fuel Transfer Kit 10
The negative terminal of the battery, electrical panel chassis and generator 
chassis must all be earthed.




(APPENDIX IV) CAN COMMUNICATIONS  |  PAGE 92
12. APPENDIX IV: CAN COMMUNICATIONS
12.1 INTRODUCTION
The CAN BUS, is an industrial bus characterized by great strength and reliability 
and ensures proper communication between the devices in noisy environments. 
Devices with CAN controller can be integrated into an industrial automation and 
control system.
The most relevant characteristics of a control system with communication via 
CAN bus are as follows:
 • It is possible to connect up to 110 devices on a single CAN network.
 • Each network can reach up to 1000 meters in length, easily 
expandable (up to 2000 m) with the use of bridges or repeaters.
 • CAN baud rate of 50 kbits / s (for 1000 metres of bus: 10 ms data 
update).
 • Direct access to the CAN bus from a PC via USBCan.
The CANbus can operate in environments with extreme noise and interference, 
while the error checking mechanisms ensure that the connections contaminated 
by noise are detected.
The CAN bus is designed so that communication will continue even if:
 • Either of the two bus cables breaks.
 • Any cable has short-circuited to ground.
 • Any wire has short-circuited to the power supply.
12.2 TOPOLOGY
The CAN network uses a bus topology, where each node has an input and an 
output connection. The end nodes of the bus must have a 120Ω terminator; said 
terminator is activated via a switch on each module (ON: active terminator, 1: 
inactive terminator). In any case, the existing impedance between the CANH and 
CANL lines should be approximately 60 Ω. For this purpose at each end of the 
network a resistance value should set such that said impedance is guaranteed 
from any module connected.




(APPENDIX IV) CAN COMMUNICATIONS  |  PAGE 93
Table 2
Characteristics of the cable depending on the number of nodes
 
Length of bus Number of nodes
32 64 100
100 m 0.25 mm
2
0.25 mm
2
0.25 mm
2
250 m 0.34 mm
2
0.50 mm
2
0.50 mm
2
500 m 0.75 mm
2
0.75 mm
2
1.00 mm
2
Cable Resistance <21 mΩ <18.5 mΩ <16 mΩ
 
To connect the different nodes to the network an unshielded twisted pair cable is 
required. As an exception, inside for the connection between the measurements 
and visualization module of the control unit, an untwisted cable can be used.
In very noisy environments and with high electromagnetic interference (EMI) 
shielded twisted cable can be used with the shield connected to earth of the 
installation. Another technique for improving immunity to electromagnetic 
interference is to replace the CAN terminator of the node for two 62Ω resistors 
and install a bypass capacitor between the CAN resistance and battery negative.
 

Fig.2
Protection technique against electromagnetic noise: 
 Decoupling capacitor
NOTE 
The existing impedance must be measured when all the equipment is no longer working 
or does not have physical access to the network. For more information, please see the 
ISO 11898 specication and the different notes that apply in this respect.
 

Fig.1
CAN bus topology
12.3 WIRING
The CAN network requires wiring dependent on the distance, baud rate and 
number of nodes connected to the bus.
Table 1
Characteristics of the cable depending on the length
Length of bus Characteristics of the cable
Length/resistance ratio Cross-section
0 m..40 m 70 mΩ/m
0.25 mm
2
..0.34 mm
2
AWG23, AWG22
40 m..300 m <60 mΩ/m
0.34 mm
2
..0.6 mm
2
AWG22 , AWG20
300 m..600 m <40 mΩ/m
0.4 mm
2
..0.6 mm
2
AWG20
600 m..1 Km <26 mΩ/m
0.75 mm
2
..0.8 mm
2
AWG18
CAN Bus line
node 1 node n
Bus Line




(APPENDIX IV) CAN COMMUNICATIONS  |  PAGE 94
MANUAL SWITCHING
MEASUREMENTS MEASUREMENTS
DISPLAY DISPLAY
CCrs
Fig.6
Manual control unit + switching + CCrs
12.4 WIRING DIAGRAMS 
MEASUREMENTS
Fig.3
Manual / automatic control unit
MANUAL SWITCHING
MEASUREMENTS MEASUREMENTS
DISPLAY DISPLAY
Fig.4
Manual control unit + switching
MEASUREMENTS CCrs
DISPLAY
Fig.5
Manual / automatic control unit + CCrs option




(APPENDIX VII) CALIBRATION OF THE CONTROL UNIT  |  PAGE 95
13. APPENDIX V: CALIBRATION OF THE CONTROL 
UNIT
The CEx7 control unit allows calibration adjustments to be made to the voltage 
measurements of the genset and network (only control units CEA7 and CE-
A7CC2). For this purpose, it is enabled in the Parameters menuMeasurements 
of parameters 3, 4 and 5 for calibrating the voltages R, S and T of the genset; 
also, parameters 14, 15 and 16 are enabled for calibrating the voltages U, V and 
W of the network (only control units CEA7 and CEA7CC2). To carry out this pro-
cess, the enabling of a manufacturer level password is required.
* * * * PARAMETERS * * * *

1 . Drawing dimension
2 . Times

3 . Regulations
To access the calibration process pressed the key  to access the parameter 
that calibrates the corresponding phase. 
* * * * MEASUREMENTS * * * *

     

     

      
When entering calibration mode, the current voltage measurement between 
phase and neutral of the corresponding phase is shown:
* * * * MEASUREMENTS * * * *

     

     

      




(APPENDIX VII) CALIBRATION OF THE CONTROL UNIT  |  PAGE 96
Using the keys the voltage between phase and neutral measured by the con-
trol unit is adjusted to match the actual value.
* * * * MEASUREMENTS * * * *

     

     

      
Pressing the key completes the calibration process. The calibration process 
can be interrupted by pressing the key . Calibration of the system can be reset 
by writing parameter 17 for the network voltage and parameter 18 for the genset 
voltages.




(APPENDIX VII) CALIBRATION OF THE CONTROL UNIT  |  PAGE 97
15. APPENDIX VII: COMMUNICATIONS FAILURE
The user interface of the CEx7 control unit displays the text COMMUNICATIONS 
FAILURE when it cannot establish communication with the PHG7 control module. 
This condition may be caused by:
 • The terminals of the installation's CAN communications bus are 
not enabled: Turn off the control unit, check that there is 60 Ω of 
impedance between the installation's CANH and CANL lines.
 • Faulty wiring of the communications bus: Turn off the control 
unit, check the continuity between the CANH terminals of the user 
interface and the PHG7 control module. Then, check the continuity 
between the CANL terminals of the user interface and the PHG7 
control module.
 • PHG7 module power failure: Turn on the control unit, check that the 
voltage between the BAT+ and the BAT- terminals of the PHG7 power 
module is greater than 8 V.
 • PHG7 module activation failure: Turn on the control unit, check that 
the voltage between the MAN and the BAT- terminals of the PHG7 
power module is greater than 8 V.
14. APPENDIX VI: EXPANDING INPUTS
The CEx7 control unit allows you to add digital inputs, analogue inputs (0-10 V, 
4-2 0mA and resistant) and PT100 by connecting input expansion module devic-
es (CCIn8 and CCPT100) to the control unit's communications bus. Up to 4 input 
expansion modules can be connected (CCIn8 and CCPT100), as follows: 
 • Digital inputs: The unit can handle the digital inputs of up to 4 digital 
input expansion modules (up to 32 digital inputs).
 • Temperature input via PT100 probe: The unit can handle the 
temperature inputs of up to 2 CCPT100 modules (8 temperature 
inputs via PT100 probes).
 • Analogue inputs (0-10 V, 4-20 mA and resistant): The unit can 
handle 1 CCPT100 module (5 analogue inputs).




HIMOINSA reserves the right to modify any characteristic without prior 
notice. Illustrations may include optional equipment and/or accessories. 
Non contractual images. The technical information described in this 
manual corresponds to the information available at the time of printing. 
HIMOINSA ® - 2018 ©All rights reserved.
© HIMOINSA - February 2018
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