Himoinsa CEM7 User manual

INSTRUCTION MANUAL
PROFESSIONAL
DIGITAL CONTROL UNIT CEM7

GENERATOR HS355 | PAGE 2
CONTENTS
31. Introduction
62. 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.