Himoinsa CEM7 - Oil Pump Control

OPERATION | PAGE 18
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 LOAD DEMAND
DESCRIPTION
This functionality allows an output of the control unit to be activated in order to
disconnect part of the installation load in order to protect the generator set from
over-consumption.
Start-up of the output is performed based on the programming of a maximum
network power threshold (kW) that is consumed by the installation over a certain
period of time.
Once the power consumed by the installation is below the set deactivation
threshold and the set time has elapsed, the control unit deactivates the output
so that the genset may re-assume the total installation load.
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.