Additional Functions; Start Functions; Digital Feedbacks - Deif CGC 400 Reference Book

CGC 400 DRH 4189340786 UK

7. Additional functions

7.1 Start functions

7.1.1 Start functions
The controller will start the genset when the start command is given. The start sequence is deactivated when
the remove starter event occurs or when the running feedback is present.
The reason for having two possibilities to deactivate the start relay is to be able to delay the alarms with run
status.
If it is not possible to activate the run status alarms at low revolutions, the remove starter function must be
used.
An example of a critical alarm is the oil pressure alarm. Normally, it is configured according to the shutdown
fail class. But if the starter motor has to disengage at 400 RPM, and the oil pressure does not reach a level
above the shutdown setpoint before 600 RPM, then the genset would shut down if the specific alarm was ac-
tivated at the preset 400 RPM. In that case, the running feedback must be activated at a higher number of
revolutions than 600 RPM.
RPM
1000
600
400

7.1.2 Digital feedbacks

If an external running relay is installed, the digital control inputs for running detection or remove starter can be
used.
Running feedback
When the digital running feedback is active, the start relay is deactivated, and the starter motor will be disen-
gaged.
DEIF A/S
RPM
t
Additional functions
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