Set point selection Description
Internal Set point is taken from the internal settings, for example nominal frequency for fixed
frequency
External The set point is taken from the analogue inputs (+/-10 V DC)
Communication Set points are taken from the control register
Control set points
The control set points are described in the table below.
Mode/Set point Internal External Communication
(Ctrl. reg. table)
Fixed frequency Nom. frequency +/-5 Hz Address 3
Fixed power Menu 7051 0 to 100 % Address 1
Frequency droop Menu 2514 or 2573 +/-5 Hz Address 3
Load sharing Analogue lines +/-5 Hz Analogue lines
4.9 Fail class
All activated alarms must be configured with a fail class. The fail classes define the category of the alarms
and the subsequent alarm action.
Five different fail classes can be used. The tables below illustrate the action of each fail class when the en-
gine is running or stopped.
Engine running
Fail class/Action Alarm horn
relay
Alarm dis-
play
De-load Trip of GB Cooling-
down genset
Stop gen-
set
1 Block X X
2 Warning X X
3 Trip of GB X X X
4 Trip and stop X X X X X
5 Shutdown X X X X
6 Safety stop X X X X X
Safety stop will not de-load the GB in Manual or SWBD mode. In this case, the fail class will
have the same functionality as the "Block" fail class.
The table illustrates the action of the fail classes. If, for example, an alarm has been configured with the "shut-
down" fail class, the following actions occur:
● The alarm horn relay will activate
● The alarm will be displayed in the alarm info screen
● The generator breaker will open instantly
● The genset is stopped instantly
● The genset cannot be started from the unit (see next table)
GPC-3 DRH 4189340587 UK
Additional functions
DEIF A/S Page 58 of 122
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