AGC Designer’s Reference Handbook
DEIF A/S Page 44 of 168
Interruption of start sequence
The start sequence is interrupted in the following situations:
Start failure alarm
(6180 Start attempts)
The start failure alarm occurs, if the gen-set has not started after the last start attempt. Output A
(OA) and output B (OB) in this menu indicate the relay output(s) which will be activated at a start
failure alarm.
Start prepare (
6170 Starter
)
The start prepare timer can be used for start preparation purposes, e.g. pre-lubrication or pre-
glowing.
Event Comment
Stop signal
Start failure
Remove starter
feedback
Tacho setpoint.
Running feedback Digital input.
Running feedback Tacho setpoint.
Running feedback Frequency measurement above 32Hz.
The frequency measurement requires a voltage measurement of 30%
* U
NOM
.
The running detection based on the frequency measurement can
replace the running feedback based on tacho or digital input or engine
communication.
Emergency stop
Alarm Alarms with ‘shutdown’ or ‘trip and stop’ fail class.
Stop push-button on
display
Only in semi-auto or manual mode.
Modbus stop command Semi-auto or manual mode.
Binary stop input Semi-auto or manual mode.
Deactivate the ‘auto
start/stop’
Auto mode in the following gen-set modes:
Island operation, fixed power, load take over or mains power export
mode.
Running mode It is not possible to change the running mode to ‘block’ as long as the
gen-set is running.
If the tacho input is to be used to remove the starter, it has to be set up in menu
6161. If the digital input is to be used as running feedback, then terminal 115
has to be used.
The only protections that can stop the gen-set/interrupt the start sequence
when the ‘fire pump’ input is activated, are the digital input ‘emergency stop’
and the tacho alarm ‘overspeed 2’. Both of these must have the fail class ‘shut
down’.
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