8.7.10 Primary running feedback failure
This alarm is for genset running feedback failure. This alarm is only
available if more than one running feedback is present. The alarm is
activated if running is detected on any of the secondary running feedbacks
but not on the primary running feedback.
The sequence diagram on the right shows how the primary running
feedback failure alarm works.
1. Start attempt: The controller gets a start signal.
2. Crank: The controller activates the Crank output.
3. Primary running feedback: If the primary running feedback has failed,
it does not detect the genset start.
4. Secondary running feedback: The secondary running feedback
detects the genset start. The crank stops after running is detected. The
alarm timer starts when running is detected on the secondary running
feedback, but not on the primary running feedback.
5. Alarm: If the primary running feedback does not detect that the genset
has started within the delay time (t1), the Primary running feedback
failure alarm is activated.
1
t1
Start
attempt
Secondary
running
feedback
Crank
Alarm
Primary
running
feedback
(1)
(3)
(4)
(5)
(2)
Configure the parameters under Configure > Parameters > Engine > Running detection > Primary running feedback failure.
The alarm is always Enabled.
Table 8.34
Default parameters
Parameter Range Default
Delay 0 s to 3 min 2 s
Latch Not enabled, Enabled Enabled
Action Warning
8.7.11 Start failure
This alarm is for genset start failure.
If the genset has not started after the maximum number of start attempts are completed (see the
parameter Normal), the controller activates this alarm.
Configure number of start attempts under Configure > Parameters > Engine > Start sequence > Start attempts.
Table 8.35
Default parameter
Parameter Range Default
Normal 1 to 10 3
Configure the start failure parameters under Configure > Parameters > Engine > Start sequence > Start failure.
DESIGNER'S HANDBOOK 4189340911K UK Page 315 of 521
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