InteliLite4 AMF20 Global Guide
129
Analog input alarm evaluation principle
Image 5.25 Analog input alarm evaluation principle
Alarm handling
There are four different alarm categories regarding the period when the alarms are evaluated. The category is
selectable for alarms assigned to binary/analog inputs and fixed for built-in alarms. The categories are the
following:
The alarm is evaluated all the time the controller is switched on.
The alarm is evaluated only when the engine is running. This type should be used for e.g. oil pressure.
These alarms begin to be evaluated after the engine has been started with the delay given by the setpoint
Run Only Block Delay (page 239).
The alarm is evaluated only when the generator is excited. These alarms begin to be evaluated after the
engine has been started and Maximal Stabilization Time (page 238) has elapsed or the GCB has been
closed. They remain evaluated until cooling has finished. Only Generator under/overvoltage, Generator
voltage unbalance and Generator under/overfrequency belong to this category. This category is not
configurable to binary and analog input alarms.
The alarm is evaluated only when LBI PROTECTION FORCE DISABLE (PAGE 455) is not active.
If an alarm is being evaluated and the appropriate alarm condition is fulfilled, the delay of evaluation will start
to run. The delay is adjustable by a setpoint (in the case of built-in alarms, analog input alarms) or is adjusted
via configuration window in InteliConfig (in the case of binary input alarms). If the conditions persist, the alarm
will activate. The alarm will not activate if the condition is dismissed while the delay is still running.
After pressing the Fault reset button or activating the binary input FAULT RESET BUTTON (PAGE 448), all active
alarms change to confirmed state. Confirmed alarms will disappear from the Alarm list as soon as the
respective condition dismisses. If the condition is dismissed before acknowledging the alarm, the alarm will
remain in the Alarm list as Inactive.
Note: The input SD OVERRIDE (PAGE 460) can be used for temporary disabling of red alarms to shutdown the
engine. This input may be used in situations where providing the power is extremely important – e.g. if the
Gen-set drives pumps for fire extinguishers (sprinklers).
To Next Page
Loading...
Need help?
General
