IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
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Gen-set operation states
Gen-set can operate in following states
Not ready Gen-set is not ready to start
Init After controller power supply switch on
Ready Gen-set is ready to run
Prestart Prestart sequence in process.
From closing of Prestart output to closing of Starter output.
Cranking Engine is cranking; Starter output is closed
Pause Pause between start attempts
Starting Engine params:Starting RPM is reached
Running Waiting for GCB connection
Warming After GCB is closed to parallel operation, gen-set load is reduced Engine
params:Warming load
Soft load Gen-set power is ramping up
Loaded Gen-set is loaded
Soft unld Gen-set power is ramping down
Cooling Gen-set is cooling before stop
Stop Stop
Shutdown Shutdown alarm activated
Ventil Gas engine – ventilation of unburned fuel when stop command comes during
cranking with gas
SDVentil Gas engine – ventilation of unburned fuel after unsuccessful start attempt
Off load GCB is opened, gen-set keeps running on nominal RPM
Emerg man Emergency manual state – see Emerg. manual BI description
External gen-set conditions :
MainsOper Mains is present (MCB is closed, GCB is opened)
Brks Off GCB, MCB opened
RPM match RPM matching is active (MCB is closed, GCB is
opened)
ParalOper Gen-set is in parallel with mains (MCB is closed,
GCB is closed)
MainsOper/Brks Off Engine is running idle
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