6.4.2 Gas engine
The setpoint Fuel Solenoid must be switched to the GAS position.
1. After the command for start is issued (pressing START button in MAN mode, auto start
condition is fulfilled in AUT mode or controller is switched to TEST mode), the output Prestart
is energized for time period given by the setpoint Prestart Time.
2. After the prestart has elapsed, the starter motor is activated by energizing the output Starter.
3. When the engine speed exceeds 30RPM, the outputs Fuel Solenoid and Ignition are
energized.
4. When the engine speed exceeds value of Starting RPM, the starter motor is de-energized, the
engine is considered as started and the Idle period will follow.
CAUTION!
Additional running indication signals are not evaluated during the start of a gas engine. The
Pickup must be used in any case!
5. The maximum duration the starter motor is energized is determined by the setpoint MaxCrank
Time. If the engine does not start within this period, the starter motor and fuel solenoid are de-
energized and a pause with a length determined by CrnkFail Pause will follow. Prestart output
and ignition remain active during the pause. After the pause has elapsed, the next start
attempt is executed. The number of start attempts is given by the setpoint Crank Attempts.
6. Once the engine is started, the Idle period follows. The binary output Idle/Nominal remains
inactive (as it was during the start). The idle period duration is adjusted by the setpoint Idle
Time.
7. After the idle period has finished, the output Idle/Nominal is activated and the start-up
sequence is finished. The stabilization phase follows.
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