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Operation 4‐7MN2408
Table 4‐15 Engine Setpoints
Start RPM “Firing” speed when iL controller stops cranking (starter goes OFF).
Step: 1% of nominal RPM; Range: 5 - 50 %
Starting POil When reached controller stops cranking (starter goes OFF).
Step: 0,1 psi; Range: -100 - 10000
Note: There are three conditions for stop cranking: Starting RPM,
StartingPOil and D+ (when enabled). Starter goes off when any
of these conditions is valid.
Prestart time Time of closing of the PRE-START output prior to the engine start.
Set to zero if you want to leave the output PRE-START open.
Step: 1s; Range: 0 - 600 s
MaxCrank time Maximum time limit of cranking. Step: 1s; Range: 1 - 60 s
CrnkFail pause Pause between crank attempts. Step: 1s; Range: 5 - 60 s
Crank attemps Max number of crank attempts. Step: 1; Range: 1 - 10
Idle time Idle time delay starts when RPM exceeds Start RPM . Start fail is detected
when during Idle state RPM decreases below 2.
During the Idle time timer running the binary output IDLE/NOMINAL is
opened, when it elapses the IDLE/NOMINAL output closes.
Binary output IDLE/NOMINAL opens during Cooling period again.
Step: 1 s; Range: 0 - 600 s
Note: If the IDLE function not supported on the governor, set the Idle time
nevertheless to minimum 5s to avoid Underspeed possibly
caused by instability of the engine short after start.
GCB CloseDelay GCB can be closed earliest GCB CloseDelay after Stabil time when all
electric values are in overunder voltage and over-under frequency limits.
Step: 1 s; Range: 0 - 300 s
Stabil time Generator Nominal voltage is detected during genset start after starter is
switched off and Idle time elapses. Electric generator protections are
active since detection. Step: 1 s; Range: 0 - 300 s
MinStpValvTime Binary output Stop solenoid closes when stop sequence begins and
closes at least for MinStpValvTime. Example MinStpValvTime = 20 sec.
a) When engine stops (RPM=0) in 10 seconds, Binary output Stop
solenoid still stays closed for 10 sec.
b) When engine stops in 30 seconds, Binary output Stop solenoid opens
10 seconds after RPM=0 and Vg =0 and Oil pressure = 0. Those 10 sec is
fix time for safe stop. Step: 1s; Range: 0 - 180 s
Note: Stop of engine is detected when all following conditions are met:
RPM =0, Oil pressure < StartingPOil and Generator voltage < 10 VAC.
Stop fail is detected when is difference between those conditions, e.g
RPM=O and Generator voltage > 10V.
Start RPM
RPM
BāOā Sā tarter
BāOā IDLEā/RAāTāEāD
RPM = 2
RPM
Start Fail
Idle timāe Māin stab timāe
Electric protections
activāe
Idle Function
Stabil Time