IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
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Hint:
The output also closes if the engine begins to rotate spontaneously. It stays closed until “still engine”
condition is achieved + additional 5s.
Intended only for diesel engines, especially marine ones.
Stop pulse
1s pulse for engine stop command, intended for ECU connection.
Prestart
The output closes prior to the engine start (time defined by Prestart setpoint) and opens when Starter output
opens the last time during starting sequence. During repeated crank attempts the output is constantly closed.
The output can be used for pre-glow, pre-heat or prelubrication.
Ignition
Intended to activate the ignition unit of gas engines. The output closes immediately as “engine running”
condition is detected and opens after the engine stop (“still engine” condition). The function is independent
on other conditions, i.e. always if “engine running” is detected, the output activates.
The output opens immediately when BI Emergency stop gets active.
Hint:
In case of repeated start:
a) the output is switched on when RPM = 30 (it is fixed value)
b) the output is switched off during Crank pause, but not untill RPM fell down to 0
c) the output is switched off by STOP command when RPM=0
Ventilation
Intended for the engine ventilator control. The output closes together with Prestart output and opens after the
engine stop (“still engine” condition).
The output opens immediately when BI Emergency stop gets active or in OFF mode.
Idle/Nominal
The output closes with transition from Starting (Idle) to Running state. It opens either with transition to
Cooling state (if Cooling speed = IDLE), or after the command to stop the engine (if Cooling speed =
NOMINAL).
The closed output means that Nominal RPM are requested.
Hint:
Connect this output to the speed governor to switch the requested speed: opened = IDLE RPM,
closed=Nominal RPM.
Cooling pump
The output closes when gen-set starts (“engine started” condition) and opens AfterCoolTime delayed after
the engine stop (“still engine” condition).
The output opens immediately when BI Emergency stop gets active or in OFF mode.
Prelubr pump
If engine is not running, the output closes with period Prelubr pause for Prelubr time.
The output opens immediately when BI Emergency stop gets active or in OFF mode.
Not lubricated
Output indicates the lubrication cycle (PrelubrTime) is not finished after controller Switch-on or return from
OFF mode or deactivation of Emergency stop signal.
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