IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
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PrestartBypass
If the input is closed, the controller bypasses the Prestart time and activates the Starter output immediately.
Hint:
Use this input to bypass the pre-glow / prelubrication time in the case that the engine has run a short time
before.
Oil press
Behavior for Inverted = Open to activate configuration:
Binary input must be closed when engine is not running and opened when it is running. "Sd Oil press B" is
activated when input is opened on not running engine (“still engine” condition) or when stays closed for
Engine protect: RunOnlyBlkDel1 after engine start. "Sd Oil press B" protection is not active when input is
not configured.
Sd override
If the input is closed, all 2
nd
level protections are disabled to allow engine run in an emergency situation, e.g.
sprinkler devices power supply.
All protections are shown in Alarmlist and recorded into History, but the controller doesn’t stop the engine
because of them. If the input is deactivated and some protections are still active or not yet reset, the
controller starts to take these protections into account and consequently stops the engine.
Hint:
All 2
nd
level protections are locked out, except of these:
- Emergency stop
- Overspeed
- Underspeed (only if Fuel solenoid = GAS ENGINE)
Emerg. manual
The controller behaves like when switched to OFF mode if input is closed. Opens all binary outputs Fuel
solenoid, Cooling pump signals, etc... except:
Stop solenoid output does not close.
The output terminals that are configured with inversion are closed.
Detection of "running engine" condition and subsequent alarm message "Sd Stop fail" is blocked. The
controller shows "Emerg Man" state and the engine can not be started. Generator current and power
(energy) measurement is active in this mode, regardless of the actual state of the engine.
After the binary input "Emerg. manual" is open again, the controller recovers to previous mode and behaves
according to the actual situation. Should the engine run and any of the conditions to start the engine was
active, it will keep the engine running.
Function is active in any controller mode and activation of this input is written to history.
Hint:
The function is intended especially for Marine gen-sets which are supposed to be started manually while the
controller has no power supply. To recover successfully from this state, only the signals Stop solenoid, GCB
ON/OFF coil should be used for engine and breaker control, as the other outputs are continuous active
during engine run (e.g. Fuel solenoid) and it is not possible to switch them between more control sources.
RunIndication1
RunIndication 2
RunIndication 3
T Any of three binary inputs can be used for engine running indication e.g. via Oil pressure contact. Active
Running indication blocks engine start (to avoid starter damage).
AccessLock int
If the input is closed, no setpoints can be adjusted from the controller front panel.
Hint:
For IS-NT, this input is controlling the display #1, which is supposed to be attached to or close to the main
module.
As the controller mode (OFF-MAN-AUT) is one of the setpoints, not even that can be changed.
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