IS-NT-Async-SPI, SW Version 1.2, ©ComAp – February 2011
IS-NT-Async-SPI-1.2.PDF
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Horn
The output closes if any alarm comes up. It opens if FAULT RESET or HORN RESET is pressed or if Horn
timeout has elapsed. The output closes again if a new fault comes up.
Horn flashing
If any alarm comes up, the output starts periodic closing/opening with period 1s/1s. It opens and stays open
if FAULT RESET or HORN RESET is pressed or if Horn timeout has elapsed.
Common Hst
The output closes if any “History record”-type alarm appears. The output opens after 1s.
Common MP
The output closes if any “Mains protection”-type alarm appears. The output opens, if no “Mains protection”-
type alarm is active. No FAULT RESET needed.
Common LoP
The output closes if any “Low power”-type alarm appears. The output opens, if no “Low power”-type alarm is
active. No FAULT RESET needed.
Common Al
The output closes if any “Alarm only”-type alarm appears. The output opens, if no “Alarm only”-type alarm is
active and FAULT RESET has been pressed.
Common Wrn
The output closes if any “Warning”-type alarm appears. The output opens, if no “Warning”-type alarm is
active and FAULT RESET has been pressed.
CommonActLev 1
The output is a logical OR of Common Al and Common Wrn outputs.
CommonAlLev 1
The output is active if at least one of the 1
st
level alarms (Al, Wrn) is active or not yet confirmed.
Hint:
See picture below with signal behaviour description. The same behaviour like for “Warning”-type alarm would
be for “Alarm only”.
The same behaviour, but with signals CommonActLev 2 and CommonAlLev 2 would be for
“BreakerOpen&Cool-down”, “Slow stop” and “Shutdown”-type alarms.
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