Nck Alarms; Plc Sign-Of-Life Monitoring; Plc Has Not Started Up - Siemens Sinamics S120 Diagnostic Manual

NCK alarms

Product: Solutionline_828, Version: V12.0, Language: eng,
Objects:
2000

PLC sign-of-life monitoring

Definitions: The PLC must give a sign of life within a defined period of time (MD10100 $MN_PLC_CYCLIC_TIMEOUT). If this does
not occur, the alarm is triggered.
The sign of life is a counter reading on the internal NC/PLC interface which the PLC causes to count up with the 10
ms time alarm. The NCK also tests cyclically whether the counter reading has changed.
The PLC must give a sign of life within a defined period of time. If this does not occur, this alarm is triggered.
Reaction: NC not ready.
Local alarm reaction.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Please inform the authorized personnel/service department. Check monitoring time frame in MD10100
$MN_PLC_CYCLIC_TIMEOUT (reference value: 100ms).
Establish the cause of the error in the PLC and eliminate it (analysis of the ISTACK. If monitoring has responded with
a loop in the user program rather than with a PLC Stop, there is no ISTACK entry).
This alarm is also caused by PLC stop.
(PLC stop with programming tool,
PLC stop by commissioning switch,
PLC stop by alarm)
If none of these cases applies, please contact the hotline mentioned at the beginning of this document and provide
the operating system error number.
Program Switch control OFF - ON.
Continuation:
2001

PLC has not started up

Definitions: The PLC must give at least 1 sign of life within a period of time defined in MD10120
$MN_PLC_RUNNINGUP_TIMEOUT (default: 1 sec.).
The PLC must give at least 1 sign of life within the defined period of time after Power ON.
Reaction: NC not ready.
Local alarm reaction.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: - Please inform the authorized personnel/service department. The monitoring time in MD10120
$MN_PLC_RUNNINGUP_TIMEOUT must be checked and adapted to the first OB1 cycle.
- Determine the cause of error in the PLC (loop or stop in the user program) and eliminate it.
Contact the hotline mentioned at the beginning of this documentation.
Program Switch control OFF - ON.
Continuation:
Alarms
Diagnostics Manual 07/2010, 6FC5398-8BP40-0BA0
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