Sinumerik Alarm 4290 Local P-bus sign-of-life monitoring
Definitions:
The COM computer must alter the sign-of-life on the local P-bus in each SERVO cycle. Monitoring for alteration takes place in the IPO cycle. If the sign of life has not altered, this alarm is triggered.
Reactions:
– Alarm display.
– Interface signals are set.
– NC not ready.
– Channel not ready.
– NC Start disable in this channel.
– NC Stop on alarm.
Remedy:
Please inform the authorized personnel/service department. Check hardware.
Program Continuation:
Switch control OFF – ON.
References
- Siemens Diagnostics Guide by Siemens