Sinumerik Alarm 300508 Axis %1 drive %2 zero mark monitoring of motor measuring system
Parameters:
%1 = NC axis number
%2 = Drive number
Definitions:
An error was detected in the number of encoder lines counted to modulo (16/10) on crossing of the zero marker. Increments were lost or added. The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY (channel not ready).
Reactions:
– Mode group not ready.
– Channel not ready.
– Channel not ready.
– NC Start disable in this channel.
– NC Stop on alarm.
– The NC switches to follow-up mode.
– Alarm display.
– Interface signals are set.
Remedy:
Please inform the authorized personnel/service department.
• Use original Siemens encoder cables (they have a higher degree of screening).
• Check the encoder, encoder cable and shield connection for loose contact or cable breakage.
• Check the shield connection on the front plate of the controller module (top screw).
• For a gearwheel encoder, check the distance between the gearwheel and the sensor.
• Replace the encoder, encoder cable or control module.
• Check the metallized intermediate circuit cover.
• If a BERO proximity switch is used, the zero marker of the encoder is still being monitored and not the BERO signal.
Program Continuation:
Switch control OFF – ON.
References
- Siemens Diagnostics Guide by Siemens