Sinumerik Alarm 28033 Emergency stop on NCU % 1, axes still in follow-up mode
%1 = NCU number
The emergency stop request is active at the PLC-NCK interface on one NCU of the NCU network. Consequently, all axes are trailing.
– Alarm display.
– Interface signals are set.
– NC not ready.
– Mode group not ready, also effective for single axes
– NC Start disable in this channel.
– NC Stop on alarm.
Remedy the cause of the emergency stop on the NCU and acknowledge the emergency stop via the PLC-NCK interface.
Alarm display showing cause of alarm disappears. No further operator action
- Siemens Diagnostics Guide by Siemens