Drives error PMx no.: 71
KPS Microcontroller Crash
Kuka · KR C2 Robot Controller
What does Drives error PMx no.: 71 mean?
The microcontroller within the KPS module (PMx) has crashed. This indicates an internal hardware or firmware malfunction of the KPS.
Common Causes
- Microcontroller on the KPS drive has crashed or is unresponsive.
- Unexpected software exception or hardware fault.
- Watchdog timer expired due to system unresponsiveness.
- Critical internal error in the drive's processing unit.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Restart the KPS module.
- 2
If the error persists, exchange the KPS module.
Verified technical data. Last updated: March 2026
Related Faults
Source: Kuka KR C2 Robot Controller