Brake error Ax/PMx channel x
External Axes Brake Error
Kuka · KR C2 Robot Controller
What does Brake error Ax/PMx channel x mean?
A brake error has occurred on the external axes, specified by channel x. This could be due to the brakes not being connected or a short-circuit present on the brake cable.
Common Causes
- External axis brake circuit has an error on channel (x).
- Mechanical brake failure on the external axis.
- Wiring or connection issue with the external axis brake actuator.
- Control signal error for the external axis brake engagement.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify that the brakes for the specified external axis channel are correctly connected at the KPS and motor.
- 2
Check the brake cable for the external axis channel for any short circuits or damage.
Verified technical data. Last updated: March 2026
Related Faults
Source: Kuka KR C2 Robot Controller