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.

Repair Steps

  1. 1

    Verify that the brakes for the specified external axis channel are correctly connected at the KPS and motor.

  2. 2

    Check the brake cable for the external axis channel for any short circuits or damage.

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Verified technical data. Last updated: March 2026