Watchdog power module PMx

KPS Watchdog Error (Servo Bus Communication)

Kuka · KR C2 Robot Controller

What does Watchdog power module PMx mean?

The maximum permissible number of communication errors with the servo bus has been exceeded by the KPS power module (PMx). This watchdog error causes short-circuit braking.

Repair Steps

  1. 1

    Check the field bus – drives cable for proper connection, integrity, and shielding between all connected modules.

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Verified technical data. Last updated: March 2026