RS

Reference Stop - Impermissible Operating Mode

Kuka · ProfiNet Controller/Device 3.1

What does RS mean?

This signal indicates that a reference stop has occurred because the robot is operating in a mode not permitted for referencing. Reference runs are strictly confined to operating modes T1 (Teach mode 1) and CRR (Continuous Run Robot).

Common Causes

  • Device entered an impermissible operating mode, preventing startup.
  • Safety interlock active, blocking the requested operating mode.
  • Emergency stop condition active.
  • Incorrect sequence of operations initiated by the control system.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Before attempting a reference run, ensure the robot controller's operating mode is set to either T1 or CRR.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Kuka ProfiNet Controller/Device 3.1