F406

Phase switching without ready signal

Indramat · CLM01.3-M Flying Cutoff Control

What does F406 mean?

The SERCOS master attempted a phase switch without waiting for the drive controller’s ready signal, indicating an error in the SERCOS master module of the control system.

Common Causes

  • Error in the SERCOS master module of the control system.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Review the SERCOS master controller's diagnostic messages and event logs for further details regarding the premature phase switch attempt.

  2. 2

    Verify the SERCOS communication parameters and timing settings in the master controller to ensure they align with the requirements of the Indramat DIAX04 SSE-03VRS drive controllers.

  3. 3

    Check the firmware version of the SERCOS master module for any known issues or required updates.

  4. 4

    Monitor the ready signal status from the Indramat DIAX04 SSE-03VRS drive controllers to confirm they are indeed reporting their ready state correctly.

  5. 5

    If the problem persists and appears to originate from the master controller's logic or hardware, consult the control system manufacturer for advanced diagnostics or potential module replacement.

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Verified technical data. Last updated: March 2026

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Source: Indramat CLM01.3-M Flying Cutoff Control