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ErrorLib — Industrial Fault Code Library

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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.

Browse all codes in this manual (31)
Verified technical data. Last updated: April 2026

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E219Warning Drive temp. surveillance defectiveE221Warning Motor temp. surveillance defectiveE225Motor overload
Source: Indramat CLM01.3-M Flying Cutoff Control
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