F3111

Refer. missing when selecting safety related end pos.

Bosch Rexroth · IndraDrive MPx02

What does F3111 mean?

This non-fatal safety technology error indicates that a safety-related reference or datum is missing when attempting to select a safety-related end position. This prevents the drive from reliably establishing its safe operating limits, impacting safety functions like Safe Limited Position (SLP).

Common Causes

  • Safety reference point for the axis has not been set or is corrupted.
  • Encoder fault preventing accurate position feedback for safety functions.
  • Incorrect configuration of safety parameters related to reference positions (e.g., S-0-0193, S-0-0194).
  • Problem with the safety encoder or its connection to the IndraDrive MPx02.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that the safety reference point for the axis has been correctly established and stored according to the machine's commissioning procedure.

  2. 2

    Check the primary and secondary encoder feedback signals for integrity and proper operation.

  3. 3

    Review safety parameters in the IndraDrive MPx02, specifically those defining reference positions and safety limits, to ensure correct configuration.

  4. 4

    Inspect the wiring and connections of the safety encoder for damage, loose terminals, or improper shielding.

  5. 5

    If an external safety PLC is used, verify its programming and communication with the IndraDrive MPx02 regarding reference position management.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Bosch Rexroth IndraDrive MPx02