231-E003

PLC module 9169 illegal

Heidenhain · TNC CNC Controllers

What does 231-E003 mean?

This error indicates that PLC module 9169 has been detected in safety-oriented software as illegal, implying a software error. This module is likely not permitted or improperly configured within the safety context of the system.

Common Causes

  • PLC module 9169 in safety-oriented software is identified as illegal.
  • Software error within the safety kernel or PLC program.
  • Incompatibility between the PLC program and the safety-oriented software version.
  • Incorrect or unauthorized PLC module configuration for safety applications.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the PLC program for any references or usages of module 9169 within safety-related functions and remove or reconfigure if inappropriate.

  2. 2

    Verify the software version of the controller and the PLC program; ensure they are compatible and updated to the latest stable release.

  3. 3

    Consult the Heidenhain documentation to confirm if PLC module 9169 is permitted for use in safety-oriented applications with your specific controller.

  4. 4

    If the module is intentionally used, verify its configuration against safety guidelines and ensure it meets all functional safety requirements.

Browse all codes in this manual (47)
Verified technical data. Last updated: March 2026

Related Faults

Source: Heidenhain TNC CNC Controllers