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ErrorLib — Industrial Fault Code Library

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xxxx 0011

Invalid Connection ID

Beckhoff · TwinSAFE Logic FB

What does xxxx 0011 mean?

The FSoE connection ID used in communication is invalid or does not match the expected ID configured in the devices. This prevents the establishment or continuation of a secure safety connection, rendering the system inoperable due to a breakdown in trusted communication.

Common Causes

  • Invalid Connection Identifier (ID) received.
  • Attempted to communicate with a non-existent or wrong device ID.
  • Network configuration error.
  • Incorrectly assigned communication address.
  • Duplicated Connection IDs on the network.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the FSoE connection ID is correctly configured and identical on both the master and slave devices.

  2. 2

    Check the network topology and ensure no duplicate FSoE connection IDs exist within the safety domain.

  3. 3

    Reinitialize the FSoE connection to ensure IDs are properly synchronized.

  4. 4

    Consult the device manual for specific FSoE connection ID setup procedures.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

0x401FPress Not Moving After Start Command0x4020Press Unexpectedly Stopped After Starting0x4021Insufficient Press Movement
Source: Beckhoff TwinSAFE Logic FB
View Official PDFSearch more codes in this manual