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F100:0A

Output Size Mismatch

Beckhoff · EL6900 Operating Instructions

What does F100:0A mean?

This CoE object indicates that the length of the output data does not match the output data length calculated from the safety logic. This signals a configuration error between the EtherCAT master and the safety project concerning the expected output data size from the EL6900, which can lead to improper control or safety functions.

Common Causes

  • The size of the output data configured in the application does not match the expected size from the hardware or communication interface.
  • Mismatched output mapping between the PLC and the physical I/O modules.
  • Incorrect parameter P1-34 (Output configuration) in the safety device.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the configured output data length for the EL6900 in the EtherCAT master configuration (e.g., TwinCAT System Manager).

  2. 2

    Compare the configured output data length with the length calculated and expected by the compiled safety logic project.

  3. 3

    Ensure that the TwinSAFE safety project has been correctly compiled and downloaded to the EL6900, matching the current hardware configuration.

Browse all codes in this manual (16)
Verified technical data. Last updated: April 2026

Related Faults

0005 hexMaximum Temperature Exceeded0006 hexTemperature Fell Below Minimum0007 hexTemperature Difference Exceeded
Source: Beckhoff EL6900 Operating Instructions
Open Manual (Page 55)Search more codes in this manual