231-A085
SKERN-CC%2, X%4: Comm.error during EnDat encoder dynamic sampling
Heidenhain · TNC CNC Controllers
What does 231-A085 mean?
A communication error occurred during the forced dynamic sampling of the EnDat encoder (X%4). This specific error indicates that both ignore flags were set at the same time, which is an invalid state during dynamic sampling.
Common Causes
- Communication error during forced dynamic sampling of the EnDat encoder (X%4).
- Both ignore flags were set simultaneously, indicating an invalid state in the encoder communication protocol.
- Faulty EnDat encoder or encoder cable.
- Interference on the EnDat communication line.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Inspect the EnDat encoder cable (X%4) for damage, proper shielding, and secure connections at both the encoder and controller ends.
- 2
Verify the integrity of the EnDat encoder; check for physical damage or signs of malfunction.
- 3
Check for sources of electromagnetic interference (EMI) near the encoder cable run.
- 4
Ensure the controller's software and firmware are up-to-date and compatible with the EnDat encoder.
Verified technical data. Last updated: March 2026
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Source: Heidenhain TNC CNC Controllers