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ErrorLib — Industrial Fault Code Library

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231-A086

SKERN-CC%2: Communications error during dynamic sampling of X%4

Heidenhain · TNC CNC Controllers

What does 231-A086 mean?

This error indicates that the dynamic sampling of the EnDat22 encoder (X%4) could not be performed within the prescribed time limit. This is a communication timeout issue, suggesting problems with the encoder, its wiring, or the controller's ability to communicate with it.

Common Causes

  • The dynamic sampling of the EnDat22 encoder (X%4) could not be performed within the prescribed time.
  • Faulty EnDat22 encoder or damaged encoder cable.
  • Timing issues or heavy load on the controller preventing timely communication.
  • Electrical interference affecting the EnDat communication.
  • Incorrectly configured encoder parameters or communication settings.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the EnDat22 encoder cable (X%4) for any physical damage, proper shielding, and secure connections.

  2. 2

    Verify the integrity and power supply to the EnDat22 encoder itself.

  3. 3

    Check the controller's diagnostic logs for other concurrent errors that might indicate an overloaded system or internal communication issues.

  4. 4

    Ensure all communication parameters for the EnDat22 encoder are correctly configured according to the manual.

  5. 5

    Test the encoder and its cable separately if possible, or swap components with a known good one if available.

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

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Source: Heidenhain TNC CNC Controllers
Open Manual (Page 464)Search more codes in this manual