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ErrorLib — Industrial Fault Code Library

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231-A080

CC%2 operating state not equal MC

Heidenhain · TNC CNC Controllers

What does 231-A080 mean?

This error indicates a discrepancy between the operating conditions of the MC (Machine Control) and CC (Controller) modules. Specifically, the automatic, SRG (Reduced Speed), SBH (Standstill Monitoring), and SH (Safe Hold) operating conditions are cyclically compared, and if they remain unequal for longer than 500 ms, a Stop 1 safety reaction is triggered.

Common Causes

  • Automatic, SRG, SBH, and SH operating conditions are unequal between MC and CC for >500 ms.
  • Mismatched software versions between MC and CC.
  • Communication error between MC and CC leading to inconsistent status reporting.
  • Internal software error within MC or CC modules.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Acknowledge the error message with CE on the HMI.

  2. 2

    Attempt to switch on the machine to see if the error clears and conditions synchronize.

  3. 3

    Verify that the software versions of both the MC and CC modules are compatible and up-to-date according to Heidenhain documentation.

  4. 4

    Check the communication links (e.g., cables, bus terminations) between the MC and CC for integrity and proper functioning.

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 457)Search more codes in this manual