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ErrorLib — Industrial Fault Code Library

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231-A001

Cancelation of brake-test call monitoring

Heidenhain · TNC CNC Controllers

What does 231-A001 mean?

This error indicates that the brake-test call monitoring was canceled. This typically happens if protective doors are opened during the brake test, or if the drive-ready signal is not present during the monitoring period.

Common Causes

  • Protective door(s) were opened during the brake test.
  • No drive-ready signal was present during the brake-test call monitoring.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure all protective doors are closed and securely latched before and during the brake test.

  2. 2

    Verify that the drive is ready (drive-ready signal is active) before initiating and throughout the brake-test call monitoring.

  3. 3

    Check the status of safety door interlocks and associated sensors for correct operation.

  4. 4

    Inspect wiring for protective door switches and drive-ready signal for integrity and proper connection.

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

Related Faults

231-A002Cancelation of brake-line-test call monitoring231-A003SPLC commissioning mode active231-A004Short circuit on 24 V of the T.BRK.B signal
Source: Heidenhain TNC CNC Controllers
Open Manual (Page 454)Search more codes in this manual