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
Ensure all protective doors are closed and securely latched before and during the brake test.
- 2
Verify that the drive is ready (drive-ready signal is active) before initiating and throughout the brake-test call monitoring.
- 3
Check the status of safety door interlocks and associated sensors for correct operation.
- 4
Inspect wiring for protective door switches and drive-ready signal for integrity and proper connection.
Verified technical data. Last updated: March 2026
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Source: Heidenhain TNC CNC Controllers