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231-F200

No brake line test was conducted %1

Heidenhain · TNC CNC Controllers

What does 231-F200 mean?

This error indicates that the Machine Control (MC) unit of the Heidenhain TNC CNC Controller failed to perform a required test of the motor brake line, as mandated by parameter settings. The test might also exceed its maximum allowed duration of 10 seconds. This suggests a potential issue in the electrical circuit controlling the brake, compromising safety by not verifying the integrity and responsiveness of the brake line.

Common Causes

  • Incorrect parameter settings requiring a brake line test, where the conditions for its execution are not met or are misinterpreted.
  • An issue with the wiring of the motor brake line, such as an open circuit, short circuit, or excessively high resistance.
  • A problem with the brake line control output from the drive or safety module, preventing proper signal transmission.
  • The brake line test sequence taking longer than the allowed 10 seconds, indicating an electrical fault or a delay in the control signal.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the controller parameters related to motor brake line testing to confirm that the test is required and that its configuration is correct.

  2. 2

    Perform a thorough inspection of the motor brake line wiring, checking for continuity, insulation integrity, and proper termination at all connection points.

  3. 3

    Measure the voltage and current on the brake line during test activation to ensure correct electrical signals are present and that the line responds as expected.

  4. 4

    Monitor the duration of the brake line test; if it consistently exceeds 10 seconds, investigate for resistance issues, cable damage, or control signal delays.

  5. 5

    If wiring and external components are verified as functional, contact a Heidenhain service agency for diagnostics on the MC unit or the associated safety output module.

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

Related Faults

231-A001Cancelation of brake-test call monitoring231-A002Cancelation of brake-line-test call monitoring231-A003SPLC commissioning mode active
Source: Heidenhain TNC CNC Controllers
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