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231-A840

CC SBH rot. speed too high %1

Heidenhain · TNC CNC Controllers

Was bedeutet 231-A840 ?

This error indicates that the maximal permissible velocity of the standstill monitoring (SBH - Safe Brake Hold or Safe Operating Stop) was exceeded. This means the system detected motion when it should have been at a standstill or within a very low-speed threshold.

Häufige Ursachen

  • The maximal permissible velocity of the standstill monitoring (SBH) was exceeded.
  • Drive is still moving or rotating above the allowed threshold when SBH is active.
  • Faulty encoder or feedback system providing incorrect speed information.
  • Incorrect standstill monitoring parameters.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Verify that the drive and axis are indeed at a complete standstill when SBH is activated.

  2. 2

    Inspect the drive system for any unintended movement, binding, or external forces causing motion.

  3. 3

    Check the encoder feedback system for the affected drive; inspect the encoder itself, its wiring, and connections for damage or signal integrity issues.

  4. 4

    Review parameters related to standstill monitoring (SBH) velocity thresholds and ensure they are configured correctly for the application.

  5. 5

    Observe the actual speed feedback in diagnostics to confirm its accuracy when SBH is active.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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