CC SBH rot. speed too high %1
Heidenhain · TNC CNC Controllers
What does 231-A840 mean?
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.
Common Causes
- 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.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify that the drive and axis are indeed at a complete standstill when SBH is activated.
- 2
Inspect the drive system for any unintended movement, binding, or external forces causing motion.
- 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
Review parameters related to standstill monitoring (SBH) velocity thresholds and ensure they are configured correctly for the application.
- 5
Observe the actual speed feedback in diagnostics to confirm its accuracy when SBH is active.