CC speed greater than SRG %.2s
Heidenhain · NC Control
What does 7952 A820 mean?
The maximum permissible velocity in the SRG (Safe Reduced Speed) operating mode was exceeded for the specified axis. This indicates a safety violation where the axis moved too fast for the active safe reduced speed conditions.
Common Causes
- Maximum permissible velocity in the SRG operating mode was exceeded.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Reduce the programmed feed rate and shaft speed before opening the safety doors or engaging SRG operating mode.
- 2
Verify the position of the key-operated switch to ensure the correct operating mode (e.g., BA2, BA3, BA4, Special operation) is selected and active.
- 3
Check the parameter values: MP540.x/MP541 (Operating mode BA3/BA4), MP552.x/MP551 (Special operation), and MP590.x/MP591 (Operating mode BA2) to confirm their settings match the machine's safety configuration.
- 4
Inspect the safety door interlocks and the axis speed monitoring system for proper function and calibration.