447
High Velocity Deviation
Fanuc · Alpha i series AC Servo Motor
What does 447 mean?
The velocity deviation is too high, indicating a problem in the velocity control loop. This could be due to an actual velocity that does not match the commanded velocity or improper parameter settings, leading to poor motion control.
Common Causes
- Actual velocity does not match commanded velocity
- Parameter No.136 is incorrectly set
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the actual velocity
- 2
Verify and adjust the settings of parameter No.136
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i series AC Servo Motor