423
Speed Exceeds Limit
Fanuc · αi series AC Servo Motor
What does 423 mean?
This alarm indicates that the specified speed exceeds 32767000 detection units per second. This suggests an incorrect configuration of motion parameters, potentially leading to instability or performance issues.
Common Causes
- Speed setting (CMR) is too high
- CMR (Compound Motion Ratio) setting is incorrect
Repair Steps
- 1
Re-examine and adjust CMR settings
- 2
Re-examine and adjust speed settings
Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor