090
Reference Position Setting Error
Fanuc · αi series AC Servo Motor
What does 090 mean?
Reference position setting could not be executed normally. This indicates a failure in establishing the machine's reference point.
Common Causes
- Failure to establish the reference position during the setting procedure.
- Servo position error is not exceeding 128 when moving in jog mode for reference position return.
Repair Steps
- 1
Move the tool in the direction of reference position return in jog mode at a speed that causes the servo position error to exceed 128. Then, specify another reference position setting.
Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor