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ErrorLib — Industrial Fault Code Library

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090

Reference Position Setting Error

Fanuc · Alpha i 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 & Checklist

Click steps to track your progress.

  1. 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.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

000Power-Down Required Parameter011Zero Feedrate Specified013Maximum Feedrate Zero
Source: Fanuc Alpha i series AC Servo Motor
Open Manual (Page 222)Search more codes in this manual