0843

Flexible Feed Gear Numerator Error

Fanuc · Alpha i Series Servo Amplifier

What does 0843 mean?

This invalid parameter setting alarm occurs when a positive value is not set as the flexible feed gear numerator, or when the numerator's value is greater than the denominator. This applies to systems other than parallel type separate detectors and indicates an invalid gear ratio configuration.

Common Causes

  • The numerator value in the flexible feed gear ratio calculation has exceeded its limit.
  • An unexpected high value was read from a sensor involved in gear ratio determination.
  • Configuration of the flexible feed gear's numerator parameter is incorrect.
  • Mechanical issue causing an abnormally high reading for the gear's numerator.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set a positive value for the flexible feed gear numerator.

  2. 2

    Correct the parameter so that the numerator of the feed gear is less than or equal to the denominator.

Browse all codes in this manual (101)
Verified technical data. Last updated: March 2026

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Source: Fanuc Alpha i Series Servo Amplifier