251

Invalid Input Data 2

Fanuc · αi series AC Servo Motor

What does 251 mean?

Input data 2 specified with a function code is invalid. This indicates an issue with the format or value of the second input data.

Common Causes

  • Invalid input data 2 specified via a function code.

Repair Steps

  1. 1

    Check the input data 2 value specified with a function code.

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Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor
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