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ErrorLib — Industrial Fault Code Library

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447

High Velocity Deviation

Fanuc · Alpha i series AC Servo Motor

What does 447 mean?

The velocity deviation is too high, indicating a problem in the velocity control loop. This could be due to an actual velocity that does not match the commanded velocity or improper parameter settings, leading to poor motion control.

Common Causes

  • Actual velocity does not match commanded velocity
  • Parameter No.136 is incorrectly set

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the actual velocity

  2. 2

    Verify and adjust the settings of parameter No.136

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 230)Search more codes in this manual