EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. Alpha i Series Servo Amplifier
  4. SV0384
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

SV0384

SOFT PHASE ALARM(EXT)

Fanuc · Alpha i Series Servo Amplifier

What does SV0384 mean?

The digital servo software detected abnormal data on the separate detector, specifically related to its phase. This is a software-detected issue with the external detector's feedback.

Common Causes

  • Signal integrity issues with the phase data from the external detector.
  • Physical damage or debris on the external detector's sensing surface.
  • Malfunction of the external detector's internal phase processing logic.
  • Incorrect installation or calibration of the external detector.
  • Environmental factors (temperature, vibration) impacting signal stability.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Clean the external detector's sensing surface thoroughly.

  2. 2

    Measure phase signal quality from the external detector output.

  3. 3

    Verify correct mounting and alignment of the external detector.

  4. 4

    Check servo parameter P1-05 (Encoder Software Filter) settings.

  5. 5

    Inspect external detector for any signs of wear or contamination.

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

Related Faults

0233Velocity Pulse Count Exceeded0243Position Pulse Count Exceeded0434Velocity Loop Integral Gain Overflow
Source: Fanuc Alpha i Series Servo Amplifier
Open Manual (Page 127)Search more codes in this manual