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: March 2026

Related Faults

Source: Fanuc Alpha i Series Servo Amplifier