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
Clean the external detector's sensing surface thoroughly.
- 2
Measure phase signal quality from the external detector output.
- 3
Verify correct mounting and alignment of the external detector.
- 4
Check servo parameter P1-05 (Encoder Software Filter) settings.
- 5
Inspect external detector for any signs of wear or contamination.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i Series Servo Amplifier