383
PULSE MISS(EXT)
Fanuc · Series 30i/31i/32i-MODEL B Plus
What does 383 mean?
This external alarm indicates a small internal signal amplitude from the separate detector, usually caused by the detector's failure. A weak signal can lead to unreliable position feedback.
Common Causes
- Small internal signal amplitude from the separate detector
- Separate detector failure
Repair Steps
- 1
Replace the detector.
Verified technical data. Last updated: March 2026
Source: Fanuc Series 30i/31i/32i-MODEL B Plus