SRVO-090
Line Tracking Pulsecoder Communication Data Error
Fanuc · R-30iB Mate + Mate Plus Robot
What does SRVO-090 mean?
Communication between the Pulsecoder and the line tracking board is abnormal, specifically indicating a data error (DTERR). This prevents reliable position feedback for line tracking functions.
Repair Steps
- 1
Check the connection cable at each end (the line tracking board and the Pulsecoder).
- 2
Check whether the shielding of the connection cable is securely connected to the grounding plate.
- 3
Replace the Pulsecoder.
- 4
Replace the line tracking cable.
- 5
Replace the line tracking board.
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot