EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. R-30iB Mate + Mate Plus Robot
  4. SRVO-090
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.

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.

Common Causes

  • Communication error in the data stream from the line tracking pulsecoder.
  • Noise or interference corrupting data sent by the line tracking pulsecoder.
  • Damaged cable or connector between the line tracking pulsecoder and controller.
  • Faulty line tracking pulsecoder unit transmitting erroneous data.
  • Servo controller not properly interpreting received data packets.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the connection cable at each end (the line tracking board and the Pulsecoder).

  2. 2

    Check whether the shielding of the connection cable is securely connected to the grounding plate.

  3. 3

    Replace the Pulsecoder.

  4. 4

    Replace the line tracking cable.

  5. 5

    Replace the line tracking board.

Browse all codes in this manual (53)
Verified technical data. Last updated: April 2026

Related Faults

24EXTEmergency Stop Circuit 24V Fault24TTeach Pendant 24V FaultALM LED Blink (1:1)Broken Wire or Noise (Subsequent Unit)
Source: Fanuc R-30iB Mate + Mate Plus Robot
Open Manual (Page 87)Search more codes in this manual