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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.

368

SERIAL DATA ERROR(INT)

Fanuc · Series 30i/31i/32i-MODEL B Plus

What does 368 mean?

This internal alarm indicates an interruption in serial communication, possibly due to a disconnected cable, a Pulse coder failure, or electrical noise. Loss of serial data communication prevents the control unit from receiving vital feedback information.

Common Causes

  • Communication interruption with the Pulse coder
  • Cable disconnection in the feedback loop
  • Pulse coder failure
  • Noise interfering with serial data transmission

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check whether the feedback cable is not disconnected and whether the connector is properly plugged.

  2. 2

    Replace the Pulsecoder.

Browse all codes in this manual (38)
Verified technical data. Last updated: April 2026

Related Faults

1Inverter Internal Cooling Fan Stopped2Inverter Control Power Supply Undervoltage366PULSE MISS(INT)
Source: Fanuc Series 30i/31i/32i-MODEL B Plus
Open Manual (Page 159)Search more codes in this manual