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ErrorLib — Industrial Fault Code Library

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386

DATA TRANS. ERROR(EXT)

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

What does 386 mean?

This external alarm signals a communication data error from the separate detector, primarily caused by noise. Unstable position data from the separate detector can lead to erratic or inaccurate control.

Common Causes

  • Noise causing unstable position data from the separate detector.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check CNC diagnosis information No.356 (Built-in detector) and No.357 (Separate detector) for incremented values, which indicate noise effects. The value is cleared when the CNC unit is powered off.

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

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Source: Fanuc Series 30i/31i/32i-MODEL B Plus
Open Manual (Page 159)Search more codes in this manual