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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.

E0

Sensor (serial) one-rotation signal pulse count out of range

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

What does E0 mean?

The number of pulses detected between one-rotation signals from the serial sensor falls outside the specified acceptable range. This alarm specifically points to an abnormality in the sensor's detection circuit, indicating a malfunction in its ability to accurately measure rotational position.

Common Causes

  • Detection circuit of the sensor (serial) is abnormal

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Replace the detection circuit component within the sensor (serial).

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
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