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

  1. 1

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

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Verified technical data. Last updated: March 2026
Source: Fanuc Series 30i/31i/32i-MODEL B Plus
Fanuc Error E0: Sensor (serial) one-rotation signal pulse count out of range — Troubleshooting Guide | ErrorLib