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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.

04C40000 hex

Sensor Communications Error

Omron · NJ/NX-series Machine Automation Controller

What does 04C40000 hex mean?

This error indicates a problem in the connection to a sensor, leading to a disruption in communications. It implies a physical connection issue or a fault in the sensor itself, affecting data exchange within the E3X-series Fiber Sensor system.

Common Causes

  • The Sensor is disconnected.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the physical connection of the sensor cable.

  2. 2

    Ensure the sensor cable is securely terminated at both ends.

Browse all codes in this manual (96)
Verified technical data. Last updated: April 2026

Related Faults

04A10000Non-volatile Memory Hardware Error04A10000 hexNon-volatile Memory Hardware Error04AC0000 hexOvercurrent
Source: Omron NJ/NX-series Machine Automation Controller
Open Manual (Page 278)Search more codes in this manual