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ErrorLib — Industrial Fault Code Library

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40030000 hex

PLC System Processing Error

Omron · NX-series CPU Unit

What does 40030000 hex mean?

A fatal error was detected in the PLC Function Module. This error is continuously detected, indicating a major fault level. User program execution and controller operation will stop immediately.

Common Causes

  • An error occurred in the software.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Cycle the power supply to the Controller.

  2. 2

    If the error persists, contact your OMRON representative for software error investigation.

Browse all codes in this manual (17)
Verified technical data. Last updated: April 2026

Related Faults

00090000 hexDIP Switch Setting Error000D0000 hexInternal Bus Check Error000E0000 hexNon-volatile Memory Life Exceeded
Source: Omron NX-series CPU Unit
Open Manual (Page 259)Search more codes in this manual