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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.

0x009A

Basic I/O Error

Omron · CJ-series CJ2 CPU Unit

What does 0x009A mean?

An error has occurred in a Basic I/O Unit, indicated by A402.12 and A408. This suggests a potential hardware issue or component failure within the unit, such as a blown fuse, leading to a loss of I/O functionality.

Common Causes

  • An internal error has occurred in a Basic I/O Unit.
  • A fuse within the Basic I/O Unit may be blown.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the Basic I/O Unit indicated by A408 for visible damage or blown fuses.

  2. 2

    Replace any blown fuses in the Basic I/O Unit.

Browse all codes in this manual (34)
Verified technical data. Last updated: April 2026

Related Faults

009ABasic I/O Error0x008BDuplicated Refreshing Error0x009BPLC Setup Error
Source: Omron CJ-series CJ2 CPU Unit
Open Manual (Page 394)Search more codes in this manual