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ErrorLib — Industrial Fault Code Library

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RHxx144

Tag Matching Failed

Omron · CS/CJ Series EtherNet/IP Driver

What does RHxx144 mean?

The system failed to match tags during an operation. This issue indicates a discrepancy in tag definitions or configurations between the system and the external device, preventing correct data association. The number of tags that failed in matching is indicated.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect Omron PLC EtherNet/IP I/O Table or Tag Data Link settings in the programming software (e.g., CX-Programmer/Sysmac Studio), verifying data types, sizes, and order of defined tags for the external device.

  2. 2

    Inspect external device's EtherNet/IP communication configuration, confirming its tag names, data types, and sizes precisely match the Omron PLC's defined tags and expected data structure.

  3. 3

    Compare EtherNet/IP Assembly Instance and Connection Point configurations, including their respective input/output sizes and directions, between the Omron PLC and the external device for any discrepancies.

  4. 4

    Verify the correct Electronic Data Sheet (EDS) file for the external EtherNet/IP device is loaded and properly configured within the Omron PLC's EtherNet/IP settings, if applicable, to ensure accurate device profile matching.

Browse all codes in this manual (11)
Verified technical data. Last updated: April 2026

Related Faults

RHxx128Initial Communication Command Error (Encapsulation)RHxx129Device Read Command Error (Encapsulation)RHxx130Device Write Command Error (Encapsulation)
Source: Omron CS/CJ Series EtherNet/IP Driver
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