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ErrorLib — Industrial Fault Code Library

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C430H

Protocol Setting Data Write Error

Mitsubishi Electric · MELSEC iQ-R Module Dedicated Instructions

What does C430H mean?

This error occurs if protocol setting data is written during the execution of the GP.ECPRTCL instruction. Upon completion of the write operation, the protocol currently in execution is canceled, and this error code is generated.

Common Causes

  • Protocol setting data is written during the execution period of the GP.ECPRTCL instruction.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify that no protocol setting data is being written while the GP.ECPRTCL instruction is active.

Browse all codes in this manual (8)
Verified technical data. Last updated: April 2026

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Source: Mitsubishi Electric MELSEC iQ-R Module Dedicated Instructions
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