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
Verify that no protocol setting data is being written while the GP.ECPRTCL instruction is active.
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC iQ-R Module Dedicated Instructions