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C404H

Protocol Cancel Request Error

Mitsubishi Electric · MELSEC iQ-R Module Dedicated Instructions

Hva betyr C404H ?

This error occurs when a cancellation request is received for the m-th protocol while multiple protocols are being executed continuously by the GP.ECPRTCL instruction. The Ethernet module records the protocol number m currently being executed and the receive packet number of successfully collated protocols (1 to m-1) that were already executed.

Vanlige årsaker

  • A cancel request is received during execution of the mth protocol while multiple protocols are executed continuously.

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    Check if an external cancellation request was sent during GP.ECPRTCL instruction execution to verify intentional cancellation.

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Verifisert teknisk data. Sist oppdatert: March 2026

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Kilde: Mitsubishi Electric MELSEC iQ-R Module Dedicated Instructions