Mitsubishi Electric MELSEC iQ-R Series User Manual page 550

Serial communication module

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■Data communication using the nonprocedural or bidirectional protocol

• Receiving procedure

 Checks the data reception from an external device by 'CH1 reception data read request' (X3).

 The data received from the external device is transferred from the buffer memory of C24 to the device of the remote head

module by refresh (remote head module  C24).

 Reads the data received from the external device which is transferred to the link register (W) of the CPU module by link

: Link refresh

: Refresh (Remote head moduleC24)

• Sending procedure

 Writes the send data to the link register (W) of the CPU module to write the send data to the buffer memory of C24.

 Issues the transmission request by 'CH1 transmission request' (Y0).

 'CH1 transmission normal completion' (X0) turns ON when the execution of the transmission request completes.

: Link refresh

: Refresh (Remote head moduleC24)

APPENDICES APPENDIX

Appendix 7 When Connecting the Module to a Remote Head Module

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