Mitsubishi Electric MELSEC iQ-RJ71C24-R4 - Page 550

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APPENDICES APPENDIX
Appendix 7 When Connecting the Module to a Remote Head Module
■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
refresh.
• 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
: Link scan
: Refresh (Remote head moduleC24)
: Link refresh
: Link scan
: Refresh (Remote head moduleC24)
R04CPU
Y
1000H
X
1000H
W
0000H
1000H
RJ71GF11-T2
RY
RX
RWw
RWr
RJ72GF15-T2
RY
0000H
0000H
0000H
0000H
Y
0000H
X
0000H
W
0000H
1000H
RJ71C24
RX
RWw
RWr
Ó
Ô
Ò
Un\G
R04CPU
Y
1000H
X
1000H
W
0000H
1000H
RJ71GF11-T2
RY
RX
RWw
RWr
RJ72GF15-T2
RY
0000H
0000H
0000H
0000H
Y
0000H
X
0000H
W
0000H
1000H
RJ71C24
RX
RWw
RWr
Ò
Ô
Ó
Un\G