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7 PROGRAMMING FOR EXECUTING THE MASTER FUNCTION
Programmable controller CPU
X100 to X107
X110 to X14F
X160 to X16F
Y100 to Y107
Y110 to Y14F
7 - 6
(3) Communications
The following shows the relation among the programmable controller CPU,
master node's buffer memory, and a slave node.
QJ71DN91 master node
Receive data
FROM
Node No. 1
700
H
701
H
FROM
702
H
Node No. 4
703
H
704
H
Node No. 3 status
705
H
FROM
Node No. 3
706
H
Transmit data
TO
Node No. 2
900
H
901
H
902
TO
H
Node No. 4
903
H
904
H
Node No. 3
905
H
MELSEC-Q
Remote I/O (node No. 1)
8-point input
I00 to I07
Input 00 to input 07
QJ71DN91 slave node (node No. 4)
8-byte transfer
C00
H
C01
H
Transmit data
C02
H
C03
H
B00
H
B01
Receive data
H
B02
H
B03
H
Remote I/O (node No. 3)
16-point input
Status
I00 to I15
Input 00 to input 15
Dummy output
Remote I/O (node No. 2)
8-point input
O00 to O07
Output 00 to output 07
7 - 6
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Troubleshooting
