Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 352

7 APPLICATION FUNCTIONS
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(c) The target network No. in the routing parameters must be rewritten with the
RTWRITE instruction because the same number cannot be set twice.
1) When the regular network is normal
2) When the regular network is faulty
CPU 1M 1
2M 1
P P
(standby)
2)
1)
Network No. 1
Network No. 2
Target
network No.
3
1)
2) 3
(d) The network No. (Jn) of the dedicated link instruction must be changed as
follows.
1) When the regular network is normal
2) When the regular network is faulty
CPU 1N 2 2N 2
3M
S
S P
(standby)
Relay
network No.
1
2
CPU 3N 2
1
S
Network No. 3
Relay
station No.
2
2
MELSEC-Q
7 - 128