Mitsubishi Electric MELSEC Q Series Reference Manual page 442

(4) Program example
In this program example, when M112 turns ON, data in D750 to D753 of station No.2 (own station) are written to
D300 to D303 of station No.3 (target station).
If the target station is on a redundant system, the station numbers used for the redundant system in this case are
assumed to be No.3 and No.4.
(a) System configuration example
• When the target station is not on a redundant system
CPU module
CPU module
• When the target station is on a redundant system
CPU module
CPU module
440
Station No.1
CC-Link IE
Controller
Network module
CC-Link IE
Controller
Network module
Station No.4
Station No.1
CC-Link IE
Controller
Network module
CC-Link IE
ZNWR instruction
Controller
request target
Network module
(Target station)
Station No.4 (Standby system)
CPU module
ZNWR instruction
request source
(Own station)
D750
D751
D752
D753
Network No.1
CPU module
ZNWR instruction
request target
(Target station)
D300
D301
D302
D303
CPU module
ZNWR instruction
request source
(Own station)
D750
D751
D752
D753
Network No.1
CPU module
D300
D301
D302
D303
Station No.2
CC-Link IE
Controller
Network module
Channel 2
CC-Link IE
Controller
Network module
Station No.3
Station No.2
CC-Link IE
Controller
Network module
Channel 2
CC-Link IE
Controller
Network module
Station No.3 (Control system)