Mitsubishi Electric MELSEC Q Series Reference Manual page 434

(4) Program example
In this program example, when M101 turns ON, data in D250 to D254 of station No.4 (target station) are read out
to D700 to D704 of station No.1 (own 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
ZNRD instruction
request source
(Own station)
ZNRD instruction
request target
(Target station)
• When the target station is on a redundant system
ZNRD instruction
request source
(Own station)
CPU module
ZNRD instruction
request target
(Target station)
D250
D251
D252
D253
D254
432
Station No.1
CC-Link IE
CPU module
Controller
Network module
D700
D701
Channel 1
D702
D703
D704
CC-Link IE
CPU module
Controller
Network module
D250
D251
D252
D253
D254
Station No.4
Station No.1
CC-Link IE
CPU module
Controller
Network module
D700
D701
Channel 1
D702
D703
D704
CC-Link IE
Controller
Network module
Station No.4 (Control system)
CPU module
Network No.1
CPU module
CPU module
Network No.1
CPU module
Station No.3 (Standby system)
Station No.2
CC-Link IE
Controller
Network module
CC-Link IE
Controller
Network module
Station No.3
Station No.2
CC-Link IE
Controller
Network module
CC-Link IE
Controller
Network module