Mitsubishi Electric MELSEC iQ-R Series User Manual page 49

After system switching operation
The new control system performs I/O refresh with a module on the base unit.
Send data is passed to the new control system when systems are switched to continue cyclic transmission.
Each number in the figure, from No.0 to No.2, represents a station number.
No.0
Master station
RX, RWr
No.1, 2
No.3
×
RY, RWw
No.1, 2
No.3
: Send range of station No.
: Send data from the master station
: Send data from the slave station
: Send and receive data of external device
 The devices (RX, RY, RWr, RWw) of both stations in the master station are set as identical even after systems are switched.
No.1 No.2
Remote head module Remote head module
(standby system) (control system)
RX, RWr RX, RWr
No.1, 2 No.1, 2
RY, RWw RY, RWw
No.1, 2 No.1, 2
I/O module Remote head module
RX, RWr
RY, RWw
1.8 Redundant Function
1
No.3
No.3
No.3
1 FUNCTIONS
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