Mitsubishi Electric MELSEC iQ-RJ71GF11-T2 - Page 85

1 FUNCTIONS
1.7 Redundant System Function
83
1
■Cyclic transmission send/receive processing
The RJ71GF11-T2 maintains cyclic transmission by the transfer of send data to the new control system when system
switching occurs.
The send range of cyclic transmission of both systems is as follows:
• The own station send ranges of the link devices (RY, RWw) of both systems become the same.
• The master operating station operating as the control system sends and receives cyclic data.
• The submaster operating station operating as the standby system only receives cyclic data.
Each number in the figure, from No.0 to No.2, represents a station number.
If system switching occurs due to an error in the master station (station No.0), the cyclic data is sent from the submaster
station (station No.2), which starts operating as the new control system.
Send range of station No.
Link refresh
Send data from the master station
Send data from the local station
Tracking
RX, RWr
RY, RWw
No.1
No.0
No.2
No.0 No.2
RX, RWr
RY, RWw
No.1
No.0
No.2
No.0
No.1
No.1
No.0
No.2
No.1
No.0
No.2
RX, RWr
RX, RWw
No.2
No.1
No.0
No.2
No.1
Master stationCPU module CPU module
Submaster stationLocal station
Device
Device
Device
Device