Mitsubishi QJ71LP21 Reference Manual page 90

3 SPECIFICATIONS
Multiplexed remote master station (DM
System switching request
3 - 49
(2) System switching when a system switching dedicated instruction is
executed, a system switching request is issued by GX Developer,
or the link cable is disconnected on other network module
Control system standby system
GX Developer
Remote I/O station (R) Remote I/O station (R) Remote I/O station (R)
(a) CPU system switching time < System switching time from the multiplexed
Control system
Standby system
Output holding time of remote I/O station
[Output holding time (Toh)]
Toh = Ds2 + Scan [ms]
Ds2: Switching time from the multiplexed remote master station to the
multiplexed remote sub-master station [ms]
Scan: Scanning time of the redundant CPU [ms]
)
Multiplexed remote sub-master station (DSM
R
Standby system
remote master station to the multiplexed
remote sub-master station
System switching request from GX Developer
Scan
standby system CPU
control system CPU
MELSEC-Q
control system
Ds2
Toh
)
R
3 - 49