Mitsubishi Electric MELSEC Q Series Reference Manual page 118

3 SPECIFICATIONS
Multiplexed remote master station (DM
System switching request
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(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
remote master station to the multiplexed remote sub-master station
Control system
Standby system
Output holding time of remote I/O station
[Output holding time (Toh)]
Toh = Ds2 + SS [ms]
Ds2: Switching time from the multiplexed remote master station to the
multiplexed remote sub-master station [ms]
SS: Scanning time of the redundant CPU [ms]
)
Multiplexed remote sub-master station (DSM
R
Standby system
System switching request from GX Developer
SS
standby system CPU
control system CPU
MELSEC-Q
control system
Ds2
Toh
)
R
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