Mitsubishi Electric MELSEC Q Series Reference Manual page 117

3 SPECIFICATIONS
3 - 61
(b) CPU system switching time > 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 = Tsw + (SS 2) [ms]
Tsw: Redundant CPU system switching time [ms]
SS: Scanning time of the redundant CPU [ms]
POINT
For the CPU system switching time, refer to QnPRHCPU User's Manual
(Redundant System).
A power down has occurred on the control system
SS
standby system CPU
control system CPU
MELSEC-Q
Tsw
Toh
3 - 61