Mitsubishi Electric MELSEC Q Series Reference Manual page 172

(2) System configuration and parameter setting for a redundant system
The following is an example of setting the CC-Link IE Controller Network module on the system B as an executing
station in the system shown in (a) below.
Set the operation mode of the redundant system to separate mode for the station-to-station test.
(a) System configuration
1.
Connect the programming tool to the control system CPU module.
2.
Turn OFF the power and connect an optical fiber cable between OUT of the executing station and
IN of the other station.
3.
Turn ON the power.
Programming tool
(b) Changing the operation mode of the redundant system
Select "Separate mode" in "Change operation mode" in the "Redundant Operation" window of the
programming tool.
170
Station-to-station test
(executing station)
System B (standby system)
System A (control system)
Normal station
Control station
(No.2)
(No.1)
Tracking cable
Station-to-station test
(target station)
Normal station
(No.3)