Mitsubishi Electric MELSEC Q Series Reference Manual page 160

(2) System configuration and parameter setting for a redundant system
The following is an example of when a self-loopback test is executed on the CC-Link IE Controller Network
module on the system B in the system shown in (a) below.
(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 to OUT and IN of the CC-Link IE Controller
Network module of the system B.
3.
Turn ON the power.
Programming tool
(b) Changing the operation mode of the redundant system
Select "Separate mode" under "Change operation mode" in the "Redundant Operation" window of the
programming tool.
158
System A (control system) System B (standby system)
Control station Normal station
(No.1) (No.2)
Tracking cable