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4. HOW TO MONITOR REDUNTANT SYSTEM
4.10 Switch the Monitor Target to the Control System Using the Script Function
When the MELSECNET/H network is connected to the redundant system only, SW56 (current control station) can
be set as the station number switching device.
In this case, even if the system switching occurs, the GOT always monitors the station number that is currently the
control station.
Setting method (Ethernet connection)
System configuration example 2: Ethernet connection
1. Set the station number switching device.
Select [Common] [Controller Setting] [Station No. Switching], and set the internal device GD100 as the
station number switching device.
Do not use a device of PLC CPU as a screen switching device. Since the device information is transferred by the
tracking transfer function of the redundant system, the trigger action may be disabled.
Connected module Network No. Station No.
Ethernet module of control system
1
1
Ethernet module of standby system 2
GOT connected to the Ethernet network 3
Ethernet
Network No. 1
GOT
Station No. 3
Control system
(System A)
Q25PRH
CPU
QJ71
E71
Standby system
(System B)
Station No. 1
Q25PRH
CPU
QJ71
E71
Station No. 2
Set here.
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