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4. HOW TO MONITOR REDUNTANT SYSTEM
4.1 Connection to Remote I/O Station in MELSECNET/H Network System
4.1.3 Ethernet connection (Connection to Ethernet module mounted on remote I/O
station)
This section explains the Ethernet connection for connecting the GOT to the Ethernet module mounted on the remote I/
O station of the MELSECNET/H network system.
The following shows an example of connecting the GOT to the Ethernet module mounted on the I/O station of the
MELESCNET/H network system.
(1) Connection method
Connect the GOT to the Ethernet module (QJ71E71-100, QJ71E71-B5, QJ71E71-B2, QJ71E71) mounted on
the remote I/O station of the MELSECNET/H network system.
For details, refer to the following.
8. ETHERNET CONNECTION
(2) GT Designer3 setting
Set GT Designer3 as follows.
(3) Monitoring target change when system switching occurs in a redundant system
When the system switching occurs, the multiplexed remote sub master station switched to the control system
takes over the master operation of MELSECNET/H.
Since the GOT monitors the master station, the monitoring target is automatically changed to the PLC CPU that
is operating as the master.
Setting item Settings Model
Controller Type
MELSEC-QnA/Q/QS, MELDAS C6*
MELSEC-QnA/Q, MELDAS C6*
Device setting
(Network setting)
Other station
Other (NW No. 1 (network No. of remote I/O network),
Station No. 0 (master station))
Q Redundant Setting Do not set the item.
Routing Information Setting
8. ETHERNET CONNECTION
Monitor target
Control system
(System A)
Network No. 1, Station No. 0
(Multiplexed remote master station)
Network No. 1, Station No. 2
(remote I/O station)
Network No. 2, Station No. 3
Network No. 2, Station No. 2
Ethernet
GOT
MELSECNET/H remote I/O network
Network No. 1, Station No. 1
(Multiplexed remote sub master station)
Standby system
(System B)
Power supply
module
Q25PRHCPU
Q25PRHCPU
QJ71LP21-25
QJ72LP25-25
QJ71E71-100
QJ71LP21-25
QJ71BR11
QJ71BR11
QJ71E71-100
QJ61BT11N
Power supply
module
Power supply
module
Empty
Empty
Empty
Empty
QJ71E71-100
QJ61BT11N