Ethernet connection (Connection to Ethernet module mounted on remote I/O
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.
Network No. 1, Station No. 2
(remote I/O station)
(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.
(2) GT Designer3 setting
Set GT Designer3 as follows.
Device setting (Network setting)
Q Redundant Setting
Routing Information Setting
GT14 is not compatible with MELSEC-QS.
In this case, the GOT monitoring is performed by transient transmission of the MELSECNET/H network system.
Therefore, a longer time-lag occurs for displaying objects compared with directly monitoring the PLC CPU.
For displaying objects with a shorter time-lag, set the device for link devices B and W of the host station set in
the MELSECNET/H network and execute the cyclic transmission.
For details, refer to the following manual.
(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.
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4. HOW TO MONITOR REDUNTANT SYSTEM
4.1 Connection to Remote I/O Station in MELSECNET/H Network System
Network No. 1, Station No. 0
(Multiplexed remote master station)
MELSECNET/H remote I/O network
8. ETHERNET CONNECTION
GT16, GT15, GT12: MELSEC-QnA/Q/QS, MELDAS C6*
GT14: MELSEC-QnA/Q, MELDAS C6*
Do not set the item.
8. ETHERNET CONNECTION
Q Corresponding MELSECNET/H Network System Reference Manual (Remote I/Q network)
Network No. 1, Station No. 1
(Multiplexed remote sub master station)
Network No. 2, Station No. 2
Network No. 2, Station No. 3
NW No.: Network No. of MELSECNET/H remote I/O network
Station No.: 0 (Master station)