Mitsubishi Electric GT1685 Connection Manual page 138

The following table shows the features of each connection method.
Connection type
• Direct CPU connection
(Remote I/O station of
MELSECNET/H network
system)
• Computer link connection
(Serial communication
module mounted on the
remote I/O station on
MELSECNET/H network
system)
• Ethernet connection
(Ethernet module mounted
on the remote I/O station
of the MELSECNET/H
network system)
• Direct CPU connection
4 - 4
4. HOW TO MONITOR REDUNTANT SYSTEM
Before system switching
Control system
Multiplexed remote
master station
MELSECNET/H remote I/O network
Serial
Remote
communication
I/O station
module
GOT1 GOT2
Direct CPU Computer link
connection connection
GOT
Control
system
Multiplexed remote
master station
MELSECNET/H remote I/O network
Remote I/O
station
GOT1
Control
system
Multiplexed remote
master station
MELSECNET/H remote I/O network
Remote I/O
station
Monitor the PLC CPU of the control system by GOT1.
Standby system
Multiplexed remote
sub master station
Ethernet
module
GOT3
Ethernet
connection
The monitoring target is automatically changed to the control
system PLC CPU.
Standby system
Multiplexed remote
sub-master station
By the Q redundant setting, the GOT automatically changes
the monitoring target to the PLC CPU in the control system.
GOT2
Standby system
Multiplexed remote
sub-master station
Monitor the PLC CPU of the control system by GOT2.
After system switching
Standby system
Multiplexed remote
Multiplexed remote
master station
sub master station
MELSECNET/H remote I/O network
Serial
Remote
communication
I/O station
module
GOT2
GOT1
Direct CPU Computer link
connection connection
GOT
Standby system
Multiplexed remote
master station
MELSECNET/H remote I/O network
Remote I/O
station
GOT1
Standby system
Multiplexed remote
master station
MELSECNET/H remote I/O network
Remote I/O
station
Control system
Ethernet
module
GOT3
Ethernet
connection
Control
system
Multiplexed remote
sub-master station
*1
GOT2
Control
system
Multiplexed remote
sub-master station