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MELSEC-Q
5 FUNCTIONS
5.5 Router Relay Function
(1) Router relay function
The router relay function enables data communications with slave devices
connected to other Ethernets via routers and gateways.
(2) To use router relay function
To use the router relay function, set the router relay function of the basic
parameter to "Used". (Default: Not used)
The following basic parameters are available for the router relay function.
Subnet mask pattern
Default router IP address
Number of routers set
Router information
Change the default values set to the basic parameters as necessary.
Refer to Section 7.2 for details of the routing information.
Ethernet
QJ71MT91
[Master function]
[Router 1]
[Router 2]
[Default router]
Ethernet
Ethernet
Ethernet
MODBUS /TCP
slave device 1
R
MODBUS /TCP
slave device 2
R
MODBUS /TCP
slave device 3
R
MODBUS /TCP
slave device 4
R
POINT
(1) When the slave function of the QJ71MT91 is used to communicate with the
master device on another Ethernet, communication can be made without use of
the router relay function.
(2) A system using a Proxy router need not use the router relay function.
(3) The router relay function is not the function that operates the QJ71MT91 as a
router.
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