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MELSEC-Q
7 PARAMETER SETTING
(Setting example 3) When the network addresses of the local station QJ71MT91 and target device are the
same
Local station QJ71MT91
IP address (Class B)
Target device 3)
Subnet mask
IP address (Class B)
Subnet address set
value
Network address
Subnet address
Set the subnet address of the target device 3).
10000001
81H
00000101
05H
00101111
2FH
00000001
01H
10000001
81H
00000101
05H
0010
29H
00000010
02H
1001
10000001
81H
0000
00H
0000
11
FFH
111111 11
FFH
111111 10
FCH
111110 0000
00H
0000
00000101
05H
0010
28H
1000
(f) Router information: Router IP address
Set the IP addresses of the routers to be used when the QJ71MT91
communicates with the target devices on other Ethernets via other than the
default router.
Set the value that satisfies the following conditions.
Condition 1: The IP address class is any of A, B and C.
Condition 2: The subnet address of the router is the same as that of the
local station QJ71MT91.
Condition 3: The host address bits are not all "0" or all "1".
POINT
(1) The router relay function is not needed for communication when the slave
function of the QJ71MT91 is used to make communication with the master
device on another Ethernet.
(2) The router relay function is not needed in a system that uses the Proxy router.