Gateway Information; Gateway Ip Address; Subnet Address - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Gateway Information

■Gateway IP Address

When communicating with an external device on another Ethernet network through a gateway other than the default gateway,
set the IP address of the gateway. (Setting range: 0.0.0.1 to 223.255.255.254)
Set a value that satisfies the following conditions.
• The IP address class is any of A, B, and C.
• The subnet address of the gateway is the same as that of the Ethernet-equipped module on the own station.
• The host address bits are not all "0" or all "1".
• When the Ethernet-equipped module communicates with an external device on another Ethernet network
by Passive open, communication is possible without gateway parameter settings.
• In a system where the Proxy router is used, the gateway parameter settings are not required.

■Subnet Address

When communicating with an external device on another Ethernet network through a gateway other than the default gateway,
set the network address
Set a value that satisfies the following conditions.
• The IP address class is any of A, B, and C.
• The host address bits are all "0".
*1 Set the network address of the external device when its class (network address) is different from that of the Ethernet-equipped module
on the own station.
*2 Set the network address of the external device when its class (network address) is the same as that of the Ethernet-equipped module on
the own station.
Ethernet 1
Setting example 1
External device 1
Class B
IP address: 81044001H (129.4.64.1)
Ex.
When the network addresses differ between the Ethernet-equipped module on the own station and the external device
Own station
IP address (Class B)
External device 1
IP address (Class B)
Subnet address setting value
2 PARAMETER SETTINGS
264
2.3 Application Settings
*1 *2
or subnet address
Router 1
Ethernet 2
Setting example 2
External device device 2
Class A
IP address: 71044001H (113.4.64.1)
Network address
81H
1 0 0 0 0 0 0
81H
1 0 0 0 0 0 0
Network address
81H
1 0 0 0 0 0 0
of the external device. (Setting range: 0.0.0.1 to 255.255.255.254)
Own station
Class B
IP address: 81052F01H(129.5.47.1)
Subnet mask: FFFFFC00H (255.255.252.0)
Router 2
05H
1 0 0 0 0 0 1 0 1
04H
1 0 0 0 0 0 1 0 0
04H
1 0 0 0 0 0 1 0 0
Ethernet 4
Router 3
Ethernet 3
Setting example 3
External device 3
Class B
IP address: 81052902H (129.5.41.2)
2FH
0 0 1 0 1 1 1 1 0
40H
0 1 0 0 0 0 0 0 0
Set the network address of the external device 1.
00H
0 0 0 0 0 0 0 0 0
01H
0 0 0 0 0 0 1
01H
0 0 0 0 0 0 1
00H
0 0 0 0 0 0 0