Mitsubishi Electric MELSEC iQ-R04ENCPU - Gateway Information; Gateway IP Address; Subnet Address

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2 PARAMETER SETTINGS
2.3 Application Settings
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
*1
or subnet address
*2
of the external device. (Setting range: 0.0.0.1 to 255.255.255.254)
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.
Ex.
When the network addresses differ between the Ethernet-equipped module on the own station and the external device
Ethernet 4
Ethernet 3Ethernet 1 Ethernet 2
Own station
Class B
IP address: 81052F01H(129.5.47.1)
Subnet mask: FFFFFC00H (255.255.252.0)
External device 1
Class B
IP address: 81044001H (129.4.64.1)
External device 3
Class B
IP address: 81052902H (129.5.41.2)
External device device 2
Class A
IP address: 71044001H (113.4.64.1)
Router 1
Router 3Router 2
Setting example 1 Setting example 2 Setting example 3
10000001
81H
00000101
05H
00101111
2FH
00000001
01H
10000001
81H
00000100
04H
0100
40H
00000001
01H
0000
10000001
81H
00000100
04H
0000
00H
00000000
00H
0000
Own station
IP address (Class B)
Network address
External device 1
IP address (Class B)
Subnet address setting value
Network address
Set the network address of the external device 1.