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IP Addresses in FINS Communications Section 5-2
Automatic Generation
(Static)
With the static method as well, the following values are set for addresses in
the internal table when the EtherNet/IP Unit or built-in EtherNet/IP port is
turned ON or restarted.
• Remote IP address: Local IP address network number + remote
FINS node address
• Remote UDP port number: UDP port number set for local Unit
• Connection method: FINS/UDP
With the static method, however, data in an internal table that has been gener-
ated is not freely changed.
IP Address Table Method With this method, FINS node addresses are converted to IP addresses based
on a preset correspondence table (IP address table).
The IP address table is set on the FINS/UDP Tab Page of the Edit Parameters
Dialog Box of the CX-Programmer. Nodes can be registered even if they are
in different segments and have different network IDs
The internal table will be as follows:
• FINS Node Address Registered to IP Address Table
The following address is registered to the internal table.
• Remote IP address: IP address registered to IP address table
• Remote UDP port number: UDP port number set for local Unit
• Connection method: FINS/UDP
• FINS Node Address Not Registered to IP Address Table
The following address is registered to the internal table.
• Remote IP address: 0.0.0.0
• Remote UDP port number: UDP port number set for local Unit
• Connection method: FINS/UDP
With the IP address table method, records of FINS nodes registered to the IP
address table are not changed dynamically. When the Unit is turned ON or
restarted, the IP addresses of remote FINS nodes registered with an IP
address of 0.0.0.0 can be changed dynamically according to FINS messages
received from remote nodes. This can be used effectively when the remote
node is a device such as a personal computer and IP addresses are dynami-
cally changed by a method such as DHCP.
Personal computer
Local FINS node number
Local IP address
Must be fixed.
Must be fixed.
IP address
IP address
FINS command
FINS response
EtherNet/IP Unit
Automatic generation
(static setting)
Internal table
Remote IP address Local IP address
CPU Unit
Remote FINS node number
Local FINS node number
Ethernet (EtherNet/IP)