Omron CS1W-ETN21 Pairing Addresses in Internal Tables, FINS/UDP Communications Methods

IP Addresses in FINS Communications Section 5-2

5-2-2 Pairing Addresses in Internal Tables

FINS/UDP Communications Methods

Automatic Generation (Dynamic)

When the Ethernet Unit is turned ON or restarted, the following values are set for addresses in the internal table.

• 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 dynamic method, data in an internal table that has been generated can be dynamically converted according to FINS messages received from remote nodes. This is enabled when the remote node is a device such as a personal computer and IP addresses are dynamically changed by a method such as DHCP.

Ethernet Unit CPU Unit

Personal computer
Must be fixed.	Change
	registration
Local FINS node number	Automatic generation
	(dynamic setting)
Can be changed.
	Internal table
Local IP address	Remote IP address	Local IP address

IP address FINS command Ethernet

IP address FINS response

Remote FINS node number

Local FINS node number

For the remote IP address, a response is returned to the changed IP address.

Automatic Generation (Static)

With the static method as well, the following values are set for addresses in the internal table when the Ethernet Unit 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.

		Ethernet Unit	CPU Unit
Personal computer			Remote FINS node number
	Must be fixed.		Local FINS node number
Local FINS node number		Automatic generation
		(static setting)
	Must be fixed.
		Internal table
Local IP address		Remote IP address	Local IP address

IP address FINS command Ethernet

IP address FINS response

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