Item

Specification

Number of nodes

254

Message length

1016 bytes max (CJ1W-ENT21 is 2024bytes)

Number of buffers

8k (CJ1W-ETN21 is 392kbytes)

Protocol name

FINS/UDP method

FINS/TCP method

Protocol used

UDP/IP

TCP/IP

The selection of UDP/IP or TCP/IP is made by means of the

FINS/TCP Tab in the CX-Programmer’s Unit Setup.

Number of connections

2 (CJ1W-ETN21 is 16)

Port number

9600 (default) Can be changed.

9600 (default) Can be changed.

Protection

No

Yes (Specification of client IP addresses when unit is Protection No used as a server)

Other

Items set for each UDP port

Broadcast

Address conversion method

Items set for each connection

Server specification

Remote IP address spec.

Server: specify IP addresses of clients permitted to connect.

Client: specify remote Ethernet Unit (server) IP address

Automatic FINS node address allocation

Specify automatic allocation of client FINS node addresses

Internal table

This is a table of correspondences for remote FINS node addresses, remote IP addresses, TCP/UDP, and

remote port numbers. It is created automatically when power is turned ON to the PLC or when the unit is

restarted, and it is automatically changed when a connection is established by means of the FINS/TCP method

or when a FINS command received.

The following functions are enabled by using this table.

IP address conversion using the FINS/UDP method

Automatic FINS node address conversion after a connection is established using the FINS/TCP method

Automatic client FINS node address allocation using the FINS/TCP method

Simultaneous connection of multiple FINS applications