CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 227

• Manufacturer Part Number: CJ1W-EIP21
• Description: Ethernet I/P Module
• Manufacturer: Omron

Specifications of CJ1W-EIP21

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

8-1-2
8-1-3
Overview of FINS Communications
Number of nodes
Message length
Number of buffers
Protocol name
Protocol used
Number of connections ---
Port number
Protection
Other
Internal table
Item
Using the FINS/UDP and FINS/TCP Methods
FINS Communications Service Specifications
254
2,012 bytes max.
192
FINS/UDP method
UDP/IP
9600 (default)
Can be changed.
No
Items set for each UDP
port
• Broadcast
• IP Address Conversion
This 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 Ethernet 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/
• Automatic client FINS node address allocation using the FINS/TCP method
• Simultaneous connection of multiple FINS applications
TCP method
It is recommended that FINS/UDP and FINS/TCP be used as follows:
• When remote devices do not support the FINS/TCP method:
• When FINS nodes are connected on the same Ethernet segment:
• When FINS nodes are connected over multiple IP network layers:
• When the quality of connections is unreliable, as with wireless LAN:
Use the FINS/UDP method for FINS communications with those devices.
Use the FINS/UDP method between those nodes.
Note FINS/UDP offers a slight advantage in performance.
Use the FINS/TCP method between those nodes.
Note FINS/TCP offers superior communications quality.
Use the FINS/TCP method between those nodes.
Note FINS/TCP offers superior communications quality.
FINS/TCP method
TCP/IP
16
9600 (default)
Can be changed.
Yes (Specification of client IP addresses when Unit is used as a
server)
Items set for each connection
• Server/client specification
• Remote IP address specification
• Automatic FINS node address allocation:
• Keep-alive:
TCP/IP Setting
• Remote node keep-alive time
Specify automatic allocation of client FINS node addresses.
Specify whether remote node keep-alive is to be used.
When client: Specify the IP address of the remote Unit (server).
When server: Specify IP addresses of clients permitted to con-
nect.
Specifications
Section 8-1
199