CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 131

• 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

IP Addresses in FINS Communications
Simultaneously Running Multiple Applications on a Personal Computer
FINS/UDP
Communications Method
FINS/TCP
Communications Method
5-2-4
Models Supporting
Automatic Generation
Method (Dynamic)
Related Products and Communications/Setting Methods
server whenever the system is started. Therefore, at a personal computer
using the DHCP service, IP addresses may be different with each system
startup.
DHCP service is mainly used for automatic settings in devices such as per-
sonal computers that are used for client applications. Nodes used for server
applications, such as mail servers, are normally allocated fixed IP addresses.
EtherNet/IP Units and built-in EtherNet/IP ports in PLC systems are also allo-
cated fixed IP addresses.
In communications involving previous models, multiple communications appli-
cations were configured on personal computers according to data accessing
uses, and the fact that no more than one UDP port number for FINS commu-
nications could be used on any given computer created a problem. This Eth-
erNet/IP Unit provides a practical solution with an internal table that pairs
remote nodes (applications) with FINS node addresses, enabling dynamic
changes.
FINS nodes are allocated individually for each application on the computer,
and the respective FINS/UDP port numbers that are used are also allocated
individually. When FINS/UDP FINS commands are sent from individual appli-
cations to the EtherNet/IP Unit or built-in EtherNet/IP port, the respective
remote IP addresses and remote port numbers in the internal table are
dynamically changed.
With this method as well, FINS nodes are allocated individually for each appli-
cation on the computer, and the respective FINS/TCP port numbers that are
used are also allocated individually. Each application is positioned with a
FINS/TCP client, and requests the opening of a connection with the FINS/
TCP server of the EtherNet/IP Unit or built-in EtherNet/IP port.
connection is established, the respective remote IP address and remote port
number in the internal table are dynamically changed.
CS-series Ethernet
Unit
CJ-series Ethernet
Unit
CV/CVM1-series
Ethernet Unit
FinsGateway
Product
100BASE-TX
10BASE-5
10BASE-T
100BASE-TX
10BASE-T
10BASE-5
CS1W-ETN21
CS1W-ETN01
CS1W-ETN11
CJ1W-ETN21
CJ1W-ETN11
CV500-ETN01
Version 4.xx or
lower
Version 2003 or
higher
Model/Series/
Version
Yes
No: Set by automatic
generation method or
combined method. Com-
munications are not pos-
sible with personal
computers with variable
IP addresses.
Yes
No: Set by automatic
generation method or
combined method. Com-
munications are not pos-
sible with personal
computers with variable
IP addresses.
Yes
Supports automatic
generation method
(dynamic)?
Section 5-2
When the
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