Omron CJ1W-EIP21 User Manual

1 Introduction
1-16
CJ-series EtherNet/IP Units Operation Manual for NJ-series CPU Unit (W495)
1-4 Introduction to Communications
Services
A program is not required to perform cyclic data exchanges with other devices on the EtherNet/IP net-
work. Normally, a connection is started with the target device for each tag set that was created with the
Network Configurator to start communications for tag data links for an EtherNet/IP Unit. One connection
is used per tag set. You can register up to 256 connections. The following table gives the EtherNet/IP
Unit tag and tag set specifications.
* In this example, a connection is established with the originator’s tag list with tags a to g (inputs), which are in a
tag set called SP1_IN, and the target’s tag list with tags i and ii (outputs), which are in a tag set called SP1_OUT.
1-4-1 CIP (Common Industrial Protocol) Communications Services
Tag Data Links (Cyclic Communications)
Tags Tag sets
Total size of all tags ≤ 184,832 words Maximum size of 1 tag set ≤ 722 words
(The maximum size is 721 words when the tag set
includes the Controller status.)
Maximum size of 1 tag ≤ 722 words
(The maximum size is 721 words when the tag set
includes the Controller status.)
Number of tags per tag set ≤ 8
(7 tags/tag set when the tag set includes the Controller
status)
Note Input and output variables cannot be combined.
Number of registrable tags ≤ 256 Number of registrable tag sets ≤ 256
EtherNet/IP
Tag ii
Originator device Target device
Tag i
Controller Status
Tag set name: SP1_OUT
Tag Set (Output)
Data flow
Connection
Tag g
Tag c
Tag b
Tag a
Controller status
Tag set name: SP1_IN
Tag Set (Input)
• Packet interval (RPI)
• Originator tag set
• Target tag set
• Target IP address
Connection Information

Omron CJ1W-EIP21 Specifications

General

Brand	Omron
Model	CJ1W-EIP21
Category	Controller
Language	English