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About this Manual:
This manual describes the installation and operatio n o f th e CS 1W-ETN21 an d CJ1W-ETN21 E ther net
Units (100Base-TX) and includes the sections describe d below.
Please read this manual carefully and be sure you understand the information provided before
attempting to install or operate the Ethernet Unit. Be su re to read the pr ecautions pr ovided in the fol-
lowing section.
Section 1 introduces the features, describes the system co nfiguration and Unit par ts, and provides
Unit specifications.
Section 2 explains how to install the Ethernet Unit and make the initial s ettings required for operation.
Section 3 provides information for setting communications using CX-Programmer.
Section 4 describes the words allocated in the CIO Area and th e DM Area for Ethernet Units.
Section 5 explains how to manage and use IP addresses.
Section 6 provides information on communicating on Ether net Systems and inte rconne cted n etwor ks
using FINS commands.
Section 7 describes the FINS commands that can be sent to an Ether net Unit and the responses that
are returned by the Ethernet Unit.
Section 8 describes information and procedures that can b e used to troubleshoot problems that some-
times occur with Ethernet Unit and Ethernet com munications.
Appendices provide information on Ethernet network parameters, the buffer configuration, TCP status
transitions, ASCII characters, maintenance, and inspections.
The related Ethernet Units Operation Manual Construction of Applications (W 421 ) provide s the follow-
ing information.
Section Contents
Section 1 Overview of functions for constructing applications.
Section 2 Information on using mail functions to automatically send I/O memory data from
OMRON PLCs to personal computers.
Section 3 Information on using mail functions to send commands from OMRON PLCs to per-
sonal computers.
Section 4 Information on transferring large files between personal computers and OMRON
PLCs.
Section 5 Information on automatically adjusting the OMRON PLC’s built-in clock.
Section 6 Information on communicating between general applications (applications not using
FINS) and OMRON PLCs.
Section 7 Information on using personal computer and UNIX machine socket interfaces to cre-
ate applications using FINS communications.