Omron CS CJ1W-ETN21 User Manual

OPERATION MANUAL

Ethernet Units
Construction of Applications

SYSMAC CS and CJ Series

CS1W-ETN21 (100Base-TX)
CJ1W-ETN21 (100Base-TX)

Cat. No. W421-E1-03

CS1W-ETN21 (100Base-TX) CJ1W-ETN21 (100Base-TX) Ethernet Units Construction of Applications

Operation Manual

Revised November 2005

Notice:

r
f

OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.

The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or dam­age to property.

!DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury. Additionally, there may be severe property damage.

!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury. Additionally, there may be severe property damage.

!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury, or property damage.

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.

The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.

The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program­ming Device displays to mean Programmable Controller.

Visual Aids

The following headings appear in the left column of the manual to help you locate different types of
information.

 OMRON, 2003

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o
OMRON.

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con­stantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.

Note Indicates information of particular interest for efficient and convenient opera-

tion of the product.

1,2,3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.

v

vi

TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi

1 Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

2 General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiv

5 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxiv

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvi

SECTION 1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1-1 Ethernet Unit Communications Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 Functions Listed by Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

1-3 Table of Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1-4 Common Protocol Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

SECTION 2

Mail Send Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2-1 Mail Send Function Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2-2 Mail Send Function Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2-3 Mail Send Function Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2-4 Using the Mail Send Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2-5 Mail Send Function Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

2-6 I/O Memory Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2-7 Attached File Transfer Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2-8 Mail Send Function Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

2-9 Example Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

SECTION 3

Receive Mail Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3-1 Mail Receive Function Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3-2 Mail Receive Function Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3-3 Using the Mail Receive Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3-4 Remote Mail Command Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

3-5 Mail Receive Function Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

3-6 I/O Memory Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

3-7 Attached File Transfer Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

3-8 Mail Receive Function Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

3-9 Example Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

vii

TABLE OF CONTENTS

SECTION 4

FTP Server. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

4-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

4-2 FTP Server Function Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

4-3 Using the FTP Server Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

4-4 FTP Server Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

4-5 Using FTP Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

4-6 Checking FTP Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

4-7 Using File Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

4-8 FTP File Transfer Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

4-9 UNIX Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

SECTION 5

Automatic Clock Adjustment Function . . . . . . . . . . . . . . . . 89

5-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

5-2 Using the Automatic Clock Adjustment Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

5-3 Automatic Clock Adjustment Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

5-4 Automatic Clock Adjustment Error Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

SECTION 6

Socket Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

6-1 Overview of Socket Communications from Ethernet Units . . . . . . . . . . . . . . . . . . . . . . . . . 99

6-2 Protocol Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

6-3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

6-4 Socket Service Function Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

6-5 Using Socket Service Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

6-6 Socket Service Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

6-7 Using Socket Services by Manipulating Dedicated Control Bits . . . . . . . . . . . . . . . . . . . . . 112

6-8 Using Socket Services with CMND(490) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

6-9 Precautions in Using Socket Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

SECTION 7
Using FINS Communications to Create Host Applications 159

7-1 Overview of FINS Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

7-2 FINS Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

7-3 FINS/UDP Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

7-4 FINS/TCP Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

7-5 Maximum Transmission Delays: Writing/Reading to CPU Unit . . . . . . . . . . . . . . . . . . . . . 192

viii

TABLE OF CONTENTS

Appendices

A Ethernet Network Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

B Buffer Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

C TCP Status Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199

D ASCII Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

E Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

F Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

ix

TABLE OF CONTENTS

x

About this Manual:

This manual describes the operation of the CS1W-ETN21 and CJ1W-ETN21 Ethernet Units (100Base­TX) for constructing applications and includes the sections described below.

Please read this manual carefully and be sure you understand the information provided before
attempting to install or operate the Ethernet Unit. Be sure to read the precautions provided in the fol­lowing section.

Precautions

Section 1 introduces the Ethernet Unit’s communications services, including information on functions

and protocols.

Section 2 describes how to use the Ethernet Unit’s Mail Send Function, including specifications, sta­tus details, application examples, and troubleshooting information.

Section 3 describes how to use the Ethernet Unit’s Mail Receive Function, including specifications,
status details, I/O memory data formats, file transfer timing, application examples, and troubleshooting
information.

Section 4 describes the functions provided by the FTP server.

Section 5 provides an overview of the automatic clock adjustment function, including details on speci-

fications, required settings, operations from CX-Programmer, and troubleshooting.

Section 6 describes the functionality provided by the Ethernet Unit via the socket services.

Section 7 provides information on communicating on Ethernet Systems and interconnected networks

using FINS commands. The information provided in the section deals only with FINS communications
in reference to Ethernet Units.

Appendices provide information on Ethernet network parameters, the buffer configuration, TCP status
transitions, ASCII characters, maintenance, and inspections.

The related Operation Manual Construction of Networks (W420) provides the following information.

Section Contents

Section 1 Overview of Ethernet Unit features, specifications, and description of the Unit parts and system configura-

tion for constructing Networks.
Section 2 Information on Ethernet Unit’s installation and initial settings required for operation.
Section 3

Section 4 Information on words allocated in the CIO Area and DM Area for Ethernet Units.
Section 5

Section 6

Information

Information on

Information on

commands.

Section 7

Information on

are returned by the Ethernet Unit.

Section 8 Information on troubleshooting.

on setting communications using CX-Programmer.

how to manage and use IP addresses.
communicating on Ethernet Systems and interconnected networks using FINS

the FINS commands that can be sent to an Ethernet Unit and the responses that

xi

Relevant Manuals

The following table lists CS- and CJ-series manuals that contain information relevant to Ethernet Units.

Manual

number

W420 CS1W-ETN21

CJ1W-ETN21

W421 CS1W-ETN21

CJ1W-ETN21

W343 CS1W-ETN01

CS1W-ETN11
CJ1W-ETN11

W342 CS1G/H-CPU@@H

CS1G/H-CPU-@@V1
CS1W-SCU21
CS1W-SCB21/41
CJ1G/H-CPU@@H
CJ1G-CPU@@
CJ1W-SCU41

W339 CS1G/H-CPU@@H

CS1G/H-CPU-@@V1

W393 CJ1G/H-CPU@@H

CJ1G-CPU@@

Model Name Contents

Ethernet Units Oper­ation Manual
Construction of Net­works

Ethernet Units Oper­ation Manual
Construction of
Applications
(this manual)

Ethernet Units Oper­ation Manual

Communications
Commands Refer­ence Manual

Programmable Con­trollers Operation
Manual

Programmable Con­trollers Operation
Manual

Provides information on operating and installing
100Base-TX Ethernet Units, including details on basic
settings and FINS communications.

Refer to the Communications Commands Reference
Manual (W342) for details on FINS commands that can
be sent to CS-series and CJ-series CPU Units when
using the FINS communications service.

Provides information on constructing host applications for
100Base-TX Ethernet Units, including functions for send­ing/receiving mail, socket service, automatic clock adjust­ment, FTP server functions, and FINS communications.

Describes the installation and operation of the 10Base-5
and 10Base-T Ethernet Units.

Describes the C-series (Host Link) and FINS communi­cations commands used when sending communications
commands to CS-series and CJ-series CPU Units.

Provides an outline of, and describes the design, installa­tion, maintenance, and other basic operations for the CS­series PLCs. Information is also included on features,
system configuration, wiring, I/O memory allocations, and
troubleshooting.

Use together with the Programmable Controllers Pro-
gramming Manual (W394).

Provides an outline of, and describes the design, installa­tion, maintenance, and other basic operations for the CJ­series PLCs. Information is also included on features,
system configuration, wiring, I/O memory allocations, and
troubleshooting.

Use together with the Programmable Controllers Pro-
gramming Manual (W394).

xii

Manual

number

W394 CS1G/H-CPU@@H

CS1G/H-CPU-@@V1
CJ1G/H-CPU@@H
CJ1G-CPU@@

W340 CS1G/H-CPU@@H

CS1G/H-CPU-@@V1
CJ1G/H-CPU@@H
CJ1G-CPU@@

W414 WS02-CX-@@JV3 CX-Programmer

W341 CQM1H-PRO01

CQM1-PRO01
C200H-PRO27 +
CS1W-KS001

W336 CS1W-SCB21/41

CS1W-SCU21
CJ1W-SCU41

Model Name Contents

Programmable Con­trollers Program­ming Manual

Programmable Con­trollers Instructions
Reference Manual

@ Operation

Ver.3 .
Manual

Programming Con­soles Operation
Manual

Serial Communica­tions Boards and
Serial Communica­tions Units Operation
Manual

Describes programming, tasks, file memory, and other
functions for the CS-series and CJ-series PLCs.

Use together with the Programmable Controllers Opera-
tion Manual (W339 for CS-series PLCs and W393 for CJ­series PLCs).

Describes the ladder diagram programming instructions
supported by CS-series and CJ-series PCs. Use together
with the Programmable Controllers Operation Manual
(W339 for CS-series PLCs and W393 for CJ-series
PLCs), and Programmable Controllers Programming
Manual (W394).

Provides information on how to use the CX-Programmer,
a Windows-based programming device, and CX-Net, a
Windows-based network configuration tool.

Use together with the Programmable Controllers Opera-
tion Manual (W339 for CS-series PLCs and W393 for CJ­series PLCs), Programmable Controllers Programming

Manual (W394) and the Programmable Controllers
Instructions Reference Manual (W340) to perform pro-

gramming.
Provides information on how to operate the Programming

Console.
Use together with the Programmable Controllers Opera-

tion Manual (W339 for CS-series PLCs and W393 for CJ­series PLCs), Programmable Controllers Programming

Manual (W394) and the Programmable Controllers
Instructions Reference Manual (W340) to perform pro-

gramming.
Accessing the PLC connected to the CX-Programmer via

Ethernet or the host computer or other device connected
to the Serial Communications Board or Unit.

Describes the use of Serial Communications Units and
Boards, including details on hardware, software, and
standard system protocols.

!WARNING Failure to read and understand the information provided in this manual may result in per-

sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

xiii

xiv

Read and Understand this Manual

Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON­INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.

LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.

In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

xv

Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.

At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:

• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.

• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.

• Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.

xvi

Disclaimers

CHANGE IN SPECIFICATIONS

Product specifications and accessories may be changed at any time based on improvements and other
reasons.

It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.

PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.

ERRORS AND OMISSIONS

The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

xvii

xviii

Unit Versions of CS/CJ-series

Unit Versions A “unit version” has been introduced to manage Units in the CS/CJ Series

according to differences in functionality accompanying Unit upgrades.

Notation of Unit Versions
on Products

Confirming Unit Versions
with Support Software

The unit version is given to the right of the lot number on the nameplate of the
products for which unit versions are being managed, as shown below.

Product nameplate

CS1W-

UNIT

Lot No.

Lot No. 040401 0000 Ver.1.3

OMRON Corporation MADE IN JAPAN

Unit version
Example for unit version 1.3

CX-Programmer version 4.0 can be used to confirm the unit version using the
Unit Manufacturing Information.

Note The unit versions of Pre-Ver.2.0 Units cannot be confirmed in Unit Manufac-

turing Information. The following dialog box is displayed.

In the IO Table Window, right-click and select Unit Manufacturing informa-
tion - CPU Unit.

The following Unit Manufacturing information Dialog Box will be displayed.

Unit version

Use the above display to confirm the unit version of the Unit connected online.

xix

Using Unit Version Label The following unit version label is provided with the Ethernet Unit.

This label can be attached to the front of the Ethernet Unit to differentiate
between Ethernet Units with different unit versions.

Unit Version Notation In this manual, the unit version of a Ethernet Unit is given as shown in the fol-

lowing table.

Product nameplate Notation used in this manual Special remarks

Ver. 2.0 or later number
shown to right of the lot
number

Blank to the right of lot
number

Ethernet Unit Ver. 1.3 or later Information without reference to specific Unit

Versions applies to all versions of the Unit.

Pre-Ver. 1.3 Ethernet Units

Unit Versions and Lot Numbers

Type Model Date of manufacture

March 2003 or earlier April 2004 or later

Special I/O Unit Ethernet Unit CS1W-ETN21

CJ1W-ETN21

Supported Software CX-Programmer WS02-CXPC1-JV@ Ver. 3.3 or earlier Ver. 4. 0

No version code Unit Ver. 1.3

(Lot No.: 040401)

xx

PRECAUTIONS

This section provides general precautions for using the CS1W-ETN21 and CJ1W-ETN21 Ethernet Units (100Base-TX).

The information contained in this section is important for the safe and reliable application of Ethernet Units. You
must read this section and understand the information contained before attempting to set up or operate an Ethernet
Unit.

1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiv

5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxiv

6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvi

6-1 Applicable Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvi

6-2 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvi

xxi

Intended Audience 1

1 Intended Audience

This manual is intended for the following personnel, who must also have
knowledge of electrical systems (an electrical engineer or the equivalent).

• Personnel in charge of installing FA systems.

• Personnel in charge of designing FA systems.

• Personnel in charge of managing FA systems and facilities.

2 General Precautions

The user must operate the product according to the performance specifica­tions described in the operation manuals.

Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amuse­ment machines, safety equipment, and other systems, machines, and equip­ment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.

Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.

This manual provides information for programming and operating the Unit. Be
sure to read this manual before attempting to use the Unit and keep this man­ual close at hand for reference during operation.

!WARNING It is extremely important that a PLC and all PLC Units be used for the speci-

fied purpose and under the specified conditions, especially in applications that
can directly or indirectly affect human life. You must consult with your
OMRON representative before applying a PLC System to the above-men­tioned applications.

3 Safety Precautions

!WARNING Do not attempt to take any Unit apart while the power is being supplied. Doing

so may result in electric shock.

!WARNING Do not touch any of the terminals or terminal blocks while the power is being

supplied. Doing so may result in electric shock.

!WARNING Do not attempt to disassemble, repair, or modify any Units. Any attempt to do

so may result in malfunction, fire, or electric shock.

xxii

Safety Precautions 3

!WARNING Provide safety measures in external circuits (i.e., not in the Programmable

Controller), including the following items, to ensure safety in the system if an
abnormality occurs due to malfunction of the PLC or another external factor
affecting the PLC operation. Not doing so may result in serious accidents.

• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.

• The PLC will turn OFF all outputs when its self-diagnosis function detects
any error or when a severe failure alarm (FALS) instruction is executed.
As a countermeasure for such errors, external safety measures must be
provided to ensure safety in the system.

• The PLC outputs may remain ON or OFF due to deposits on or burning of
the output relays, or destruction of the output transistors. As a counter­measure for such problems, external safety measures must be provided
to ensure safety in the system.

• When the 24-V DC output (service power supply to the PLC) is over­loaded or short-circuited, the voltage may drop and result in the outputs
being turned OFF. As a countermeasure for such problems, external
safety measures must be provided to ensure safety in the system.

!Caution Execute online editing only after confirming that no adverse effects will be

caused by extending the cycle time. Otherwise, the input signals may not be
readable.

• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.

!Caution Fail-safe measures must be taken by the customer to ensure safety in the

event of incorrect, missing, or abnormal signals caused by broken signal lines,
momentary power interruptions, or other causes. Serious accidents may
result from abnormal operation if proper measures are not provided.

!Caution Confirm safety at the destination node before changing or transferring to

another node the contents of a program, the PLC Setup, I/O tables, or I/O
memory. Changing or transferring any of these without confirming safety may
result in injury.

!Caution Tighten the screws on the terminal block of the AC Power Supply Unit to the

torque specified in the operation manual. The loose screws may result in
burning or malfunction.

xxiii

Operating Environment Precautions 4

4 Operating Environment Precautions

!Caution Do not operate the control system in the following locations:

• Locations subject to direct sunlight.

• Locations subject to temperatures or humidity outside the range specified
in the specifications.

• Locations subject to condensation as the result of severe changes in tem­perature.

• Locations subject to corrosive or flammable gases.

• Locations subject to dust (especially iron dust) or salts.

• Locations subject to exposure to water, oil, or chemicals.

• Locations subject to shock or vibration.

!Caution Take appropriate and sufficient countermeasures when installing systems in

the following locations:

• Locations subject to static electricity or other forms of noise.

• Locations subject to strong electromagnetic fields.

• Locations subject to possible exposure to radioactivity.

• Locations close to power supplies.

5 Application Precautions

Observe the following precautions when using the Ethernet Unit.

!WARNING Always heed these precautions. Failure to abide by the following precautions

could lead to serious or possibly fatal injury.

• Always connect to a ground of 100
connecting to a ground of 100

• Always turn OFF the power supply to the CPU Unit and Slaves before
attempting any of the following. Not turning OFF the power supply may
result in malfunction or electric shock.

• Mounting or dismounting I/O Units, CPU Units, Memory Packs, or
Master Units.

• Assembling the Units.

• Setting DIP switches or rotary switches.

• Connecting cables or wiring the system.

• Connecting or disconnecting the connectors.

!Caution Failure to abide by the following precautions could lead to faulty operation of

the Ethernet Unit or the system, or could damage the Ethernet Unit. Always
heed these precautions.

Ω or less when installing the Units. Not

Ω or less may result in electric shock.

xxiv

• Interlock circuits, limit circuits, and similar safety measures in external cir­cuits (i.e., not in the Programmable Controller) must be provided by the
customer.

Application Precautions 5

• Always use the power supply voltages specified in the operation manuals.
An incorrect voltage may result in malfunction or burning.

• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied. Be particularly careful in places
where the power supply is unstable. An incorrect power supply may result
in malfunction.

• Install external breakers and take other safety measures against short-cir­cuiting in external wiring. Insufficient safety measures

• Make sure that all the Backplane mounting screws, terminal block screws,
and cable connector screws are tightened to the torque specified in the
relevant manuals. Incorrect tightening torque may result in malfunction.

• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.

• Remove the label after the completion of wiring to ensure proper heat dis­sipation. Leaving the label attached may result in malfunction.

• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals. Connection of bare stranded wires may result in
burning.

• Observe the following precautions when wiring the communications
cable.

• Separate the communications cables from the power lines or high-ten­sion lines.

• Do not bend the communications cables past their natural bending ra­dius.

• Do not pull on the communications cables.

• Do not place heavy objects on top of the communications cables.

• Always lay communications cable inside ducts.

• Use appropriate communications cables.

• Make sure that the terminal blocks, expansion cable connectors, and
other items with locking devices are locked in place.

• Wire all connections correctly according to instructions in this manual.

• Double-check all wiring and switch settings before turning ON the power
supply. Incorrect wiring may result in burning.

• Mount Units only after checking terminal blocks and connectors com­pletely.

• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in unexpected operation.

• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.

• Changing the operating mode of the PLC.

• Force-setting/force-resetting any bit in memory.

• Changing the present value of any word or any set value in memory.

• After replacing Units, resume operation only after transferring to the new
CPU Unit and/or Special I/O Units the contents of the DM Area, HR Area,
programs, parameters, and other data required for resuming operation.
Not doing so may result in an unexpected operation.

• Before touching a Unit, be sure to first touch a grounded metallic object in
order to discharge any static build-up. Not doing so may result in malfunc­tion or damage.

xxv

Conformance to EC Directives 6

• When transporting the Unit, use special packing boxes and protect it from
being exposed to excessive vibration or impacts during transportation.

• CPU Bus Units will be restarted when routing tables are transferred from
a Programming Device to the CPU Unit. Restarting these Units is required
to read and enable the new routing tables. Confirm that the system will
not be adversely affected before allowing the CPU Bus Units to be reset.

6 Conformance to EC Directives

6-1 Applicable Directives

•EMC Directives

• Low Voltage Directive

6-2 Concepts

EMC Directives

OMRON devices that comply with EC Directives also conform to the related
EMC standards so that they can be more easily built into other devices or the
overall machine. The actual products have been checked for conformity to
EMC standards (see the following note). Whether the products conform to the
standards in the system used by the customer, however, must be checked by
the customer.

EMC-related performance of the OMRON devices that comply with EC Direc­tives will vary depending on the configuration, wiring, and other conditions of
the equipment or control panel on which the OMRON devices are installed.
The customer must, therefore, perform the final check to confirm that devices
and the overall machine conform to EMC standards.

Note Applicable EMS (Electromagnetic Susceptibility) and EMI (Electromagnetic

Interference) Standards in the EMC (Electromagnetic Compatibility) stan­dards are as follows:

Ethernet Unit EMS EMI

CS1W-ETN21
CJ1W-ETN21

Low Voltage Directive

Always ensure that devices operating at voltages of 50 to 1,000 V AC and 75
to 1,500 V DC meet the required safety standards for the PLC (EN61131-2).

EN61000-6-2

EN61000-6-4
(Radiated emission: 10-m
regulations)

xxvi

SECTION 1

Introduction

This section introduces the functions and protocols used in Ethernet Unit communications services.

1-1 Ethernet Unit Communications Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 Functions Listed by Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-3 Table of Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1-4 Common Protocol Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1-4-1 SMTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1-4-2 POP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1-4-3 DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1

Ethernet Unit Communications Services Section 1-1

1-1 Ethernet Unit Communications Services

Service Main functions Counterpart device Reference

Mail send function Through intranet or

internet

Mail receive func­tion

FTP server func­tion

Socket service
function

Automatic clock
adjust function

FINS communica­tions

Through intranet or
internet (See note.)

Through intranet Used to automatically adjust the PLC's

Through intranet or
internet (See note.)

Used to e-mail specified I/O memory
data or a file (up to 1 MB) from the
PLC to the computer automatically
when a preset condition is met.

Used to perform operations in the PLC
from the computer, such as reading or
writing I/O memory data, backing up
data, changing the operating mode, or
transferring files (up to 1 MB).

Used to transfer large files between
the computer and PLC.

Used to transfer data between gen­eral-purpose applications and the
PLC.

internal clock.

Used to access the PLC from a com­puter (FINS application) or send mes­sage communications from one PLC
to another.

Note The PLC can be accessed with

FINS message communications
even from a DHCP client com­puter or computer with an
unspecified FINS node address.

Computer
(E-mail software)

Computer
(E-mail software)

Computer
(FTP client software)

Computer
(General applica­tions that do not use
FINS communica­tions)

SNTP Server SECTION 5

Computer
(User-created FINS
communications
application)

SECTION 2 Mail
Send Function

SECTION 3
Receive Mail
Function

SECTION 4
FTP Server

SECTION 6
Socket Services

Automatic Clock
Adjustment
Function

SECTION 7
Using FINS
Communica­tions to Create
Host Applica­tions

Note When transferring data through the internet, a global IP address must be

acquired for the Ethernet Unit.

1-2 Functions Listed by Purpose

Timing and

direction

User-specified tim­ing, sent from com­puter

User purpose Communications

Reading and writing
data in the CPU Unit's
I/O memory

Changing the CPU
Unit's operating mode

Performing operations
on EM file memory or
a Memory Card
installed in the CPU
Unit

Backing up the user
program or parameter
area in the CPU Unit

Reading or clearing
the error log in the
Ethernet Unit or CPU
Unit

Sending a specific
FINS command to a
specific Unit

service

Mail Receive
Function

Method Restrictions

IOMRead (I/O memory read) and
IOMWrite (I/O memory write) com­mands

ChangeMode command ---

FileWrite, FileRead, FileDelete,
and FileList commands

UMBackup (User program backup)
and PARAMBackup (Parameter
area backup) commands

ErrorLogRead and ErrorLogClear
commands

FinsSend command ---

The maximum data
size is 6,000
words.

The maximum data
size is 1 MB.

---

---

2

Table of Protocols Section 1-3

Timing and

direction

Automatic execu­tion when a preset
condition is met,
sent to computer
(See note.)

User-specified tim­ing, sent from com­puter

Performed at a set
time every day or
from the ladder
program

Temporarily con­necting a computer
to perform opera­tions from a FINS
application such as
the CX-Program­mer

Performing opera­tions from two or
more FINS appli­cations in the com­puter

User purpose Communications

Reading data in the
CPU Unit's I/O mem­ory

Reading data from a
Memory Card installed
in the CPU Unit

Receiving a user­defined message as
an e-mail

Performing operations
on EM file memory or
a Memory Card
installed in the CPU
Unit

Reading and writing
data in the CPU Unit's
I/O memory from a
general application
(not using FINS com­munications)

Automatically correct­ing the PLC's internal
clock

Performing online
operations on the CPU
Unit

service

Mail Send Func­tion

FTP Server Func­tion

Socket Service
Function

Automatic Clock
Adjust Function

FINS communica­tions

Method Restrictions

Specify a data file as an attached
file and specify the starting read
address and number of words.

Specify any file as an attached file. The maximum data

Store the desired message in
ASCII in the CPU Unit's I/O mem­ory.

Login to the Ethernet Unit from the
FTP client software and send the
FTP command.

Socket service operations can be
executed by executing the CMND
instruction or setting control bits in
the PLC.

Install the SNTP server in the net­work and schedule the synchroni­zation time in the Ethernet Unit.

One function stores the counter­part FINS nodes' connection infor­mation. Another function
automatically assigns node
addresses.

A function supports simultaneous
online connections of multiple
applications in the computer.

The maximum data
size is 6,000
words.

size is 1 MB.

The maximum
message length is
1,024 characters
(alphanumeric
characters only).

The data size is not
restricted. The IP
address for the
Ethernet Unit must
be private and
fixed.

The IP address for
the Ethernet Unit
must be private
and fixed.

---

The IP address for
the Ethernet Unit
must be private
and fixed.

---

Note Any one of the following conditions can be specified to send e-mail automati-

cally:
A periodic timer times out, the Mail Send Switch is turned from OFF to ON, a
specified word contains a particular value, a specified bit turns from OFF to
ON, the CPU Unit's operating mode changes, a fatal error occurs, or an event
is stored in the error log.

1-3 Table of Protocols

Communications

service

Mail Send Function SMTP Required SMTP SECTION 2 Mail

Protocol used Situation when used CX-

Programmer's

Unit setting tag

name

POP When using “POP before SMTP” POP
DNS When specifying the SMTP server and

POP server by host names

DNS

Reference

Send Function

3

Common Protocol Settings Section 1-4

Communications

service

Mail Receive Function SMTP Required SMTP SECTION 3

FTP Server Function FTP Optional User set SECTION 4

Socket Service Func­tion

Automatic Clock
Adjust Function

Creating a FINS com­munications host
application

Protocol used Situation when used CX-

POP Required POP
DNS When specifying the SMTP server and

POP server by host names

TCP/IP Optional User set SECTION 6
UDP/IP Optional User set
SNTP Required Automatic clock

DNS When specifying the SNTP server by a

host name

FINS Optional User set SECTION 7

Programmer's

Unit setting tag

name

DNS

synchronization
DNS

Reference

Receive Mail
Function

FTP Server

Socket Services

SECTION 5
Automatic Clock
Adjustment
Function

Using FINS
Communica­tions to Create
Host Applica­tions

1-4 Common Protocol Settings

1-4-1 SMTP

The SMTP server settings must be made in order to use the Mail Send Func­tion or Mail Receive Function.

Item Contents Default

Local mail address Set the mail address for the Ethernet Unit. None
Server specification

type

Select whether the SMTP server used for
sending mail is to be specified by IP
address or the host's domain name (i.e.,
host name).

IP Address

4

Common Protocol Settings Section 1-4

Item Contents Default

IP Address Set the IP address for the SMTP server

Host name Set the host domain name (i.e., the host

Port No. Set the port to be used for connecting to the

Use POP before
SMTP

used for sending mail.
This setting is enabled only when “IP

address” is selected as the method for
specifying the server.

name) for the SMTP server that is to be
used for sending mail.

This setting is enabled only when “host
name” is selected as the method for speci­fying the server.

SMTP server that is to be used for sending
mail.

This setting does not normally need to be
changed.

Select whether or not to use the mail receiv­ing method (POP before SMTP) in which
the POP server must be accessed (to
receive mail) before the SMTP server is
accessed (to send mail).

Note The “POP before SMTP” is an authentication function required when sending

mail (using the SMTP server). Normally, account name and password authen­tication is performed with the POP server because there isn't an authentica­tion process in the SMTP server. Most ISPs (Internet Service Providers) use
the “POP before SMTP” authentication method to verify users sending e-mail.

0.0.0.0

None

0
(No. 25 is used.)

Disabled

1-4-2 POP

Always enter the POP server settings when using the Mail Receive Function.
Also, set the POP server settings when using “POP before SMTP” in the Mail

Send Function.

5

Common Protocol Settings Section 1-4

Item Contents Default

Server specification
type

IP Address Set the IP address for the POP3 server

Host name Set the host domain name (i.e., the host

Port No. Set the port to be used for connecting to the

Account Name Sets the account name (up to 9 characters)

Mail password Sets the password (up to 8 characters) of

Server access inter­val time

Select whether the POP3 server used for
receiving mail is to be specified by IP
address or the host's domain name (i.e.,
host name).

used for receiving mail.
This setting is enabled only when “IP

address” is selected as the method for
specifying the server.

name) for the POP3 server that is to be
used for receiving mail.

This setting is enabled only when “host
name” is selected as the method for speci­fying the server.

POP3 server that is to be used for receiving
mail.

This setting does not normally need to be
changed.

of the account used to send and receive e­mail.

Only alphanumeric characters can be used.
If no account name is set, the portion of the

local e-mail address to the left of the @ will
be used. In this case, the number of charac­ters in the account name is not restricted.

the account used to send and receive e­mail.

Set the interval for sending and receiving
mail. Mail will be automatically sent and
received at the interval set here.

IP Address

0.0.0.0

None

0
(Number 110 is
used.)

None

None

0
(5 minutes)

1-4-3 DNS

6

The DNS server's settings must be entered when the POP3 server, SMTP
server, and SNTP server are specified with host names.