Omron SYSMAC CS Series User manual

Cat. No. W409-E2-03 Note: Specifications subject to change without notice.
SYSMAC CS/CJ-series, PROFIBUS DPMaster UnitsOPERATION MANUALCat. No. W409-E2-03
OPERATION MANUAL
PROFIBUS Master Units
SYSMAC CS/CJ-series
CS1W-PRM21
CJ1W-PRM21
Cat. No. W409-E2-04
Authorised Distributor:
Printed in Europe
W409-E2-02+CS(CJ)1W-PRM21+OperManual.qxd 21.07.2005 16:13 Seite 1

SYSMAC CS/CJ-series
CS1W-PRM21
CJ1W-PRM21
PROFIBUS Master Units
Operation Manual
Revised May 29, 2006

ii

iii
Notice:
OMRON products are manufactured for use by a trained operator and only for the purposes described
in this manual.
The following conventions are used to classify and explain the precautions in this manual. Always
heed the information provided with them.
!DANGER Indicates information that, if not heeded, is likely to result in serious injury or loss of life.
!WARNING Indicates information that, if not heeded, could possibly result in serious injury or loss of
life.
!Caution Indicates information that, if not heeded, could possibly result in minor or relatively serious
injury, damage to the product or faulty operation.
OMRON Product References
All OMRON products are capitalized in this manual. The first letter of the word Unit is also capitalized
when it refers to an OMRON product, regardless of whether it appears in the proper name of the prod-
uct.
The abbreviation Ch appears in some displays and on some OMRON products. It often means word
and is abbreviated as Wd in the documentation.
The abbreviation PLC means Programmable Logic Controller.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient opera-
tion of the product.
1, 2, 3...Indicates various lists such as procedures, checklists etc.

iv
Trademarks and Copyrights
PROFIBUS, PROFIBUS FMS, PROFIBUS DP, PROFIBUS DP-V1, and PROFIBUS PA are trade-
marks of PROFIBUS International.
Microsoft, Windows, Windows NT, Windows 2000, Windows XP, Windows Explorer and ActiveX are
trademarks of Microsoft Corporation.
Sycon and CIF are trademarks of Hilscher GmbH.
HART®is a registered trademark of HART Communication Foundation.
Other product names and company names in this manual are trademarks or registered trademarks of
their respective companies.
The copyright of the PROFIBUS Master Unit belongs to OMRON Corporation.
OMRON, 2006
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o
r
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o
f
OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con-
stantly 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.

v
TABLE OF CONTENTS
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
5 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
SECTION 1
Features and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1-1 Overview of PROFIBUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-2 Setting up a PROFIBUS DP Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-3 PROFIBUS Master Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1-4 CX-Profibus Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
1-5 Basic Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
SECTION 2
Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2-1 Unit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2-2 Installing the CS1/CJ1W-PRM21 Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2-3 Initial Setup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2-4 Setting up a Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2-5 Defining PROFIBUS DP in the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
SECTION 3
Configuration Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3-1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3-2 CX-Profibus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3-3 CS1/CJ1W-PRM21 PROFIBUS Master DTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3-4 C200HW-PRM21 PROFIBUS DP Master DTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
3-5 Generic Slave Device DTM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
SECTION 4
Allocated CIO and DM Words . . . . . . . . . . . . . . . . . . . . . . . 109
4-1 Overview of Word Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
4-2 Allocated CIO Area Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

vi
TABLE OF CONTENTS
SECTION 5
FINS Commands and Responses. . . . . . . . . . . . . . . . . . . . . . 125
5-1 FINS Commands and Responses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
5-2 Command / Response Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
SECTION 6
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
6-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
6-2 Setting up a network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
6-3 Configuring the Slave Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
6-4 Configuring the Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
6-5 I/O Communication Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
6-6 Operating the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
6-7 Monitoring the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
6-8 PROFIBUS DP-V1 Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
SECTION 7
Troubleshooting and Maintenance . . . . . . . . . . . . . . . . . . . . 201
7-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
7-2 Troubleshooting Using LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
7-3 Troubleshooting Using Error Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
7-4 Troubleshooting the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
7-5 Troubleshooting Using the Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
7-6 Troubleshooting FINS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
7-7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
7-8 Replacing the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Appendices
A Bus Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
B Slave Diagnostics Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
C I/O Data Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
D Configurator Error and Warning Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
E Memory Card Backup Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
F Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
G C200HW-PRM21 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

ix
About this Manual
This manual describes the CS1W-PRM21 and CJ1W-PRM21 PROFIBUS DP and PROFIBUS DP-V1
Master Units. The Unit version number on the side case of the housing indicates supported functional-
ity. If no version number is shown, the version number is 1.0. The following table lists the functions sup-
ported per version number.
Unit version 3.0 includes the same functions as Unit version 1.0 and 2.0, in addition to PROFIBUS DP-
V1 Class 2 related functions. Unit version 3.0 will eventually replace Unit version 1.0 and 2.0.
The DTM versions are downward compatible. Newer versions also support features of previous Unit
versions.
Note Unless stated otherwise, specifications, descriptions and images in this manual apply to all
Unit versions of the CS1W-PRM21 and CJ1W-PRM21 Units. The indication PROFIBUS Mas-
ter Unit(s) will be used when referring to both unit types.
Note The basic functionality of PROFIBUS DP is sometimes referred to as PROFIBUS DP-V0. In
this document the term PROFIBUS DP will be used to indicate the basic functionality.
This manual describes how to install and operate the CS1W-PRM21 and CJ1W-PRM21 Units. Both
Units serve the same purpose: enable devices of various manufacturers to intercommunicate without
making any special interface adaptations. They are technically the same; they differ only in their phys-
ical dimensions and weight and the way they are connected to the backplane.
This manual also describes - to a lesser extent - how to configure the C200HW-PRM21 PROFIBUS
DP Master Unit using the CX-Profibus Configurator. For more information on the C200HW-PRM21
PROFIBUS DP Master Unit, refer to the C200H-series PROFIBUS DP Master Units Operation Manual
(W349-E2-@).
Please read this manual carefully so that you understand the information provided before installing or
using the PROFIBUS Master Unit. Start with the precautions in the following section. They describe
the operating environment and application safety measures which must be observed prior to and when
using the PROFIBUS Master Unit.
The sections of this manual are as follows:
Section 1 introduces the PROFIBUS Master Units and CX-Profibus.
Section 2 describes the installation and setup of the PROFIBUS Master Units.
Section 3 describes the installation of CX-Profibus and provides a overview.
Section 4 describes how the Units interface to the PLC CPU.
Section 5 describes the FINS commands supported by the PROFIBUS Master Units.
Section 6 describes the operational aspects of the PROFIBUS Master Units.
Section 7 provides procedures for troubleshooting the PROFIBUS network and the Units.
The Appendices contain information supplementary to the information in the main body of the man-
ual. They are referred to in the various sections as required.
Unit name Unit Version Supporting
DTM version
Functions supported
CJ1W-PRM21
CS1W-PRM21
1.0 0.1.0.1 and up PROFIBUS DP (Class 1) Master
2.0 0.2.0.0 and up PROFIBUS DP (Class 1) Master
PROFIBUS DP-V1 (Class 1) Master
Additional PROFIBUS DP acyclic services
3.0 0.3.0.0 PROFIBUS DP (Class 1) Master
PROFIBUS DP-V1 (Class 1 and Class 2) Master
Additional PROFIBUS DP acyclic services

x
Manual Products Contents Cat. No.
CS-series
Programmable Controllers
Operation Manual
SYSMAC CS-series
CS1G/H-CPU@@-E
Describes the installation and operation of
the CS-series PLCs.
W339-E1-@
CJ-series
Programmable controllers
operation Manual
SYSMAC CJ-series
CJ1G-CPU@@
Describes the installation and operation of
the CJ-series PLCs.
W393-E1-@
CS/CJ-series
Programmable Controllers
Programming Manual
SYSMAC CS/CJ-series
CS1G/H-CPU@@-E, CJ1G-
CPU@@
Describes the ladder diagram programming
instructions supported by CS/CJ-series
PLCs.
W394-E1-@
CS/CJ-series
Programmable Controllers
Instructions Reference Manual
SYSMAC CS/CJ-series
CS1G/H-CPU@@-E, CJ1G-
CPU@@
Describes the ladder diagram programming
instructions supported by CS-series and
CJ-series PLCs.
W340-E1-@
CS/CJ Series Communication
Commands Reference Manual
SYSMAC CS1G/H-
CPU@@-E CPU Units
Describes the C-series (Host Link) and
FINS communications commands used
with CS/CJ-series PLCs.
W342-E1-@
CX-Programmer
Operation Manual
SYSMAC WS02-CXP@@-E
CX-Programmer
Provides information on how to use the CX-
Programmer, programming software which
supports CS1/CJ1-series PLCs.
W414-E1-@
CX-Server
Run Time User Manual
CX-Server Provides information on how to use the CX-
Server communication driver software
which supports CS1/CJ1-series PLCs.
W391-E2-@
C200H-series PROFIBUS DP
Master Units
Operation Manual
SYSMAC C200H-series
C200HW-PRM21
Describes the Installation and Operation of
the C200HW-PRM21 PROFIBUS DP Mas-
ter Units.
W349-E2-@
CJ-series PROFIBUS DP
Slave unit
Operation Manual
SYSMAC CJ1-series
CJ1W-PRT21
Describes the Installation and Operation of
the CJ1W-PRT21 PROFIBUS DP Slave
Units.
W408-E2-@
SmartSlice GRT1-Series
PROFIBUS Communication
Unit Operation Manual
SmartSlice GRT1-Series
GRT1-PRT
Describes the Installation and Operation of
the SmartSlice GRT1_series GRT1-PRT
PROFIBUS Communication Unit.
W04E-EN-@
GT1-series PROFIBUS DP
Multiple I/O Terminal
Operation Manual
PRT1-COM & GT1-series Describes the Installation and Operation of
the PROFIBUS DP PRT1-COM and GT1-
series I/O Units.
W900-E2-@
C200H-series PROFIBUS DP
Slave unit
Operation Manual
SYSMAC C200H-series
C200HW-PRT21 PROFI-
BUS DP Slave unit
Describes the Installation and Operation of
the C200HW-PRT21 PROFIBUS DP Slave
Units.
W901-E2-@
F150-series PROFIBUS DP
Vision Sensor
Operation Manual
F150-C15E-3-PRT21
PROFIBUS DP Vision Sen-
sor
Describes the Installation and Operation of
the F150 PROFIBUS Vision Sensor.
Z143-E1-@
!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.

xi
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 NON-
INFRINGEMENT, 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.

xii
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.

xiii
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.

xv
PRECAUTIONS
This section provides general precautions for using the PROFIBUS Master Units, Programmable Controllers and related
devices.
The information contained in this section is important for the safe and reliable operation of the PROFIBUS Master
Units. You must read this section and understand the information contained before attempting to set up or operate
a PROFIBUS Master Unit and PLC system.
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
6-1 Applicable Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
6-2 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
6-3 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx

xvi
Intended Audience 1
1 Intended Audience
This manual is intended for the following personnel, who must also have a
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 specifica-
tions 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, amuse-
ment machines, safety equipment, and other systems, machines, and equip-
ment 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 OMRON
PROFIBUS Master Units. Be sure to read this manual before attempting to
use the Unit and keep this manual close at hand for reference during opera-
tion.
!WARNING It is extremely important that all PLC Units be used for their specified pur-
poses and under the specified conditions, especially in applications that can
directly or indirectly affect human life. You must consult your OMRON repre-
sentative before using a PLC System in 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 Never touch any of the terminals while power is being supplied. Doing so may
result in serious electrical shock or electrocution.
!WARNING Do not attempt to disassemble, repair, or modify any Units. Any attempt to do
so may result in malfunction, fire, or electric shock.
!WARNING Do not touch the Power Supply Unit while power is being supplied or immedi-
ately after power has been turned OFF. Doing so may result in electric shock.
!Caution Tighten the screws on the terminal block of the AC Power Supply Unit to the
torque specified in the operation manual. Loose screws may result in burning
or malfunction.

xvii
Operating Environment Precautions 4
!WARNING The CPU Unit refreshes I/O even when the program is stopped (i.e., even in
PROGRAM mode). Confirm safety thoroughly in advance before changing the
status of any part of memory allocated to I/O Units, Special I/O Units, or CPU
Bus Units. Any changes to the data allocated to any Unit may result in unex-
pected operation of the loads connected to the Unit. Any of the following oper-
ation may result in changes to memory status.
• Transferring I/O memory data to the CPU Unit from a Programming
Device.
• Changing present values in memory from a Programming Device.
• Force-setting/-resetting bits from a Programming Device.
• Transferring I/O memory files from a Memory Card or EM file memory to
the CPU Unit.
• Transferring I/O memory from a host computer or from another PC on a
network.
!WARNING Execute online edits only after confirming that no adverse effects will be
caused by extending the cycle time. Otherwise, the input signals may not be
readable.
4 Operating Environment Precautions
!Caution Do not operate the Unit in the following places:
• Locations subject to direct sunlight.
• Locations subject to temperatures or humidities outside the range speci-
fied in the specifications.
• Locations subject to condensation as the result of severe changes in tem-
perature.
• Locations subject to corrosive or flammable gases.
• Locations subject to dust (especially iron dust) or salt.
• Locations subject to exposure to water, oil, or chemicals.
• Locations subject to shock or vibration.
Provide proper shielding when installing in the following locations:
• Locations subject to static electricity or other sources of noise.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radiation.
• Locations near to power supply lines.
!Caution The operating environment of the PLC system can have a large effect on the
longevity and reliability of the system. Unsuitable operating environments can
lead to malfunction, failure and other unforeseeable problems with the PLC
system. Ensure that the operating environment is within the specified condi-
tions at installation time and remains that way during the life of the system.
Follow all installation instructions and precautions provided in the operation
manuals.

xviii
Application Precautions 5
5 Application Precautions
Observe the following precautions when using the PROFIBUS Master Unit.
!WARNING Failure to abide by the following precautions could lead to serious or possibly
fatal injury. Always heed these precautions.
• Always connect to a class-3 ground (100 Ωor less) when installing the
Units.
!Caution Failure to abide by the following precautions could lead to faulty operation or
the PLC or the system or could damage the PLC or PLC Units. Always heed
these precautions.
• Install double safety mechanisms to ensure safety against incorrect sig-
nals that may be produced by broken signal lines or momentary power
interruptions.
• When adding a new device to the network, make sure that the baud rate
is the same as other nodes.
• When adding a new slave device to the network, make sure that the
PROFIBUS Master Unit is in the OFFLINE state, to prevent unexpected
results when starting up the slave device.
• Use specified communications cables.
• Do not extend connection distances beyond the ranges given in the spec-
ifications.
• Always turn OFF the power supply to the personal computer, Slaves, and
Communications Units before attempting any of the following.
• Mounting or dismounting the PROFIBUS Master Unit, Power Supply
Units, I/O Units, CPU Units, or any other Units.
• Assembling a Unit.
• Setting DIP switches or rotary switches.
• Connecting or wiring the cables.
• Connecting or disconnecting connectors.
• Be sure that the terminal blocks, connectors, Memory Units, expansion
cables, and other items with locking devices are properly locked into
place. Improper locking may result in malfunction.
• Be sure that all the mounting screws, terminal screws, Unit mounting
screws, and cable connector screws are tightened to the torque specified
in the relevant manuals. Incorrect tightening torque may result in malfunc-
tion.
• 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 dis-
sipation. Leaving the label attached may result in malfunction.
• Always use the power supply voltage specified in this manual.
• Double-check all the wiring and connection of terminal blocks and con-
nectors before mounting the Units.
• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals.

xix
Application Precautions 5
• Observe the following precautions when wiring the communications
cable.
• Separate the communications cables from the power lines or high-ten-
sion lines.
• Do not bend the communications cables.
• Do not pull on the communications cables.
• Do not place heavy objects on top of the communications cables.
• Be sure to wire communications cable inside ducts.
• Use appropriate communications cables.
• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied 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-cir-
cuits in external wiring. Insufficient safety measures against short-circuits
may result in burning.
• Double-check all the wiring and switch settings before turning ON the
power supply.
• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera-
tion.
• When configuring a slave device on the network using PROFIBUS DP-V1
messaging services via the PROFIBUS Master Unit, make sure that the
PROFIBUS Master Unit is in the CLEAR state, to prevent unexpected
results when.
• 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 PC.
• 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,
and other data required for resuming operation. Not doing so may result in
an unexpected operation.
• When transporting or storing the product, cover the PCBs with electrically
conductive materials to prevent LSIs and ICs from being damaged by
static electricity, and also keep the product within the specified storage
temperature range.
• When transporting the Unit, use special packing boxes and protect it from
being exposed to excessive vibration or impacts during transportation.
• Do not attempt to disassemble, repair, or modify any Units.
• Do not attempt to remove the cover over the non-used connector hole on
the front of the CS1W-PRM21 Unit.