Omron NT-DRT21 User manual

NT-DRT21
DeviceNet (CompoBus/D)
Interface Unit
Operation Manual
Produced August 2000

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Notice:
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 dam-
age to property.
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
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 “PC”means Programmable Controller and is not used as an abbreviation for any-
thing else.
The abbreviation “PT”refers to OMRON NT-series and NTH-series Programmable Terminals. The
DeviceNet (CompoBus/D) Interface Unit is used with NT31, NT31C, NT631, and NT631C PTs.
“CS1 Series”refers to CS1H and CS1G PCs and related products.
“C Series”refers to C200H, C1000H(F), C2000H, C200HS, CPM1, and CQM1 PCs and related prod-
ucts.
“CVM1/CV Series”refers to CV500, CV1000, CV2000, and CVM1 PCs and related products.
“CPU Unit”refers to OMRON CS1-series, C200HX/HG/HE(-Z), C-series, and CVM1/CV-series CPU
Units.
“Support Tool”refers to the following NT-series Support Tools for Windows (Ver. 3.2 or later):
•Ver. 3.2: NT-ZJ3AT1-EV3/NT-ZJCAT1-EV3
•Ver. 4.1: NT-ZJCAT1-EV4
Only the above Support Tools can be used to create screen data for PTs to which the DeviceNet
(CompoBus/D) Interface Unit is mounted.
The term “host”refers to the control device (e.g., PC or computer) that controls the PT.
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 operation
of the product.
1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.

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OMRON, 2000
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permis-
sion of 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 informa-
tion contained in this publication.

TABLE OF CONTENTS
vii
PRECAUTIONS xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Intended Audience xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Operating Environment Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Application Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Conformance to EC Directives xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 Features of the DeviceNet Interface Unit 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 DeviceNet Functions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 System Configuration 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Outline of Configurator 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Functions of the DeviceNet (CompoBus/D) Interface Unit 10. . . . . . . . . . . . . . . . . . . . . . .
SECTION 2
Operating Procedures 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Operating Procedures Flowchart 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Simple System Configuration 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3
Network Design 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 Network Configuration 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Limitations on the Network Configuration 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Sharing the Communications Power Supply 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 Grounding the Network 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 Noise Precautions 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-6 Correcting Faulty Operation Caused by Noise 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-7 Sharing the Same Power Supply 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4
Installation and Network Connection 43. . . . . . . . . . . . . . .
4-1 Components and Their Functions 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 Mounting the Unit on the PT 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3 Connecting to the DeviceNet Network 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5
PT Settings and Operations 51. . . . . . . . . . . . . . . . . . . . . . .
5-1 Installing the System Program 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2 Structure of the System Menu 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3 Initializing DeviceNet (CompoBus/D) Memory Switches 57. . . . . . . . . . . . . . . . . . . . . . . .
5-4 Serial Port A Settings 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-5 DeviceNet (CompoBus/D) Memory Switch Settings 61. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-6 Checking the PT Settings 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-7 Checking Communications with the PT 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-8 Checking the System Program Version 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6
Remote I/O Communications 69. . . . . . . . . . . . . . . . . . . . . .
6-1 Overview of Remote I/O Communications 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Settings with the NT-series Support Tool 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 Allocating PT Memory to the Host (Master) 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4 Allocating PT Data to PT Memory 81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS
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SECTION 7
Message Communications 83. . . . . . . . . . . . . . . . . . . . . . . . .
7-1 Overview of Message Communications 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2 Using Message Communications 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-3 Explicit Messages 99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-4 Sample Program 103. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 8
Error Processing 107. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1 Error Screens Specific to the DeviceNet Interface Unit 108. . . . . . . . . . . . . . . . . . . . . . . . . .
8-2 Troubleshooting with the LED Indicators 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
A Device Protocol 111. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Comparison of System Program Functions 117. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Standard Models 119. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History 125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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About this Manual:
This manual describes the installation and operation of the NT-DRT21 DeviceNet (CompoBus/D) Inter-
face Unit and includes the sections described below. The DeviceNet Interface Unit can be used with the
NT31, NT31C, NT631, and NT631C Programmable Terminals (PTs).
Please read this manual carefully and be sure you understand the information provided before attempting
to install and operate a DeviceNet Interface Unit.
Section 1 describes the main features and basic functions of the DeviceNet (CompoBus/D) system and
the DeviceNet (CompoBus/D) Interface Unit.
Section 2 shows a simple system configuration example and basic procedures up to using the PT con-
nected to the DeviceNet Interface Unit.
Section 3 provides information required when designing a network, such as precautions regarding the
configuration of the DeviceNet network to which the CompoBus/D Interface Unit connects.
Section 4 explains how to mount the DeviceNet Interface Unit on the PT and connect the Unit to the Devi-
ceNet network.
Section 5 explains the PT settings and operations required to use the DeviceNet Interface Unit.
Section 6 shows how to use remote I/O communications with the DeviceNet Interface Unit and how to use
the PT when using remote I/O communications.
Section 7 explains how to use message communications with a DeviceNet Interface Unit and how to use
the PT when message communications are being used.
Section 8 explains how to troubleshoot errors that may occur when using the DeviceNet Interface Unit.
Refer to the CompoBus/D (DeviceNet) User’s Manual and the PT’s User’s Manual for more details.
The Appendices provide relevant DeviceNet protocol specifications, comparisons between different
system program versions, and a list of related products.
Copyrights and Trademarks
DeviceNet is a registered trademark of the Open DeviceNet Vendor Association.
The copyright to the software installed in the DeviceNet (CompoBus/D) Master Unit belongs to Woodhead
Industries Inc.
Microsoftand Windowsare either registered trademarks or trademarks of Microsoft Corporation in the
United States and/or other countries.
Other product names and company names that appear in this manual are trademarks or registered trade-
marks of their respective companies.
WARNING Failure to read and understand the information provided in this manual may result in
personal 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.
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Related Manuals
The following manuals are related to DeviceNet or PT applications. Refer to them as required. Catalog
suffixes showing the version and production site have been omitted. Be sure you have the correct version
for your region.
Application Contents Manual name Catalog
number
Connecting or
programming for a
PT connected to
DeviceNet
Connecting a PT with a DeviceNet Interface Unit to a
DeviceNet network.
Communications between the PT and DeviceNet
network.
Installing the system program for the DeviceNet
Interface Unit into the PT.
PT system menus for using the DeviceNet Interface
Unit.
DeviceNet (CompoBus/D)
Interface Unit Operation
Manual
(This manual)
V066
Operating a PT Descriptions of PT function and operation.
Refer to the Setup Manual for your PT for settings,
peripheral device connections, and other hardware
information. Refer to the Reference Manual for PT
NT31/NT31C
Setup Manual V062
information. Refer to the Reference Manual for PT
functions, details on screen elements, and host
communications.
A PT with a DeviceNet Interface Unit has
functionality equivalent to a PT with a model number
NT631/NT631C
Setup Manual V063
ending in “V1”(system program version 2.1). These
three manuals describe the functions of PTs with
model numbers ending in “V2.”Refer to Appendix B
Comparison of System Program Functions for details
on differences before using any functions.
NT31/NT631
Reference Manual V064
Creating or
transferring screen
data or installing
system programs
Descriptions of methods for creating and transferring
screens.
(The Support Tool is used to create and transfer
screens for the PT to which the DeviceNet Interface
Unit is mounted. You must use version 3.2 or later of
the Support Tool.)
NT-series Support Tool for
Windows
Operation Manual
V061
Constructing a
DeviceNet network Information on OMRON DeviceNet products and network configuration. DeviceNet (CompoBus/D)
Operation Manual W267
Refer to the DeviceNet (CompoBus/D) Operation
Manual for overall network details and using the DeviceNet (CompoBus/D)
Slave Operation Manual W347
Manual for overall network details and using the
DeviceNet Master Unit and refer to the DeviceNet
(CompoBus/D) Configurator Operation Manual for
detailed control and setting methods.
DeviceNet (CompoBus/D)
MULTIPLE I/O TERMINAL
Operation Manual
W348
DeviceNet (CompoBus/D)
Configurator Operation
Manual
W328

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PRECAUTIONS
This section provides general precautions for using the CS1-series Programmable Controllers (PCs) and related devices.
The information contained in this section is important for the safe and reliable application of Programmable Control-
lers. You must read this section and understand the information contained before attempting to set up or operate a PC
system.
1 Intended Audience xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Operating Environment Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Application Precautions xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Conformance to EC Directives xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1 Applicable Directives xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Concepts xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 Conformance to EC Directives xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4 Relay Output Noise Reduction Methods xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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3Safety Precautions
xii
1 Intended Audience
This manual is intended for the following personnel, who must also have knowl-
edge 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 ma-
chines, 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 using the DeviceNet (CompoBus/D) I/F
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 PC and all PC Units be used for the specified
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 PC System to the above-mentioned
applications.
3 Safety Precautions
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 unexpected
operation of the loads connected to the Unit. Any of the following operation 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 net-
work.
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.

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5Application Precautions
xiii
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
immediately after power has been turned OFF. Doing so may result in electric
shock.
Caution Execute online edit only after confirming that no adverse effects will be caused
by extending the cycle time. Otherwise, the input signals may not be readable.
Caution Confirm safety at the destination node before transferring a program to another
node or changing contents of the I/O memory area. Doing either 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.
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 tempera-
ture.
•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.
Caution The operating environment of the PC System can have a large effect on the lon-
gevity and reliability of the system. Improper operating environments can lead to
malfunction, failure, and other unforeseeable problems with the PC System. Be
sure that the operating environment is within the specified conditions at installa-
tion and remains within the specified conditions during the life of the system.
5 Application Precautions
Observe the following precautions when using the PC System.
•You must use the CX-Programmer (programming software that runs on Win-
dows) if you need to program more than one task. A Programming Console
can be used to program only one cyclic task plus interrupt tasks. A Program-
ming Console can, however, be used to edit multitask programs originally
created with the CX-Programmer.