Omron CJ1W-DRM21 User manual

Machine Automation Controller
CJ-series
DeviceNet Units
DeviceNet Units
Operation Manual
for NJ-series CPU Unit
W497-E1-03
CJ1W-DRM21

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 permission 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 information contained in
this publication.
OMRON, 2011

1
Introduction
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Introduction
Thank you for purchasing a CJ-series CJ1W-DRM21 DeviceNet Unit.
This manual contains information that is necessary to use the CJ-series CJ1W-DRM21 DeviceNet Unit
for an NJ-series CPU Unit. Please read this manual and make sure you understand the functionality
and performance of the NJ-series CPU Unit before you attempt to use it in a control system.
Keep this manual in a safe place where it will be available for reference during operation.
This manual is intended for the following personnel, who must also have knowledge of electrical sys-
tems (an electrical engineer or the equivalent).
•Personnel in charge of introducing FA systems.
•Personnel in charge of designing FA systems.
•Personnel in charge of installing and maintaining FA systems.
•Personnel in charge of managing FA systems and facilities.
For programming, this manual is intended for personnel who understand the programming language
specifications in international standard IEC 61131-3 or Japanese standard JIS B3503.
This manual covers the following products.
CJ-series CJ1W-DRM21 DeviceNet Unit
Intended Audience
Applicable Products

Relevant Manuals
2CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Relevant Manuals
There are three manuals that provide basic information on the NJ-series CPU Units: the NJ-series CPU
Unit Hardware User’s Manual, the NJ-series CPU Unit Software User’s Manual, and the NJ-series
Instructions Reference Manual.
Most operations are performed from the Sysmac Studio Automation Software. Refer to the Sysmac Stu-
dio Version 1 Operation Manual (Cat. No. W504) for information on the Sysmac Studio.
Other manuals are necessary for specific system configurations and applications.
Read all of the manuals that are relevant to your system configuration and application to make the most
of the NJ-series CPU Unit.
NJ-series User’s Manuals
Basic information
Introduction to NJ-series Controllers
Setting devices and hardware
Using motion control
Using EtherCAT
Using EtherNet/IP
Using CJ-series Units
Software settings
Using motion control
Using EtherCAT
Using EtherNet/IP
Programming
Using motion control
Using EtherCAT
Using CJ-series Units
Programming error processing
Testing operation and debugging
Using motion control
Using EtherCAT
Using EtherNet/IP
Maintenance
Using EtherCAT
Using EtherNet/IP
Using CJ-series Units
NJ-series CPU Unit Hardware User´s Manual NJ-series CPU Unit Software User´s Manual NJ-series Instructions Reference Manual NJ-series CPU Unit Motion Control User´s Manual
NJ-series CPU Unit Built-in EtherCAT Port User´s Manual
NJ-series Motion Control Instructions Reference Manual
NJ-series CPU Unit Built-in EtherNet/IP Port User´s Manual NJ-series Troubleshooting Manual CJ-series Special Unit Operation Manuals for NJ-series CPU Unit
Troubleshooting and managing
errors in an NJ-series Controller
Use the
relevant
manuals for
references
according to
any error that
occurs.

3
Manual Configuration
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Manual Configuration
NJ-series CPU Unit Hardware User’s Manual (Cat. No. W500)
Section Description
Section 1
Introduction
This section provides an introduction to the NJ-series Controllers and their features,
and gives the NJ-series Controller specifications.
Section 2
System Configuration
This section describes the system configuration used for NJ-series Controllers.
Section 3
Configuration Units
This section describes the parts and functions of the configuration devices in the NJ-
series Controller configuration, including the CPU Unit and Configuration Units.
Section 4
Installation and Wiring
This section describes where and how to install the CPU Unit and Configuration Units
and how to wire them.
Section 5
Troubleshooting
This section describes the event codes, error confirmation methods, and corrections
for errors that can occur.
Section 6
Inspection and Maintenance
This section describes the contents of periodic inspections, the service life of the Bat-
tery and Power Supply Units, and replacement methods for the Battery and Power
Supply Units.
Appendices
The appendices provide the specifications of the Basic I/O Units, Unit dimensions,
load short-circuit protection detection, line disconnection detection, and measures for
EMC Directives.
NJ-series CPU Unit Software User’s Manual (Cat. No. W501)
Section Description
Section 1
Introduction
This section provides an introduction to the NJ-series Controllers and their features,
and gives the NJ-series Controller specifications.
Section 2
CPU Unit Operation
This section provides information that is necessary to use the CPU Unit, including
how the CPU Unit works and the operations that it performs depending on the status
of the CPU Unit.
Section 3
I/O Ports, Slave Configuration, and
Unit Configuration
This section describes how to use I/O ports, how to create the slave configuration
and unit configuration and how to assign functions.
Section 4
Controller Setup
This section describes the initial settings of the function modules.
Section 5
Designing Tasks
This section describes the task system and types of tasks.
Section 6
Programming
This section describes programming, including the programming languages and the
variables and instructions that are used in programming.
Section 7
Checking Operation and Actual
Operation
This section describes the items and procedures for checking the operation of an NJ-
series Controller, including offline debugging procedures.
Section 8
CPU Unit Functions
This section describes the functionality provided by the CPU Unit.
Section 9
Communications Setup
This section describes how to go online with the CPU Unit and how to connect to
other devices.
Section 10
Example of Actual Application Pro-
cedures
This section describes the procedures that are used to actually operate an NJ-series
Controller.
Section 11
Troubleshooting
This section describes the event codes, error confirmation methods, and corrections
for errors that can occur.
Appendices
The appendices provide the CPU Unit specifications, task execution times, specifica-
tions of individual system-defined variables, data attribute lists, CJ-series Unit mem-
ory information, CJ-series Unit memory allocation methods, and version information.

Manual Configuration
4CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Sysmac Studio Version 1 Operation Manual (Cat. No. W504)
Section Description
Section 1
Introduction
This section provides an overview and lists the specifications of the Sysmac Studio
and describes its features and components.
Section 2
Installation and Uninstallation
This section describes how to install and uninstall the Sysmac Studio.
Section 3
System Design
This section describes the basic concepts for designing an NJ-series System with the
Sysmac Studio and the basic operating procedures.
Section 4
Programming
This section describes how to create programs with the Sysmac Studio.
Section 5
Online Connections to a Controller
This section describes how to go online with a Controller.
Section 6
Debugging
This section describes how to debug the programs online on the Controller or debug
it offline with the Simulator.
Section 7
Other Functions
This section describes other functions that are supported by the Sysmac Studio,
including security functions and troubleshooting functions.
Section 8
Reusing Programming
This section describes how to reuse the programs that you create with the Sysmac
Studio.
Section 9
Support Software Provided with the
Sysmac Studio
This section describes the Support Software that is provided with the Sysmac Studio.
Section 10
Troubleshooting
This section describes the error messages that are displayed when you check a pro-
gram on the Sysmac Studio and how to correct those errors.
Appendices
The appendices describe the following:
Driver Installation for Direct USB Cable Connection
Specifying One of Multiple Ethernet Interface Cards
Online Help
Simulation Instructions
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit
(Cat. No. W497) (This Manual)
Section Description
Section 1
Features and System Configuration
This section provides an introduction to the DeviceNet Units and their features. It also
describes the operating procedure and the specifications of the DeviceNet Units.
Section 2
Nomenclature and Installation
This section describes the nomenclature, functionality and installation of the
DeviceNet Unit.
Section 3
Data Exchange with the CPU Unit
This section describes the data exchange between the CPU Unit and DeviceNet Unit
and the definitions of the device variables for CJ-series Unit.
Section 4
Remote I/O Master Communications
This section describes the remote I/O communications performed as a DeviceNet
master by the DeviceNet Unit.
Section 5
Remote I/O Slave Communications
This section describes the remote I/O communications performed as a DeviceNet
slave by the DeviceNet Unit.
Section 6
Message Communications
This section describes the message communications of the DeviceNet Unit.
Section 7
Other Functions
This section describes other functionality provided by the DeviceNet Unit.
Section 8
Communications Timing
This section describes the communications timing of the DeviceNet Unit and the per-
formances of the remote I/O communications and message communications.
Section 9
Troubleshooting and Maintenance
This section describes the troubleshooting procedure, event logs and maintenance
procedure for the DeviceNet Unit.
Appendices ---

5
Manual Configuration
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
DeviceNet Operation Manual (Cat. No. W267)
Section Description
Section 1
Introduction
This section provides an overview of the DeviceNet network, including features, func-
tionality, and types of connected devices such as Masters and Slaves.
Section 2
Network Configuraion and Wiring
This section describes the DeviceNet network configuration, the wiring method, and
details on the connected devices such as connectors.
Section 3
Communications Power Supply
Methods
This section describes the communications power supply methos.
Appendices This section provides a list of related products, describes dimensions of the con-
nected devices, and gives a list of corrent consumption of Masters and Slaves.
DRT2 Series DeviceNet Slaves Operation Manual (Cat. No. W404)
Section Description
Section 1
Smart Slaves and Features
This section provide a functional overview and descrives the types of Slaves.
Section 2
Example System Startup
This section provides the operating procedures for DeviceNet by using examples.
Section 3
Common Slave Specifications
This section provides specifications and indicator displays that are common to all
Slaves. It also describes the allocation of remote I/O memory for Smsty Salves.
Section 4
Function of All Slaves, General-pur-
pose Slaves, and Environment-
resistive Slaves
This section provides an overview funcionality provided by DRT2 Sries Slaves and
the operating procedure.
Section 5
General-purpose Slaves
This section describes the specificaions and the components, terminal arrangement,
basic procedures for wiring, and settings for General-purpose Slaves.
Section 6
Environment-resistive Slaves
This section describes the specifications, terminal arrangements, basic procedures
for wiring and settings for Environment-resistive Slaves (conforming to IP67).
Section 7
Analog Slaves
This section describes the specifications, terminal arrangements, wiring methods and
settings for Analog Slaves.
Section 8
Communications Timing
This section provides information on the response time and the transmission delay
time when the remote I/O communications or message commucnaitions are perform-
red.
Section 9
Troubleshooting and Maintenance
This section describes the troublushooting and mentainance procedures to take cor-
rective actions for errors and conduct a routine inspection.
Appendix
This section provides an overview of explicit messages, a list of commands, and
informaion on how to use setting files (EDS files) that are required in the multi-vendor
environments. It also gives a list of the device profiles of Slaves and a list of Slaves
and connected devices.

Manual Configuration
6CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
GT1 Series DeviceNet Multiple I/O Terminal Operation Manual (Cat.
No. 348)
Section Description
Section 1
Multiple I/O Terminal
This section describes the features, system configuration, types of Units and funci-
tons provided by the Multiple I/O Terminals.
Section 2
Hardeare Setup and Operationa
Check
This section describes the operating procedures for the Multiple I/O Terminals by
using examples.
Section 3
Sample Programs
This section provides sample programs to use the Special I/O Units of the Multiple
I/O Terminals.
Section 4
Basic I/O Unit Specifications
This section describes the specifications of the each Basic I/O Unit, terminal arrange-
ments, wiring methods.
Section 5
Special I/O Unit Specifications
This section describes the specifications, terminal arrangements, wiring methods of
the each Special I/O Unit.
Section 6
Communications Timing
This section describes the response time and transmission delay time of the remote
I/O commucnaitions functions.
Section 7
Troublushooting and Maintenance
This section describes the troublushooting and mentainance procedures to take cor-
rective actions for errors and conduct a routine inspection.
Appendices
This section provides the device profiles of Slaves that are required in the multi-ven-
dor environments and gives a list of products including Multiple I/O Terminals and
connected devices.
CVM1/CV-series and C200HX/HG/HE/HS DeviceNet Master Units
Operation Manual (Cat. No. W379)
Section Description
Section 1
Features and System Configuration
This section describes the features of the DeviceNet and the operating procedure for
the DeviceNet Master Unit.
Section 2
Master Unit Components and Instal-
lation
This section describes the component names, functionality and installation of the
DeviceNet Master Units.
Section 3
Remote I/O commucanitons
This section describes the remote I/O master function provided by the DeviceNet
Master Unit.
Section 4
Message Communications
This section describes the message commucniations performed by the DeviceNet
Master Unit.
Section 5
Software Switches and Status Area
This section describes the details on the software switches used to control the
DeviceNet Unit and the status area.
Section 6
Communications Timing
This section describes the communication timing of the DeviceNet Master Unit and
the performances of the remote I/O communciations and message communications.
Section 7
Troubleshooting and Maintenance
This section describes the troublushooting and mentainance procedures to take cor-
rective actions for errors and conduct a routine inspection.
Appendix This section describes the details on the commands for the message communcia-
tions and the completion codes of the message communications.

7
Manual Configuration
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
CS/CJ Series DeviceNet Unit Operation Manual (Cat. No. W380)
Section Description
Section 1
Features and System Configuration
This section provides an overview of the DeviceNet Units and their features. It also
describes the operating procedure and the specifications of the DeviceNet Units.
Section 2
Nomeclature and Installation
This section describes the nomenclature, functionality and installation of the
DeviceNet Unit.
Section 3
Allocated CIO and DM Words
This section describes the data exchange between the CPU Unit and DeviceNet Unit
and the definitions of the CIO and DM words allocated to the DeviceNet Unit.
Section 4
Remote I/O Master Communications
This section describes the remote I/O communications performed as a DeviceNet
master by the DeviceNet Unit.
Section 5
Remote I/O Slave Communications
This section describes the remote I/O communications performed as a DeviceNet
slave by the DeviceNet Unit.
Section 6
Message Communications
This section describes the message communications of the DeviceNet Unit.
Section 7
Other Functions
This section describes other functionality provided by the DeviceNet Unit.
Section 8
Communciations Timing
This section describes the communications timing of the DeviceNet Unit and the per-
formances of the remote I/O communications and message communications.
Section 9
Troublueshooting and Maintenance
This section describes the troubleshooting procedure, event logs and maintenance
procedure for the DeviceNet Unit.
Appendix ---
CX-Integrator Ver.2. @Operation Manual (Cat. No. W464)
Section Description
Section 1
Overview
This section provides an overview of the CX-Integrator and describes the CX-Integra-
tor menus and connecitions.
Section 2
Basic Operations
This section describes the basic operations used for the CX-Integrator.
Section 3
Trouting Tables
This section describes how to set the routing tables. For NJ-series, routing table is
created by using Sysmac Studio instead of CX-Integrator.
Section 4
Data Links for Controller Link and
SYSMAC LINK
This section describes how to set data links for Controller Link and SYSMAC LINK
networks.
Section 5
Ethernet
This section describes the operations specific to Ethernet.
Section 6
DeviceNet
This section describes the settings and operations unithe to DeviceNet networks
including registeing slaves in the master, I/O allocations, and devide monitoring.
Section 7
CompoNet
This section describes the basic usage of CompoNet networks and how to set Con-
poNet parameters.
Section 8
CompoWay/F
This section describes the settings and operations specific to the CompoWay/F sys-
tem.
Section 9
NT Link
This section describes the settings and operations specific to the NT Link system.
Section 10
Network Testing
This section describes the operations of the network test tool.
Appendices This section describes the CPS files for Ethernet, Controller Link, CompoWay/F and
NT Link Networks, and EDS files for DeviceNet Networks.

Manual Structure
8CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Manual Structure
The following page structure is used in this manual.
Special information in this manual is classified as follows:
Note References are provided to more detailed or related information.
Page Structure
Special Information
Precautions for Safe Use
Precautions on what to do and what not to do to ensure safe usage of the product.
Precautions for Correct Use
Precautions on what to do and what not to do to ensure proper operation and performance.
Additional Information
Additional information to read as required.
This information is provided to increase understanding or make operation easier.
4-9
4 Installation and Wiring
NJ-series CPU Unit Hardware User’s Manual (W500)
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4
4-3 Mounting Units
The Units that make up an NJ-series Controller can be connected simply by pressing the Units together
and locking the sliders by moving them toward the back of the Units. The End Cover is connected in the
same way to the Unit on the far right side of the Controller.
1Join the Units so that the connectors fit exactly.
2The yellow sliders at the top and bottom of each Unit lock the Units together. Move the sliders
toward the back of the Units as shown below until they click into place.
Precautions for Correct UsePrecautions for Correct Use
The sliders on the tops and bottoms of the Powe r Supply Unit, CPU Unit, I/O Units, Special I/O
Units, and CPU Bus Units must be completely locked (until they click into place) after connecting
the adjacent Unit connectors.
4-3-1 Connecting Controller Components
Connector
Hook Hook holes
Slider
Lock
Release
Move the sliders toward the back
until they lock into place.
Level 1 heading
Level 2 heading
Level 3 heading
Level 2 heading
A step in a procedure
Manual name
Special information
Level 3 heading
Page tab
Gives the current
headings.
Indicates a procedure.
Icons indicate
precautions, additional
information, or reference
information.
Gives the number
of the main section.
This illustration is provided only as a sample. It may not literally appear in this manual.

9
Manual Structure
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
In this manual, “download” refers to transferring data from the Sysmac Studio to the physical Controller
and “upload” refers to transferring data from the physical Controller to the Sysmac Studio.
For the Sysmac Studio, synchronization is used to both upload and download data. Here, “synchronize”
means to automatically compare the data for the Sysmac Studio on the computer with the data in the
physical Controller and transfer the data in the direction that is specified by the user.
Precaution on Terminology

Manual Structure
10 CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)

11
Sections in this Manual
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Sections in this Manual
Troubleshooting and Maintenance
9
Appendices
A
Communications Timing
8
6
5
Nomenclature and Installation
Data Exchange with the CPU Unit
Remote I/O Master Communications
Remote I/O Slave Communications
Message Communications
Other Functions
7
4
3
2
1
2
3
4
5
6
7
9
8
A
1I
1I
Index
Features and System
Configuration

12 CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
CONTENTS
CONTENTS
Introduction ...............................................................................................................1
Relevant Manuals ......................................................................................................2
Manual Configuration ...............................................................................................3
Manual Structure .......................................................................................................8
Sections in this Manual ..........................................................................................11
CONTENTS...............................................................................................................12
Read and Understand this Manual ........................................................................16
Safety Precautions ..................................................................................................19
Precautions for Safe Use........................................................................................24
Precautions for Correct Use...................................................................................30
Regulations and Standards....................................................................................33
Unit Versions ...........................................................................................................36
Related Manuals ......................................................................................................38
Revision History......................................................................................................39
Section 1 Features and System Configuration
1-1 DeviceNet Unit Features ......................................................................................................... 1-2
1-2 Specifications .......................................................................................................................... 1-7
1-2-1 DeviceNet Unit ............................................................................................................................ 1-7
1-3 Overview of CX-Integrator ....................................................................................................1-13
1-4 Basic Operating Procedures ................................................................................................ 1-14
1-4-1 Network Installation Procedure ................................................................................................. 1-14
1-4-2 DeviceNet Unit Startup Procedure ............................................................................................ 1-15
1-4-3 Message Communications Only (Neither Master nor Slave Function Used) ............................ 1-21
1-5 List of Usage Methods by Purpose...................................................................................... 1-22
Section 2 Nomenclature and Installation
2-1 Nomenclature and Functions ................................................................................................. 2-2
2-1-1 Nomenclature and Functions ...................................................................................................... 2-2
2-1-2 Switch Settings............................................................................................................................ 2-5
2-2 Installing the DeviceNet Unit .................................................................................................. 2-9
2-2-1 System Configuration Precautions.............................................................................................. 2-9
2-2-2 Mounting ..................................................................................................................................... 2-9
2-2-3 Handling Precautions................................................................................................................ 2-10
2-2-4 External Dimensions ................................................................................................................. 2-10

13
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
CONTENTS
Section 3 Data Exchange with the CPU Unit
3-1 Data Exchange with the CPU Unit.......................................................................................... 3-2
3-1-1 Data Flow.................................................................................................................................... 3-2
3-1-2 Accessing From the User Program............................................................................................. 3-4
3-2 Device Variables for CJ-series Unit (Software Switches, Statuses) ................................... 3-9
3-2-1 Software Switches 1 ................................................................................................................... 3-9
3-2-2 Software Switches 2 (n + 1CH) ................................................................................................ 3-18
3-2-3 Master COS Send Switches ..................................................................................................... 3-23
3-2-4 Disconnect/Connect Switches .................................................................................................. 3-24
3-2-5 Unit Status 1 ............................................................................................................................. 3-25
3-2-6 Unit Status 2 ............................................................................................................................. 3-30
3-2-7 Master Status 1......................................................................................................................... 3-33
3-2-8 Master Status 2......................................................................................................................... 3-38
3-2-9 Slave Status 1........................................................................................................................... 3-39
3-2-10 Slave Status 2........................................................................................................................... 3-45
3-2-11 Registered Slave Table ............................................................................................................. 3-46
3-2-12 Normal Slave Table................................................................................................................... 3-47
3-2-13 C200H Master Replacement Master Status 1 .......................................................................... 3-48
3-3 Device Variables for CJ-series Unit (Allocations Setting Table, Slave Detailed Status) . 3-51
3-3-1 Communications Cycle Time Setting........................................................................................ 3-51
3-3-2 Master User-set Allocations Setup Table.................................................................................. 3-53
3-3-3 Slave User-set Allocations Setup Table .................................................................................... 3-56
3-3-4 Communications Cycle Time Reference Table......................................................................... 3-58
3-3-5 Master User-set Allocations Reference Table........................................................................... 3-58
3-3-6 Slave User-set Allocations Reference Table ............................................................................. 3-60
3-3-7 Slave Detailed Status ............................................................................................................... 3-61
Section 4 Remote I/O Master Communications
4-1 Master Remote I/O Communications ..................................................................................... 4-2
4-1-1 Allocations .................................................................................................................................. 4-2
4-1-2 Remote I/O Master Specifications .............................................................................................. 4-5
4-1-3 Precautions on the Number of Master Units............................................................................... 4-6
4-1-4 Procedure for Using Remote I/O Master .................................................................................... 4-8
4-2 Scan List................................................................................................................................. 4-11
4-2-1 Scan List................................................................................................................................... 4-11
4-2-2 Scan List Enabled and Scan List Disabled ............................................................................... 4-12
4-2-3 Backing Up the Scan List.......................................................................................................... 4-13
4-3 Fixed Allocations................................................................................................................... 4-14
4-3-1 Allocated Words........................................................................................................................ 4-14
4-3-2 Allocation Procedures............................................................................................................... 4-15
4-3-3 Changing System Components................................................................................................ 4-18
4-3-4 Fixed Allocations Example........................................................................................................ 4-19
4-4 User-set Allocations .............................................................................................................. 4-20
4-4-1 Settings through CX-Integrator ................................................................................................. 4-22
4-4-2 Settings through Device Variables for CJ-series Unit
(Master User-set Allocations Setup Table) ............................................................................... 4-25
4-5 Starting and Stopping Remote I/O Communications ......................................................... 4-31
4-5-1 Starting Remote I/O Communications ...................................................................................... 4-31
4-5-2 Stopping Remote I/O Communications .................................................................................... 4-31
4-5-3 Restarting Remote I/O Communications .................................................................................. 4-31
4-6 Example of User Program for Remote I/O Communications ............................................. 4-32
4-7 Errors that May Occur in Remote I/O Communications..................................................... 4-33

14 CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
CONTENTS
Section 5 Remote I/O Slave Communications
5-1 Slave Remote I/O Communications ....................................................................................... 5-2
5-1-1 Allocation Methods...................................................................................................................... 5-2
5-1-2 Remote I/O and Slave Communications Specifications..............................................................5-3
5-1-3 Procedures for Using Remote I/O Slave Communications ......................................................... 5-4
5-2 Fixed Allocations ..................................................................................................................... 5-7
5-2-1 Allocated Words .......................................................................................................................... 5-7
5-3 User-set Allocations ................................................................................................................ 5-9
5-3-1 Setting through CX-Integrator ..................................................................................................... 5-9
5-3-2 Settings through Device Variables for CJ-series Unit
(Slave User-set Allocations Setup Table) .................................................................................. 5-12
Section 6 Message Communications
6-1 Overview................................................................................................................................... 6-2
6-1-1 Outline of Message Communications .........................................................................................6-2
6-1-2 Explicit Message Communications ............................................................................................. 6-3
6-1-3 Message Communications Specifications................................................................................... 6-4
6-1-4 Message Communications Error Indications............................................................................... 6-5
6-1-5 Message Monitoring Timer ......................................................................................................... 6-5
6-1-6 Message Communications Errors ............................................................................................... 6-5
6-2 Sending Explicit Messages ....................................................................................................6-7
6-2-1 Sending Explicit Messages ......................................................................................................... 6-8
6-2-2 Sending Explicit Messages Using SendCmd Instruction .......................................................... 6-11
6-3 Receiving Explicit Messages................................................................................................ 6-16
6-3-1 List of PLC Object Services ...................................................................................................... 6-17
Section 7 Other Functions
7-1 SD Memory Card Backup Functions...................................................................................... 7-2
7-1-1 Outline of Functions .................................................................................................................... 7-3
7-1-2 File Names.................................................................................................................................. 7-4
Section 8 Communications Timing
8-1 Remote I/O Communications Characteristics....................................................................... 8-2
8-1-1 Communications Cycle Time ...................................................................................................... 8-2
8-1-2 Calculating Guidelines for I/O Response Times ......................................................................... 8-5
8-1-3 More than One Master in Network .............................................................................................. 8-7
8-1-4 System Startup Time .................................................................................................................. 8-8
8-2 Message Communications ................................................................................................... 8-10
8-2-1 Message Communications Time............................................................................................... 8-10
8-2-2 Calculating the Maximum Message Response Time ................................................................ 8-11
Section 9 Troubleshooting and Maintenance
9-1 Troubleshooting with the DeviceNet Unit Indicators............................................................ 9-2
9-1-1 Determining Operating Status from the Indicators ...................................................................... 9-2
9-1-2 Troubleshooting Errors Occurring in the DeviceNet Unit............................................................. 9-4
9-2 Error Log Functions .............................................................................................................. 9-28
9-2-1 Error Log Table.......................................................................................................................... 9-28
9-2-2 Error Codes and Detail Codes .................................................................................................. 9-29

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CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
CONTENTS
9-3 Troubleshooting..................................................................................................................... 9-32
9-3-1 CPU Unit's ERR/ALM Indicator Lit or Flashing ......................................................................... 9-32
9-3-2 Remote I/O Communications Disabled..................................................................................... 9-32
9-3-3 I/O Link Problems ..................................................................................................................... 9-33
9-3-4 Communications Error Operation Settings ............................................................................... 9-34
9-3-5 Scan List Problems................................................................................................................... 9-34
9-4 Event Logs ............................................................................................................................. 9-35
9-4-1 Overview of the Event Logs...................................................................................................... 9-35
9-4-2 Error Table ................................................................................................................................ 9-36
9-4-3 Error Descriptions..................................................................................................................... 9-41
9-5 Maintenance and Replacement ............................................................................................ 9-60
9-5-1 Cleaning.................................................................................................................................... 9-60
9-5-2 Inspection ................................................................................................................................. 9-60
9-5-3 Replacing Faulty Units .............................................................................................................. 9-61
Appendices
A-1 Differences in Available Functions Depending on the CPU Unit (NJ or CJ Series) ..........A-2
A-1-1 Functional Differences ................................................................................................................ A-2
A-1-2 Differences in Accessing from User Program............................................................................. A-2
A-2 DeviceNet Connections ........................................................................................................A-35
A-3 DeviceNet Explicit Message Send Command for Other Manufacturer Nodes.................A-41
A-3-1 Explicit Message Send (2801) .................................................................................................. A-41
A-4 Multi-vendor Applications ....................................................................................................A-43
Index
Index ................................................................................................Index-2

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16 CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Read and Understand this Manual
Please read and understand this manual before using the products. 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.

17
Read and Understand this Manual
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
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.

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18 CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
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.