Omron CJ1W-PRT21 User manual

ZX-T Series
W510-E2-01
Machine Automation Controller
CJ-series
PROFIBUS Slave Unit
Cat. No. W510-E2-01 Note: Specifications subject to change without notice.
Authorized Distributor:
Printed in Europe
Cat. No. W510-E2-01 CJ-Series PROFIBUS Slave Unit for NJ-series CPU Unit OPERATION MANUAL
PROFIBUS Slave Unit
Operation Manual
for NJ-series CPU Unit
CJ1W-PRT21

1
Introduction
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
Introduction
Thank you for purchasing a CJ-series CJ1W-PRT21 PROFIBUS Slave Unit.
This manual contains information that is necessary to use the CJ-series CJ1W-PRT21 PROFIBUS
Slave Unit for an NJ-series CPU Unit. Please read this manual and make sure you understand the func-
tionality 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-PRT21 PROFIBUS Slave Unit
Intended Audience
Applicable Products

Introduction
2CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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
Introduction
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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 describes the variables and control systems of the CPU Unit and CPU
Unit status.
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
Simulation, Transferring Projects to
the Physical CPU Unit, and Opera-
tion
This section describes simulation of Controller operation and how to use the results
of simulation.
Section 8
CPU Unit Status
This section describes CPU Unit status.
Section 9
CPU Unit Functions
This section describes the functionality provided by the CPU Unit.
Section 10
Communications Setup
This section describes how to go online with the CPU Unit and how to connect to
other devices.
Section 11
Example of Actual Application Pro-
cedures
This section describes the procedures that are used to actually operate an NJ-series
Controller.
Section 12
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, system-
defined variable lists, data attribute lists, CJ-series Unit memory information, CJ-
series Unit memory allocation methods, and data type conversion information.

Introduction
4CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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 Sysmac Studio functions other than system design 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 PROFIBUS Master Units Operation Manual for NJ-series
CPU Unit (Cat. No. W509)
Section Description
Section 1
Features and System Configuration
This section provides an introduction to the PROFIBUS Master Units and their fea-
tures. It also describes the operating procedure and the specifications of the PROFI-
BUS Master Units.
Section 2
Nomenclature and Installation
This section describes the nomenclature, functionality and installation of the PROFI-
BUS Master Unit.
Section 3
Configuration Software
This section contains the procedures for installing the configuration software. It also
presents an overview of the Configuration software and discusses the main aspects
of defining a PROFIBUS configuration.
Section 4
Data Exchange with the CPU Unit
This section describes the data exchange between the CPU Unit and PROFIBUS
Master Unit and the definitions of the device variables for CJ-series Unit.
Section 5
Operation
This section describes how to operate the CJ1W-PRM21 PROFIBUS Master Unit in
a Network.
Section 6
Message Communications
This section describes the message service communications commands concept
sent from the user program in the CPU Unit.
Section 7
Troubleshooting and Maintenance
This section describes the troubleshooting procedure, event logs and maintenance
procedure for the PROFIBUS Master Unit.
Appendices ---

5
Introduction
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
CJ-series PROFIBUS Slave Units Operation Manual for NJ-series
CPU Unit (Cat. No. W510) (This Manual)
Section Description
Section 1
Features and System Configuration
This section provides a brief description of PROFIBUS-P. It also addresses the
overall specification and the communication performance of the CJ1W-PRT21
PROFIBUS-DP Slave Unit.
Section 2
Nomenclature and Installation
This section describes the nomenclature, functionality and installation of the PROFI-
BUS Slave Unit.
Section 3
Data Exchange with the CPU Unit
This section describes the data interface and data exchange between the NJ-series
CPU and the CJ1W-PRT21 PROFIBUS-DP Slave Unit.
Section 4
Troubleshooting and Maintenance
This section describes the troubleshooting procedure, event logs and maintenance
procedure for the CJ1W-PRT21 PROFIBUS Slave Unit.
Appendices ---
SmartSlice GRT1-Series PROFIBUS Communication Unit Operation
Manual (Cat. No. W04E)
Section Description
Section 1
Features and Specifications
This section provides an introductory overview of the GRT1 series SmartSlice I/O Units and
the GRT1-PRT PROFIBUS, Communication Unit, its functions and how to setup and
configure it for a PROFIBUS network.
Section 2
Installation and Wiring
This section contains the procedures for setting up the PROFIBUS network. It also
describes installing and wiring the Communication Unit as well as the GRT1-series
SmartSlice I/O Units.
Section 3
Setup and Operation
This section describes the operational aspects of the GRT1-PRT and the SmartSlice
I/O system.
Section 4
Troubleshooting and Maintenance
This section describes the troubleshooting procedures and maintenance operations
for the PROFIBUS Communication Unit.
Appendices
The appendices describe the following:
PROFIBUS Technology
Slave Diagnostics Messages
Explicit Messages
SmartSlice GRT1-Series Slice I/O Units Operation Manual (Cat. No.
W455)
Section Description
Section 1
Available Units and Features
This section describes the features of GRT1-series Slice I/O Units and lists the avail-
able Units.
Section 2
Shared Specifications and Func-
tions
This section describes the specifications and functions that are shared by all of the
Slice I/O Units.
Section 3
Installation and Wiring
This section provides information on installing and wiring the Slice I/O Units.
Section 4
Digital I/O Units
This section provides the specifications and shows the components, terminal
arrangements, wiring diagrams and dimensions for the Digital I/O Units.
Section 5
Analog I/O Units
This section provides the information required to operate Analog Input Units and
Analog Output Units.
Section 6
Temperature Input Units
This section provides the information required to operate Temperature Input Units.
Section 7
Counter Units and Positioning Unit
This section provides the information required to operate Counter Units and the Posi-
tioning Unit.

Introduction
6CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
Section 8
Other Units
This section provides the basic specifications for the other Units used in Slice I/O ter-
minals.
Section 9
Troubleshooting
This section describes error processing and troubleshooting procedures needed to
keep the Slice I/O Units operating properly.
Appendices
The appendices describe the following:
Explicit Messages
Standard Models
Power Consumption and Weight Tables
I/O Current Consumption Table
Precautions When Connecting Two-wire DC Sensors
CS/CJ-Series PROFIBUS Master Units Operation Manual (Cat. No.
W409)
Section Description
Section 1
Features and Specifications
This section provides an introductory overview of PROFIBUS, its functions and how
to setup and configure a network. It also addresses the PROFIBUS Master Units and
the configurator, their features and specifications.
Section 2
Installation and Wiring
This section shows the PROFIBUS device and identifies its controls and indicators. It
contains the procedures for installing the CS1/CJ1W-PRM21 PROFIBUS Master Unit
and configuring the PROFIBUS network.
Section 3
Configuration Software
This section contains the procedures for installing the configuration software. It also
presents an overview of the Configuration software and discusses the main aspects
of defining a PROFIBUS configuration.
Section 4
Allocated CIO and DM Words
This section describes the words allocated to the CS1/CJ1W-PRM21 PROFIBUS
Master Unit in the CIO and DM Areas.
Section 5
FINS Commands and Responses
This section describes the FINS message service communications commands con-
cept as well as the commands supported by the CS1/CJ1W-PRM21 PROFIBUS
Master Units.
Section 6
Operation
This section describes how to operate the CS1/CJ1W-PRM21 PROFIBUS Master
Unit in a Network. It will discuss setting up a network, configuring all the connected
devices and starting the network. Furthermore, it provides information the I/O data
exchange performance and it also provides information on how to monitor a network
using the Unit and CX-ConfiguratorFDT.
Section 7
Troubleshooting and Maintenance
This section describes the troubleshooting procedures and maintenance operations
for the CS1/CJ1W-PRM21, needed to keep the PROFIBUS network optimally work-
ing.
Appendix
The appendices describe the following:
Bus Parameters
Slave Diagnostics
I/O Data Conversions
Configuration Error and Warning Messages
Memory Card Backup Functions
Application Notes
C200HW-PRM21 Notes
Section Description

7
Introduction
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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)
stinUgnitnuoM3-4
4
stnenopmoCrellortnoCgnitcennoC1-3-4
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.

Introduction
8CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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.
In this manual, the CJ1W-PRT21 PROFIBUS Slave Unit may be referred to as the “PROFIBUS Slave
Unit” and the CJ1W-PRM21 PROFIBUS Master Unit may be referred to as the “PROFIBUS Master
Unit”.
Precaution on Terminology

9
Introduction
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
Sections in this Manual
Nomenclature and Installation
Data Exchange with the CPU Unit
Troubleshooting and Maintenance
Appendices
4
3
2
1
2
3
4
1I
1
Features and System Conguration
A
A
Index
I
I

14 CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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.

15
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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.

16 CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
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.

17
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)

18 CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
CONTENTS
Introduction ..............................................................................................................1
Relevant Manuals .....................................................................................................2
Manual Configuration ..............................................................................................3
Manual Structure ......................................................................................................7
Sections in this Manual ...........................................................................................9
CONTENTS ..............................................................................................................18
Read and Understand this Manual .......................................................................14
Safety Precautions .................................................................................................17
Precautions for Correct Use ..................................................................................28
Regulations and Standards ...................................................................................31
Unit Versions ..........................................................................................................33
Related Manuals .....................................................................................................35
Revision History .....................................................................................................36
Section 1 Features and System Configuration
1-1 Overview of PROFIBUS .......................................................................................................... 1-2
1-1-1 Introduction ................................................................................................................................ 1-2
1-1-2 PROFIBUS Communication Protocol ......................................................................................... 1-3
1-1-3 GSD File Technology ................................................................................................................. 1-4
1-1-4 Device Types .............................................................................................................................. 1-5
1-1-5 Bus Access Protocol .................................................................................................................. 1-5
1-1-6 Data Throughput ........................................................................................................................ 1-7
1-1-7 Diagnostic Functions .................................................................................................................. 1-7
1-1-8 Protection Mechanisms .............................................................................................................. 1-8
1-1-9 Network Operation Modes ......................................................................................................... 1-8
1-2 Configuring the CJ1W-PRT21 Slave Unit ........................................................................... 1-10
1-3 PROFIBUS Slave Unit ........................................................................................................... 1-14
1-3-1 Specifications ........................................................................................................................... 1-14
1-3-2 Performance ............................................................................................................................. 1-15
1-4 Basic Operating Procedures ............................................................................................... 1-17
1-4-1 Overview .................................................................................................................................. 1-17
Section 2 Nomenclature and Installation
2-1 Unit Components .................................................................................................................... 2-2
2-1-1 Nomenclature ............................................................................................................................. 2-2

19
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
2-1-2 Indicators ................................................................................................................................... 2-2
2-1-3 Switch Settings .......................................................................................................................... 2-3
2-1-4 PROFIBUS Connector ............................................................................................................... 2-4
2-2 Installing the PROFIBUS-DP Slave Unit ............................................................................... 2-5
2-2-1 System Configuration Precautions ............................................................................................ 2-5
2-2-2 Mounting .................................................................................................................................... 2-5
2-2-3 Handling Precautions ................................................................................................................. 2-6
2-2-4 External Dimensions .................................................................................................................. 2-7
2-3 Network Installation ................................................................................................................ 2-8
2-3-1 Network Structure ...................................................................................................................... 2-8
2-3-2 Bus Termination ....................................................................................................................... 2-10
2-3-3 PROFIBUS Cable Connector ...................................................................................................2-11
2-3-4 Shielding Precautions ...............................................................................................................2-11
Section 3 Data Exchange with the CPU Unit
3-1 Input and Output Data ............................................................................................................ 3-2
3-2 I/O Data Mapping .................................................................................................................... 3-3
3-3 I/O Data Format ....................................................................................................................... 3-5
3-4 PROFIBUS Startup Data ......................................................................................................... 3-6
3-5 Data Exchange with the CPU Unit ......................................................................................... 3-8
3-5-1 Data Flow ................................................................................................................................... 3-8
3-5-2 Accessing From the User Program ...........................................................................................3-11
3-6 Device Variables for CJ-series Unit (Software Switches, Statuses) ................................ 3-15
3-6-1 Software Switches (*_SwCmd) ................................................................................................ 3-15
3-6-2 Status Flags (*_SlvSta) ............................................................................................................ 3-16
3-7 Device Variables for CJ-series Unit (Configuration) ......................................................... 3-20
3-7-1 Slave Parameter Data (*_SlvParamSta) .................................................................................. 3-21
3-7-2 Slave Output Data (*_SlvOutSta) ............................................................................................. 3-22
3-8 CPU Status Information ....................................................................................................... 3-28
Section 4 Troubleshooting and Maintenance
4-1 Error Indicators ....................................................................................................................... 4-2
4-1-1 Determining Operating Status from the Indicators ..................................................................... 4-2
4-1-2 Errors During Initial Processing ................................................................................................. 4-3
4-1-3 Errors During Normal Operation ................................................................................................ 4-3
4-2 Standard and Extended Diagnostics .................................................................................... 4-5
4-3 Event Logs .............................................................................................................................. 4-6
4-3-1 Overview of the Event Logs ....................................................................................................... 4-6
4-3-2 Error Table ................................................................................................................................. 4-6
4-3-3 Error Descriptions ...................................................................................................................... 4-8
4-4 Maintenance and Replacement ........................................................................................... 4-10
4-4-1 Cleaning ................................................................................................................................... 4-10
4-4-2 Inspection ................................................................................................................................ 4-10
4-4-3 Replacing Faulty Units ..............................................................................................................4-11
4-4-4 Addition/Replacement of Units on the PROFIBUS Network .....................................................4-11

20 CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
Appendices
A-1 Differences of NJ Series from CJ series ..............................................................................A-2
A-1-1 Functional Difference .................................................................................................................A-2
A-1-2 Differences in Access Methods from a User Program ...............................................................A-2
A-2 GSD File for CJ1W-PRT21 ......................................................................................................A-7
A-3 Parameterization by the PROFIBUS Master Unit ...............................................................A-14
Index

17
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
Safety Precautions
The following notation is used in this manual to provide precautions required to ensure safe usage of an
NJ-series Controller. The safety precautions that are provided are extremely important to safety. Always
read and heed the information provided in all safety precautions.
The following notation is used.
Definition of Precautionary Information
WARNING
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. Additionally, there may be
severe property damage.
Caution Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury, or property damage.
Precautions for Safe Use
Indicates precautions on what to do and what not to do to ensure safe usage of the product.
Precautions for Correct Use
Indicates precautions on what to do and what not to do to ensure proper operation and performance.

18 CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
Symbols
The circle and slash symbol indicates operations that you must not do.
The specific operation is shown in the circle and explained in text.
This example indicates prohibiting disassembly.
The triangle symbol indicates precautions (including warnings).
The specific operation is shown in the triangle and explained in text.
This example indicates a precaution for electric shock.
The triangle symbol indicates precautions (including warnings).
The specific operation is shown in the triangle and explained in text.
This example indicates a general precaution.
The filled circle symbol indicates operations that you must do.
The specific operation is shown in the circle and explained in text.
This example shows a general precaution for something that you must do.