Omron CJ1W-SCU32, CJ1W-SCU22, CJ1W-SCU42 Operation Manual
Machine Automation Controller
CJ-series
Serial Communications Units
Operation Manual
for NJ-series CPU Unit
CJ1W-SCU22
CJ1W-SCU32
CJ1W-SCU42
Serial Communications Units
W494-E1-03
OMRON, 2011
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.
Introduction
Thank you for purchasing an CJ-series CJ1W-SCU@2 Serial Communications Units.
This manual contains information that is necessary to use with the 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.
Intended Audience
This manual is intended for the following personnel, who must also have knowledge of electrical systems (an electrical engineer or the equivalent).
• Personnel in charge of 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 f acilities.
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.
Introduction
Applicable Products
This manual covers the following products.
CJ-series Serial Communications Units
• CJ1W-SCU22
• CJ1W-SCU32
• CJ1W-SCU42
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
1
Relevant Man uals
Relevant Manuals
There are three manuals that pr o vide b asic 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 perf ormed from the Sysmac Studio A ut omation Softw are . Ref er t o the Sysmac Studio 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.
Basic information
NJ-series User’s Manuals
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
Troubleshooting and managing
errors in an NJ-series Controller
NJ-series CPU Unit
Hardware User´s Manual
Use the
relevant
manuals for
references
according to
any error that
occurs.
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
Maintenance
Using EtherCAT
Using EtherNet/IP
Using CJ-series Units
2
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Manual Configuration
NJ-series CPU Unit Hardware User's Manual (Cat. No. W500)
Section Description
Section 1
Introduction
Section 2
System Configuration
Section 3
Configuration Units
Section 4
Installation and Wiring
Section 5
Troubleshooting
Section 6
Inspection and Maintenance
Appendices
This section provides an introduction to the NJ-series Controllers and their features,
and gives the NJ-series Controller specifications.
This section describes the system configuration used for NJ-series Controllers.
This section describes the parts and functions of the configuration devices in the NJseries Controller configuration, including the CPU Unit and Configuration Units.
This section describes where and how to install the CPU Unit and Configuration Units
and how to wire them.
This section describes the event codes, error confirmation methods, and corrections
for errors that can occur.
This section describes the contents of periodic inspections, the service life of the Battery and Power Supply Units, and replacement methods for the Battery and Power
Supply Units.
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.
Manual Configuration
NJ-series CPU Unit Software User's Manual (Cat. No. W501)
Section Description
Section 1
Introduction
Section 2
CPU Unit Operation
Section 3
I/O Ports, Slave Configuration, and
Unit Configuration
Section 4
Controller Setup
Section 5
Designing Tasks
Section 6
Programming
Section 7
Checking Operation and Actual
Operation
Section 8
CPU Unit Functions
Section 9
Communications Setup
Section 10
Example of Actual Application Procedures
Section 11
Troubleshooting
Appendices
This section provides an introduction to the NJ-series Controllers and their features,
and gives the NJ-series Controller specifications.
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.
This section describes how to use I/O ports, how to create the slave configuration
and unit configuration and how to assign functions.
This section describes the initial settings of the function modules.
This section describes the task system and types of tasks.
This section describes programming, including the programming languages and the
variables and instructions that are used in programming.
This section describes the items and procedures for checking the operation of an NJseries Controller, including offline debugging procedures.
This section describes the functionality provided by the CPU Unit.
This section describes how to go online with the CPU Unit and how to connect to
other devices.
This section describes the procedures that are used to actually operate an NJ-series
Controller.
This section describes the event codes, error confirmation methods, and corrections
for errors that can occur.
The appendices provide the CPU Unit specifications, task execution times, specifications of individual system-defined variables, data attribute lists, CJ-series Unit memory information, CJ-series Unit memory allocation methods, and version information.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
3
Manual Configuration
Sysmac Studio Version 1 Operation Manual (Cat. No. W504)
Section Description
Section 1
Introduction
Section 2
Installation and Uninstallation
Section 3
System Design
Section 4
Programming
Section 5
Online Connections to a Controller
Section 6
Debugging
Section 7
Other Functions
Section 8
Reusing Programming
Section 9
Support Software Provided with the
Sysmac Studio
Section 10
Troubleshooting
Appendices
This section provides an overview and lists the specifications of the Sysmac Studio
and describes its features and components.
This section describes how to install and uninstall the Sysmac Studio.
This section describes the basic concepts for designing an NJ-series System with the
Sysmac Studio and the basic operating procedures.
This section describes how to create programs with the Sysmac Studio.
This section describes how to go online with a Controller.
This section describes how to debug the programs online on the Controller or debug
it offline with the Simulator.
This section describes other functions that are supported by the Sysmac Studio,
including security functions and troubleshooting functions.
This section describes how to reuse the programs that you create with the Sysmac
Studio.
This section describes the Support Software that is provided with the Sysmac Studio.
This section describes the error messages that are displayed when you check a program on the Sysmac Studio and how to correct those errors.
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 Serial Communications Units Operation Manual for NJseries CPU Unit (Cat. No. W494) (this manual)
Section Description
Section 1
Introduction
Section 2
Initial Settings and Allocations of
Device Variables for CJ-series Unit
Section 3
Installation and Wiring
Section 4
Using Protocol Macros
Section 5
Serial Gateway
Section 6
No-protocol Mode
Section 7
Using Modbus-RTU Slave Mode
Section 8
Loopback Test
Section 9
Troubleshooting and Maintenance
Reference
Appendix ---
This section provides an introduction to the Serial Communications Units and their
features. It also describes the operating procedure and the specifications of the
Serial Communications Units.
This section describes the data exchange between the CPU Unit and Serial Communications Unit and the definitions of the device variables for CJ-series Unit.
This section describes where and how to install the Serial Communications Unit, and
how to connect and wire them.
This section describes the protocol macro function provided by the Serial Communications Unit and the procedure for using the function.
This section describes the Serial Gateway function provided by the Serial Communications Unit and the procedure for using the function.
This section describes the No-protocol Mode function provided by the Serial Communications Unit to send/receive data, and the procedure for using the function.
This section describes the Modbus-RTU Slave Mode function provided by the Serial
Communications Unit, the procedure for using the function and the details of the
command responses.
This section describes the loopback test function provided by the Serial Communications Unit and the procedure for using the function.
This section describes the troubleshooting procedure, event logs and maintenance
procedure for the Serial Communications Unit.
This section describes the details on the standard system protocols provided by the
CX-Protocol and the Serial Communications Unit.
4
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Manual Configuration
SYSMAC CS/CJ Series Serial Communications Boards Serial
Communications Units OPERATION MANUAL (Cat. No. W336)
Section Description
Section 1
Introduction
Section 2
Initial Settings and I/O Memory
Allocations
Section 3
Installation and Wiring
Section 4
Using Host Link Communications
Section 5
Using Protocol Macros
Section 6
Serial Gateway
Section 7
No-protocol Mode
Section 8
Using 1:N NT Links
Section 9
Using Modbus-RTU Slave Mode
Section 10
Communications Performance
Section 11
Loopback Test
Section 12
Troubleshooting and Maintenance
Appendices ---
This section introduces the features, specifications, and procedures of the Serial
Communications Boards and the Serial Communications Units.
This section describes the data exchange between the CPU Unit and the Serial Communications Boards/Serial Communications Units, and the I/O memory allocation.
This section describes how to mounting the Serial Communications Board and Serial
Communications Units, and how to connect the ports to external devices.
This section describes the procedure and other information required to use Host Link
communications.
This section describes the procedure and other information required to use the protocol macros.
This section describes the procedure and other information required to use the Serial
Gateway.
This section describes the procedure and other information required to use the noprotocol mode.
This section describes the procedure and other information required to use the 1:N
NT Links to Programmable Terminals
This section describes the procedure and other information required to use the
Modbus-RTU slave mode.
This section describes the communications performance of the Serial Communications Boards and the Serial Communications Units.
This section describes the procedure and other information required to conduct loopback test.
This section describes the troubleshooting and maintenance procedures for the
Serial Communications Boards and the Serial Communications Unit.
CX-Protocol Ve r.1.9 OPERATION MANUAL (Cat. No. W344)
Section Description
Section 1
Introduction
Section 2
Installing/Uninstalling/Starting/
Ending
Section 3
Protocol Macro
Section 4
Using the Protocol Macro Function
Section 5
Object Creation
Section 6
Project and Protocol Editing
Section 7
Sequence Setting and Editing
Section 8
Step Setting and Editing
Section 9
Setting and Editing Messages and
Matrix Lists
Section 10
Communications PLC Setup and
Online Connections
This section introduces the Protocol Macro function, the features and specifications
of the CX-Protocol, and outline of the standard system protocol.
This section outlines the functions of the CX-Protocol and describes installation procedure, startup/shutdown, and the user interface for the CX-Protocol.
This section describes details of the protocol macro functions.
This section describes the communications sequence and settings for the protocol
macro function.
This section describes how to create objects, such as projects, protocols, sequences,
steps, messages, and matrices.
This section describes details of the editing of projects and protocols.
This section describes details of the creating, setting and editing of sequences.
This section describes details of the creating, setting and editing of steps.
This section describes details of the creating, setting and editing of messages and
matrix lists.
This section describes details of the communications settings and online connections.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
5
Manual Configuration
Section Description
Section 11
Protocol Data Transferring and
Printing
Section 12
Tracing and Monitoring
Section 13
Error and Error Log Display
Section 14
Troubleshooting
Section 15
Help
Appendices ---
CX-Integrator Ver.2. Operation Manual (Cat. No. W464)
Section Description
Section 1
Overview
Section 2
Basic Operations
Section 3
Routing Tables
Section 4
Data Links for Controller Link and
SYSMAC LINK
Section 5
Ethernet
Section 6
DeviceNet
Section 7
CompoNet
Section 8
CompoWay/F
Section 9
NT Links
Section 10
Network Testing
Appendices
This section describes details of the transferring, converting, and printing of protocol
data.
This section describes details of PLC memory area monitoring and the transmission
line tracing.
This section describes details of the displaying of errors and the error log. This function cannot be used in NJ series.
This section lists the error messages and describes their causes and remedies.
This section describes the online help services.
This section provides an overview of the CX-Integrator and describes the CX-Integrator menus and connecitions.
This section describes the basic operations used for the CX-Integrator.
This section describes how to set the routing tables. For NJ-series, routing table is
created by using Sysmac Studio instead of CX-Integrator.
This section describes how to set data links for Controller Link and SYSMAC LINK
networks.
This section describes the operations specific to Ethernet.
This section describes the settings and operations unithe to DeviceNet networks
including registeing slaves in the master, I/O allocations, and devide monitoring.
This section describes the basic usage of CompoNet networks and how to set ConpoNet parameters.
This section describes the settings and operations specific to the CompoWay/F system.
This section describes the settings and operations specific to the NT Link system.
This section describes the operations of the network test tool.
This section describes the CPS files for Ethernet, Controller Link, CompoWay/F and
NT Link Networks, and EDS files for DeviceNet Networks.
6
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Manual Structure
Page Structure
The following page structure is used in this manual.
Manual Structure
Level 2 heading
Level 3 heading
A step in a procedure
Indicates a procedure.
Special information
Icons indicate
precautions, additional
information, or reference
information.
4 Installation and Wiring
4-3 Mounting Units
4-3-1 Connecting Controller Components
The Units that make up an NJ-series Controller ca n b e c o nn ec te d si m pl y b y p re s s in g th e Un i t s t o g e t h e r
and locking the sliders by moving them toward the bac k of th e Un its . Th e E nd Co ver is connecte d in t h e
same way to the Unit on the far right side of the Controller.
1 Join the Units so that the connectors fit exactly.
2 The 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 Power Supply Unit, CPU Unit, I/O Units, Special I/O
Units, and CPU Bus Units must be completely locked (until they c l ick into place) after connecting
the adjacent Unit connectors.
Hook
Connector
Move the sliders toward the back
until they lock into place.
Hook holes
Release
Lock
Slider
Level 1 heading
Level 2 heading
Level 3 heading
Gives the current
headings.
stinU gnitnuoM 3-4
4
stnenopmoC rellortnoC gnitcennoC 1-3-4
Page tab
Gives the number
of the main section.
Manual name
NJ-series CPU Unit Hardware User’s Manual (W500)
This illustration is provided only as a sample. It may not literally appear in this manual.
Special Information
Special information in this manual is classified as follows:
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 unde rstanding or make operation easier.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
4-9
7
Manual Structure
Version Information
Information on differences in specifications and functionality for CPU Units with different unit versions
and for different versions of the Sysmac Studio is given.
Note References are provided to more detailed or related information.
Precaution on Terminology
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 , "synchron iz e"
means to automatically compare t he data for the Sysmac Studio on the comp uter with the data in the
physical Controller and tran sfer the data in the direction that is specified by the user .
8
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Sections in this Manual
Sections in this Manual
1R
1R
2A
3I
4
5
6
Introduction
Initial Settings and
Allocations of Device
Variable for CJ-series Unit
Installation and
Wiring
Using Protocol
Macros
Serial Gateway
No-protocol Mode
A Standard
System Protocol
Appendices
Index
2A
3I
4
5
6
7
8
Using Modbus-RTU Slave Mode
7
8
9
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Loopback Test
Troubleshooting and Maintenance
9
9
CONTENTS
CONTENTS
Introduction ...............................................................................................................1
Relevant Manuals......................................................................................................2
Manual Configuration ...............................................................................................3
Manual Structure.......................................................................................................7
Sections in this Manual ............................................................................................9
CONTENTS...............................................................................................................10
Read and Understand this Manual ........................................................................15
Safety Precautions..................................................................................................18
Precautions for Safe Use........................................................................................23
Precautions for Correct Use...................................................................................29
Regulations and Standards....................................................................................32
Unit Versions ...........................................................................................................35
Related Manuals......................................................................................................37
Revision History......................................................................................................38
Section 1 Introduction
1-1 Using this Manual....................................................................................................................1-2
1-2 Overview................................................................................................................................... 1-3
1-3 Protocol Overview ................................................................................................................... 1-5
1-3-1 Protocol Macros..........................................................................................................................1-6
1-3-2 Loopback Test.............................................................................................................................1-6
1-3-3 Serial Gateway Mode.................................................................................................................. 1-6
1-3-4 No-protocol Mode........................................................................................................................ 1-7
1-3-5 Modbus-RTU Slave Mode...........................................................................................................1-7
1-4 Features.................................................................................................................................... 1-8
1-4-1 Serial Communications Units......................................................................................................1-8
1-4-2 Protocols.....................................................................................................................................1-8
1-5 System Configurations ......................................................... ... ... ... ... .................................... 1-10
1-5-1 Protocol Macro, Serial Gateway, No-protocol, or Modbus-RTU Slave......................................1-10
1-6 Specifications ........................................................................................................................ 1-14
1-6-1 Serial Communications Unit......................................................................................................1-14
1-6-2 General Specifications.................................. ... .................................... ... ..................................1-15
1-7 Selecting the Serial Communications Mode....................................................................... 1-22
10
1-8 Basic Operating Procedure .................................................. ... ... .......................................... 1-23
1-8-1 Overview...................................................................................................................................1-23
1-8-2 Explanation of Procedure. .... .....................................................................................................1-24
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
CONTENTS
Section 2 Initial Settings and Allocations of Device V ariable f or CJ-
series Unit
2-1 Component Names and Functions ........................................................................................ 2-2
2-2 Data Exchange with the CPU Unit .......................................................................................... 2-8
2-2-1 Data Flow.................................................................................................................................... 2-8
2-2-2 How to Specify and Create Variables ....................................................................................... 2-12
2-3 Device Variable for CJ-series Unit ....................................................................................... 2-14
2-3-1 Allocations of Device Variable for CJ-series Unit......................................................................2-14
2-3-2 Device Variable for CJ-series Unit for System Settings............................................................2-14
2-3-3 Device Variable for CJ-series Unit for Software Switches......................................................... 2-23
2-3-4 Device Variable for CJ-series Unit for Status............................................................................2-24
2-4 System-defined Variable....................................................................................................... 2-34
Section 3 Installation and Wiring
3-1 Installing Serial Communications Units................................................................................ 3-2
3-1-1 System Configuration Precautions ............................................................................................. 3-2
3-1-2 Serial Communications Unit Installation Procedure.................................................................... 3-2
3-1-3 Unit Handling Precautions.......................................................................................................... 3-3
3-2 Wiring ....................................................................................................................................... 3-4
3-2-1 Wiring Precautions ................... ... ... ... .................................... ... .................................... .............. 3-4
3-2-2 Port Types...................................................................................................................................3-4
3-2-3 Communications Modes and Ports.............................................................................................3-4
3-2-4 Connector Pin Layout................................................................................................................. 3-5
3-2-5 Mounting Height and Connector Cover Dimensions................................................................... 3-6
3-2-6 Reducing Electrical Noise for External Wiring............................................................................ 3-7
3-2-7 2-Wire and 4-Wire Connections..................................................................................................3-7
3-2-8 NT-AL001 Link Adapter Settings.................................................................................................3-8
3-2-9 Connections for Protocol Macro, Serial Gatewa y, No-protocol Mode,
and Modbus-RTU Slave Mode....................................................................................................3-9
3-2-10 Connections in Loopback Test...................................................................................... ... ......... 3-18
3-3 RS-232C and RS-422A/485 Wiring ....................................................................................... 3-19
3-3-1 Recommended RS-232C Wiring Examples ....................... ..................................... ... .............. 3-19
3-3-2 Recommended RS-422A/485 Wiring Examples......................................................... .............. 3-20
3-3-3 Wiring RS-232C Connectors on the CJ1W-SCU22/42............................................................. 3-22
3-3-4 Soldering .................................................................................................................................. 3-23
3-3-5 Assembling Connector Hood....................................................................................................3-24
3-3-6 Wiring RS-422A/485 Terminal-block Connectors on the CJ1W-SCU32/42..............................3-25
3-3-7 Connecting to Unit....................................................................... .. ... ........................................ 3-26
Section 4 Using Protocol Macros
4-1 Overview of the Protocol Macro Function............................................................................. 4-2
4-1-1 Protocol Macros..........................................................................................................................4-2
4-1-2 Using the Protocol Macros............................... .. ... ..................................... .. ............................... 4-2
4-1-3 Protocol Structure....................................................................................................................... 4-4
4-1-4 Data Exchange Method for Link Words.................................................................................... 4-10
4-2 Device Variables for CJ-series Unit and System-defined Variables
(Protocol Macro Mode) ... ... ... ................................................................................................. 4-13
4-2-1 Device Variable for CJ-series Unit for System Settings............................................................4-13
4-2-2 Area Descriptions .....................................................................................................................4-15
4-2-3 System-defined Variable............................................................................................... ... ......... 4-21
4-2-4 Devices Variable for CJ-series Unit for Software Switches.......................................................4-22
4-2-5 Device Variables for CJ-series Unit for Status.......................................................................... 4-24
4-2-6 Protocol Status .........................................................................................................................4-32
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
11
CONTENTS
4-3 Using Protocol Macros..........................................................................................................4-40
4-3-1 Executing Communications Sequences....................................................................................4-40
4-3-2 User Program Example.............................................................................................................4-42
Section 5 Serial Gateway
5-1 Serial Gateway Overview ........................................................................................................5-2
5-1-1 Overview.....................................................................................................................................5-2
5-1-2 Operating Conditions ................................................................ ..................................... .............5-2
5-1-3 Features......................................................................................................................................5-3
5-1-4 Serial Gateway Specifications.....................................................................................................5-4
5-2 Device Variables for CJ-series Unit and System-defined Variables
(During Serial Gateway Mode)................................................................................................5-5
5-2-1 Device Variables for CJ-series Unit f or System Settings......................... ... .................................5-5
5-2-2 System-defined Variable.............................................................................................................5-8
5-2-3 Device Variable for CJ-series Unit for Software Switches...........................................................5-9
5-2-4 Device Variable for CJ-series Unit f or Status..............................................................................5-9
5-3 Using the Serial Gateway...................................................................................................... 5-12
5-3-1 Setting Device Variable for CJ-series Unit for System Settings and Software Switches...........5-12
5-3-2 Sending Messages Using the SendCmd Instruction.................................................................5-14
5-3-3 Using the Serial Gateway Function When Protocol Macros Are Executed...............................5-15
5-4 Protocol Conversion.............................................................................................................. 5-22
5-4-1 Types of Protocol Conversion....................................................................................................5-22
5-4-2 Converting to CompoWay/F................................................... ... ..................................... .. .........5-23
5-4-3 CompoWay/F Connection Examples ........................................................................................5-25
5-4-4 Converting to Modbus-RTU.. ... .. ..................................... ... .. ..................................... ... ... ...........5-26
5-4-5 Converting to Modbus-ASCII .......................................................... .. ... ... ..................................5-28
5-5 Serial Gateway ....................................................................................................................... 5-29
5-5-1 Serial Gateway Execution Timing for Protocol Macros.............................................................5-29
5-5-2 Serial Gateway Timeout Monitoring..........................................................................................5-31
5-5-3 Other Functions.........................................................................................................................5-32
5-6 Communications Frames...................................................................................................... 5-33
5-6-1 CompoWay/F ............................................................................................................................5-33
5-6-2 Modbus-RTU.............................................................................................................................5-34
5-6-3 Modbus-ASCII...........................................................................................................................5-36
Section 6 No-protocol Mode
6-1 Overview................................................................................................................................... 6-2
6-1-1 Definition.....................................................................................................................................6-2
6-1-2 Specifications..............................................................................................................................6-3
6-1-3 Connections for No-protocol Mode .............................................................................................6-4
6-2 Device Variables for CJ-series Unit and System-defined Variables
(No-protocol Mode)6-5
6-2-1 Device Variables for CJ-Series Unit f or System Settings......................................... ... ... .............6-5
6-2-2 System-defined Variable.............................................................................................................6-8
6-2-3 Device Variable for CJ-series Unit for Software Switches...........................................................6-8
6-2-4 Device Variable for CJ-series Unit f or Status..............................................................................6-8
6-2-5 Device Variable for CJ-series Unit for Status (When Sending/Receiving Data
with SerialSend, SerialRcv, or SerialRcvNoClear Instruction) ..................................................6-11
6-3 Using Serial Port I/O Instructions ........................................................................................ 6-12
6-3-1 System Settings...................................................................................... ... ...............................6-12
6-3-2 Instruction Execution Methods.................................................. ... .................................... ... ......6-12
12
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Section 7 Using Modbus-RTU Slave Mode
7-1 Modbus-RTU Slave System................. .... ... ... ......................................................................... 7-2
7-1-1 Modbus-RTU Slave System........................................................................................................7-2
7-1-2 Modbus-RTU Specifications....................................................................................................... 7-2
7-1-3 Communicating with NJ-series CPU Units Using Modbus ......................................................... 7-3
7-2 Device Variables for CJ-series Unit and System-defined Variables
(Modbus-RTU Slave Mode) ..................................................................................................... 7-5
7-2-1 Device Variable for CJ-series Unit for System Settings.............................................................. 7-5
7-2-2 System-defined Variable............................................................................................... ... ...........7-8
7-2-3 Device Variable for CJ-series Unit for Software Switches........................................................... 7-8
7-2-4 Device Variable for CJ-series Unit.............................................................................................. 7-9
7-3 Command and Response Details......................................................................................... 7-13
7-3-1 Supported Modbus-RTU Commands ....................................................................................... 7-13
7-3-2 Command and Response Details............................................................................................. 7-14
Section 8 Loopback Test
CONTENTS
8-1 Executing Loopback Tests .....................................................................................................8-2
8-1-1 Overview.....................................................................................................................................8-2
8-1-2 Connection Method.....................................................................................................................8-2
8-1-3 Procedure...................................................................................................................................8-2
8-1-4 Indicators Used for the Loopback Test......................................... .. ... ..................................... ..... 8-3
8-2 Device Variable for CJ-series Unit (Loopback Test)............................................................. 8-4
8-2-1 Device Variables for CJ-Series Unit for System Settings............................................................8-4
8-2-2 Device Variables for CJ-Series Unit for Status ...........................................................................8-5
Section 9 Troubleshooting and Maintenance
9-1 Indicator Error Displays.......................................................................................................... 9-2
9-2 Communications Status Error Notification........................................................................... 9-3
9-2-1 Status Area Error Information.....................................................................................................9-3
9-3 Troubleshooting....................................................................................................................... 9-4
9-3-1 Serial Gateway (Serial Gateway or Protocol Macro Mode)................................ ... ......................9-4
9-3-2 No-protocol Mode.....................................................................................................................9-10
9-3-3 Protocol Macros........................................................................................................................9-16
9-3-4 Modbus-RTU Slave Mode.........................................................................................................9-22
9-4 Error Logs .............................................................................................................................. 9-25
9-4-1 Error Log Data..........................................................................................................................9-25
9-4-2 Error Contents and Details .......................................................................................................9-26
9-4-3 Error Codes and Troubleshooting.............................................................................................9-28
9-5 Event Logs ............................................................................................................................. 9-30
9-5-1 Overview of the Event Logs......................................................................................................9-30
9-5-2 Error Table ................................................................................................................................ 9-30
9-5-3 Error Descriptions..................................................................................................................... 9-36
9-6 Cleaning and Inspection.......................................................................................................9-53
9-6-1 Cleaning....................................................................................................................................9-53
9-6-2 Inspection .................................................................................................................................9-53
9-7 Replacement Precautions . ... .... ............................................................................................. 9-55
9-7-1 Precautions when Replacing Unit............................................................................................. 9-55
9-7-2 Settings after Replacing Unit.................................................................................................... 9-55
9-7-3 Replacing the Unit....................................................................................................................9-56
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
13
CONTENTS
A Standard System Protocol
R-1 Reading Reference Documents..............................................................................................R-3
R-1-1 Using Standard System Protocols ............................................................. ... .............................R-3
R-1-2 Standard System Protocols........................................................................................................ R-6
R-2 CompoWay/F Master Protocol................................................................................................R-7
R-2-1 CompoWay/F ............................................................................................................................. R-7
R-2-2 Communications Specifications................................................................................................. R-8
R-2-3 Transmission Procedure.............................................................................................................R-8
R-2-4 Command and Response Formats............................................................................................ R-8
R-2-5 CompoWay/F Master Protocol Sequences.............................................................................. R-12
R-2-6 CompoWay/F Message Frames and PMCR(260) Operands...................................... ... .......... R-12
R-2-7 Send/Receive with ASCII Conversion and with Response......................................................R-13
R-2-8 Structure of the Protocol .............................................................. ... .. ....................................... R-13
R-2-9 Connections.............................................................................................................................R-38
R-3 Mitsubishi Computer Link Master
(A-compatible 1C Frame, Model 1)R-41
R-3-1 Communications Specifications............................................................................................... R-41
R-3-2 Command/Response Formats.................................................................................................R-42
R-3-3 Command Frame Contents......................................................................................................R-43
R-3-4 Mitsubishi Computer Link Master Protocol Sequences............................................................ R-43
R-3-5 Structure of the Protocol .............................................................. ... ......................................... R-43
R-4 V500/V520 Bar Code Reader Protocol .................................................................................R-65
R-4-1 Connections.............................................................................................................................R-65
R-4-2 System Setting.................................................................................. ... .................................... R-66
R-4-3 Protocol Configuration.............................................................................................................. R-67
R-5 3Z4L Laser Micrometer Protocol.......................................... ... ... ... ... .... ... ... ... .... ... ... ... ... .... ...R-78
R-5-1 Connections.............................................................................................................................R-78
R-5-2 List of Operations with Laser Micrometer (5000/6000 Series)................................................. R-81
R-5-3 Protocol Configuration.............................................................................................................. R-83
R-6 Hayes Modem AT Command Protocol ...............................................................................R-117
R-6-1 Protocol Configuration............................................................................................................ R-117
R-6-2 Connections...........................................................................................................................R-119
R-6-3 Compatible Modems.................................................................... .................................... ...... R-119
R-6-4 Modem Settings........................... ............................... ... ........................................................R-120
R-6-5 Communication Errors...........................................................................................................R-125
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 Methods for Access from a User Program...........................................................A-3
A-2 Version Information...............................................................................................................A-12
Index
14
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Read and Understand this Manual
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 NONINFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.
In no event shall the re sponsibility of OMRON f or any act e xceed 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
CONTAMINA TION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
15
Read and Understand this Manual
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to t he
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 info rmation 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 e xhaustive list of all possible uses of the products, nor is it intended to imp ly th at 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.
• S ystems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the produ cts.
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 Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Read and Understand this Manual
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 specificat ions of the products may be changed
without any notice. When in doubt, special model numbers may be assigned t o fix or establish key
specifications for y our application on your request. Ple ase 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 t o be used for manufacturing purposes, even when
tolerances are shown.
PERFORMANCE DATA
Perf ormance data given in this manual is provided as a guide fo r 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.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
17
Safety Precautions
Safety Precautions
Definition of Precautionary Information
The following notation is used in this manual to provide precautions required to ensure safe usage of a
CJ-series Serial Communications Unit. 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.
Indicates a potentially hazardous situation which, if not avoided,
WARNING
could result in death or serious injury . Additionally, there may be
severe property damage.
Caution
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 pe rformance.
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury, or property damage.
18
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Symbols
Safety Precautions
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 warnin gs).
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 warnin gs).
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.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
19
Safety Precautions
During Power Supply
Do not touch any of the terminals or terminal blocks while the power is being
supplied. Doing so may result in electric shock.
Do not attempt to take any Unit apart. In particular, high-voltage parts are
present in the Power Supply Unit while power is supplied or immediately after
power is turned OFF. Touching any of these parts may result in electric
shock. There are sharp parts inside the Unit that may cause injury.
WARNING
Fail-safe Measures
Provide safety measures in external circuits to ensure safety in the system if
an abnormality occurs due to malfunction of the CPU Unit, other Units, or
slaves or due to other external factors affecting operation. Not doing so may
result in serious accidents due to incorrect operation.
Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.
The Controller outputs may remain ON or OFF due to deposition or burning
of the output relays or destruction of the output transistors. As a countermeasure for such problems, external safety measures must be provided to
ensure safe operation of the system.
The CPU Unit will turn OFF all outputs from Basic Output Units in the following cases. The remote I/O slaves will operate according to the settings in the
slaves.
• If an error occurs in the power supply
• If the power supply connection becomes faulty
• If a CPU watchdog timer error or CPU reset occurs
• If a major fault level Controller error occurs
• While the CPU Unit is on standby until RUN mode is entered after the
power is turned ON
External safety measures must be provided to ensure safe operation of the
system in such cases.
20
If external power supplies for slav es or other de vices are o v erloaded or shortcircuited, the voltage will drop, outputs will turn OFF, and the system may be
unable to read inputs. Provide external safety measures in controls with monitoring of external power supply voltage as required so that the system operates safely in such a case.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
WARNING
Fail-safe Measures
Unintended outputs may occur when an error occurs in variable memory or
in memory used for CJ-series Units. As a countermeasure for such problems, external safety measures must be provided to ensure safe operation of
the system.
Provide measures in the communications system and user program to
ensure safety in the overall system even if errors or malfunctions occur in
data link communications or remote I/O communications.
Safety Precautions
If there is interference in remote I/O communications or if a major fault level
error occurs, output status will depend on the products that are used.
Confirm the operation that will occur when there is interference in communications or a major fault level error, and implement safety measures.
Correctly set all of the EtherCAT slaves.
The NJ-series Controller continues normal operation for a certain period of
time when a momentary power interruption occurs. This means that the NJseries Controller may receive incorrect signals from external devices that are
also affected by the power interruption. Accordingly, take suitable actions,
such as external fail-safe measures and interlock conditions, to monitor the
power supply voltage of the external device as required.
You must take fail-safe measures to ensure safety in the event of incorrect,
missing, or abnormal signals caused by broken signal lines, momentary
power interruptions, or other causes. Not doing so may result in serious accidents due to incorrect operation.
Voltage and Current Inputs
Make sure that the voltages and currents that are input to the Units and
slaves are within the specified ranges.
Inputting voltages or currents that are outside of the specified ranges may
cause accidents or fire.
Downloading
Always confirm safety at the destination before you transfer a user program,
configuration data, setup data, device variable s, or values in memory used
for CJ-series Units from the Sysmac Studio. The devices or machines may
perform unexpected operation regardless of the operating mode of the CPU
Unit.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
21
Safety Precautions
Application
Do not touch any Unit when power is being supplied or immediately after the
power supply is turned OFF. Doing so may result in burn injury.
Wiring
Be sure that all terminal screws and cable connector screws are tightened to
the torque specified in the relevant manuals. The loose screws may result in
fire or malfunction.
Caution
Online Editing
Execute online editing only after confirming that no adverse effects will be
caused by deviations in the timing of I/O. If you perform online editing, the
task execution time may exceed the task period, I/O may not be refreshed
with external devices, input signals may not be read, and output timing may
change.
22
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Precautions for Safe Use
Disassembly and Dropping
• Do not attempt to disassemble, repair, or modify any Units. Doing so may result in malfunction or fire.
• Do not drop any Unit or subject it to abno rmal vibration or shoc k. Doing so ma y r esult in Unit malfunction or burning.
Mounting
• The sliders on the tops and bottoms of the Power Supply Unit, CPU Unit, I/O Units, and other Units
must be completely locked (until they clic k into place) after connecting the adjacent Unit connectors.
Installation
Precautions for Safe Use
• Always conn ect to a ground of 100 Ω or less when installing the Units. A g round of 100 Ω or less must
be installed when shorting the GR and LG terminals on the Power Su pply Unit.
Wiring
• Follow the instructions in this manual to correctly perform wiring.
Double-check all wiring and switch settings before turning ON the power supply.
• Use crimp terminals for wiring.
Do not connect bare stranded wires directly to terminals.
• Do not pull on the cables or bend the cables beyond their natural limit.
Do not place heavy objects on top of the cables or other wiring lines. Doing so may break the cables.
• Mount terminal blocks and connectors only after checking the mou nting location carefully.
• Be sure that the terminal blocks, expansion cables, and other items with locking devices are properly
locked into place.
• Always remove any dustproof labels that are on the top of the Units when they are shipped before
you turn ON the power supply. If the labels are not removed, heat will accumulate and malfunctions
may occur.
• Before you connect a computer to the CPU Unit, disconnect the power supply plug of the computer
from the AC outlet. Also, if the computer has an FG terminal, make the connections so that the FG
terminal has the same electrical potential as the GR terminal on the Power Supply Unit. A difference
in electric potential between the computer and Controller may cause failure or malfunction.
• If the external power sup ply to an O utput Un it or sla ve has polarity, connect it with the corr ect pola rity.
If the polarity is reversed, current may flow in the reverse direction and damage the connected
devices regardless of the operation of the Controller.
Power Supply Design
• Do not exceed the rated supply capacity of the Power Supply Units in the NJ-series Controller. The
rated supply capacities are given in the NJ-series CPU Unit Hardware User's Manual
(Cat. No. W500).
If the capacity is exceeded, operation may stop, malfunctions may occur, or data may not be backed
up normally for power interruptions.
Use NJ-series Power Supply Units for both the NJ-series CPU Rack and Expansion Racks.
Operation is not possible if a CJ-series Power Supply Unit is used with an NJ-series CPU Unit or an
NJ-series Power Supply Unit is used with a CJ-series CPU Unit.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
23
Precautions for Safe Use
• Do not apply voltages or connect loads to the Output Units or slaves in excess of the maximum ratings.
• Surge current occurs when the power supply is turned ON. When selecting fuses or breakers for
external circuits, consider the above precaution and allow sufficient margin in shut-off performance.
Refer to the relevant manuals for surge current specifications. Refer to the NJ-series CPU Unit Hard-
ware User 's Manual (Cat. No. W500) for surge current specifications.
• If the full dielectric strength voltage is applied or turned OFF using the s witch on the tester, the generated impulse voltage may damage the Power Supply Un it. Use the a djustmen t on the t est er t o gradually increase and decrease the voltage.
• Apply the voltage between the Power Supply Unit's L1 or L2 terminal and the GR terminal when testing insulation and dielectric strength.
• Do not supply AC power from an inverter or other device with a square-wave output. Int ernal temperature rise may result in smoking or burning. Always input a sinusoidal wave with the frequency that is
given in the NJ-series CPU Unit Hardware User's Manual (Cat. No. W500).
• Install external breakers and take other safety measures against short-circuiting in external wiring.
Turning ON the Power Supply
• It takes up to approximately 10 to 20 s to enter RUN mode after the power is turned ON. During that
time, outputs will be OFF or will be the values specified in the Unit or slave settings, and external
communications cannot be perf ormed. Use the R UN output on t he Power Supply Unit, for example , to
implement fail-safe circuits so that external devices do not operate incorrectly.
• Configure the external circuits so that the power supply to the control system turns ON only after the
power supply to the Cont roller h as turned ON. If the power supply to the Controll er is t urned ON after
the control power supply , temporary errors may result in incorrect control system signals because the
output terminals on Ou tput Units may momentarily turn ON when power supply is turned ON to the
Controller.
• If you transfer data from a backup file on an SD Memory Card to the Controller when the power supply is turned ON, proper ly select the da ta groups to transfer. If the data for an unintended data group
is transferred to the Controller, it may cause the equipment to operate unpredictably.
Actual Operation
• Check the user program, data, and parameter settings for proper execution before you use them for
actual operation.
Turning OFF the Power Supply
• Never turn OFF the power supply to the Controller whe n the BUSY indicator is flashing. While the
BUSY indicator is lit, the user program and settings in the CPU Unit are being backed up in the builtin non-volatile memory. This data will not be backed up correctly if the power supply is turned OFF.
Also, a major fault level Controller error will occur the next time you start operation, and operation will
stop.
• Do not turn OFF the power supply or remo ve the SD Memory Card while SD Memory Card access is
in progress (i.e., while the SD BUSY indicator flashes). Data ma y become corrupted, and the Controller will not operate correctly if it uses corrupted data. To remove the SD Memory Card from the CPU
Unit while the power supply is ON, press the SD Memory Card power supply switch and wait for the
SD BUSY indicator to turn OFF before you remove the SD Memory Card.
• Do not disconnect the cable or turn OFF the power supply to the Controller when downloading data
or the user program from Support Software.
• Always turn OFF the power supply to the Controller before you attempt any of the following.
• Mounting or removing I/O Units or the CPU Unit
• Assembling the Units
• Setting DIP switches or rotary switches
24
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Precautions for Safe Use
• Connecting cables or wiring the system
• Connecting or disconnecting the connectors
The Power Supply Unit may continue to supply power to the rest of the Controller for a few seconds
after the power supply turns OFF. The PWR indicator is lit during this time. Confirm that the PWR
indicator is not lit before you perform any of the above.
Operation
• Confirm that no adverse effect will occur in the system before you attempt any of the following.
• Changing the operating mode of the CPU Unit (including changing the setting of the Operating
Mode at Startup)
• Changing the user program or settings
• Changing set values or present values
• Forced refreshing
• Always sufficiently check the safety at the connected devices before you change the settings of an
EtherCAT slave or Special Unit.
• If two different function modules are used together, such as when you use CJ-series Basic Output
Units and EtherCAT slave outputs, take suitable measures in the user program and external controls
to ensure that safety is maintained in the controlled system if on e of the fu nctio n mod ules stop s. The
relevant outputs will stop if a partial fault level error occurs in one of the function modules.
• Always confirm safety at the connected equipment before you reset Controller errors with an event
level of partial fault or higher for the EtherCAT Master Function Module.
When the error is reset, all slaves that were in any state other than Operational state due to a Controller error with an event le vel of partial fault or higher (in which outputs are disabled) will go to Operational state and the outputs will be enabled.
Before you reset all errors, confirm that no Controller errors with an event level of partial fault have
occurred for the EtherCAT Master Function Module.
• Always confirm safety at the connected equipment before you reset Controller errors for a CJ-series
Special Unit. When a Controller error is reset, the Unit where the Controller error with an event level
of observation or higher will be restarted.
Before you reset all errors, confirm that no Controller errors with an event level of observation or
higher have occurred for the CJ-series Special Unit. Observation level events do not appear on the
Controller Error Tab Page, so it is possible that you may restart the CJ-series Special Unit without
intending to do so.
You can check the status of the _CJB_UnitErrSta[0,0] to _CJB_UnitErrSta[3,9] error status variables
on a Watch Tab Page to see if an observation level Controller error has occurred.
Battery Backup
• The user program and initial values for the variables are stored in non-volatile memory in the CPU
Unit. The present values of variables with the Retain attribute and the values of the Holding, DM, and
EM Areas in the memory used for CJ-series Units are backed up by a Battery. If the Battery is not
connected or the Batter y is exhausted, the CPU Un it dete cts a Ba ttery-backup Memor y Check Error.
If that error is detected, variables with a Retain attribute are set to their initial values and the Holding,
DM, and EM Areas in memory used for CJ-series Units are cleared to all zeros. Perform thorough
verifications and provide sufficient measures to ensure that the devices perform safe operation for the
initial values of the variables with Retain attributes and the resulting operation.
Debugging
• Forced refreshing ignores the results of user program execution and refreshes I/O with the specified
values. If forced refreshing is used for inputs for which I/O refreshing is not supported, the inputs will
first take the specified values, but they will then be overwritten by the user program. This operation
differs from the force-set/reset functionality of the CJ-series PLCs.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
25
Precautions for Safe Use
• You cannot upload or download information for forced refreshing with the Sysmac Studio.
After downloading data that contains forced refreshing, change to RUN mode and then use the Sysmac Studio to perform the operation for forced refreshing.
Depending on the difference in the forced status, the control system may operate unexpectedly.
• Do not specify the same address for the AT specification for more than one variab le.
Doing so would allow the same entity to be accessed with different variable names, which would
make the user program more difficult to understand and possibly cause programming mistakes.
General Communications
• When you use data link communications, check the error information that is given in ErrSta (Controller Error Status) to make sure that no error has occu rred in the source de vice . Write the user progr am
to use the received data only if there is no error. If there is an error in the source device, the data for
the data link may contain incorrect values.
• Unexpected operat ion may result if inappropriate data link tables are set. Even if appro priate data link
tables have been set, confirm that the controlled system will not be adversely affected before you
transfer the data link tables. The data links start automatically after the data link tables are transferred.
• All CPU Bus Units are restarted when routing tables are transferred from Support Software to the
CPU Unit. Confirm that the system will not be adversely affected by restarting before you transfer the
routing tables.
• Tag data links will stop between related nodes while tag data link parameters are transferred during
Controller operation. Confirm that the system will not be adversely affected before you transfer the
tag data link parameters.
EtherNet/IP Communications
• All related EtherNet/IP nodes are reset when you transfer settings for the built-in EtherNet/IP port
(including IP addresses and tag data links settings). Confirm that the system will not be adversely
affected by resetting nodes before you transfer the settings.
• If EtherNet/IP tag data links (cyclic communications) are used with a repeating hub, the communications load on the network will increase. This will increase collisions and may prevent stab le comm unications. Do not use repeating hubs on networks where tag data links are used. Use an Ethernet
switch instead.
EtherCAT Communications
• Make sure that the comm unications distance , n umber of nod es connected, and met hod of connect ion
for EtherCAT are within specifications.
Do not connect EtherCAT communications to EtherNet/IP, a standard in-house LAN, or other networks. An overload may cause the network to fail or malfunction.
• Malfunctions or unexpected operation may occur for some combinations of EtherCAT revisions of the
master and slaves . If y ou disab le the revision check in the network settings, use the Sysmac Studio to
check the slave revision settings in the master and the actual slave revisions, and then make sure
that functionality is compatible in the slave manuals or other references. You can check the actual
slave revisions from the Sysmac Studio or on slave nameplates.
• After you transfer the user program, the CPU Unit is restarted and communications with the EtherCAT slaves are cut off. During that period, the slave outputs behave according to the slave settings.
The time that communications are cut off depends on the EtherCAT network configuration. If the
EtherCAT network configuration contains only OMRON EtherCAT slaves, communications are cut off
for a maximum of 45 seconds.
Before you transfer the user program, confirm that the system will not be adversely affected.
26
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Precautions for Safe Use
• If the Fail-soft Operation parameter is set to stop operation, process data communications will stop
for all slav es when an EtherCAT communications error is detected in a slave. For this reason, if Servo
Drives are connected, the Servos for all axes will be turned OFF. Make sure that the Fail-soft Operation parameter setting results in safe operation when a device error occurs.
• EtherCAT communications are not always established immediately after the power supply is turned
ON. Use the system-defined variables in t he user prog ra m to confirm that communication s are established before attempting control operations.
• If frames sent to EtherCAT slaves are lost due to noise or other causes, slave I/O data is not communicated, and the intended operation is sometimes not achieved. If noise countermeasures are
required, use the _EC_InDataInvalid (Input Data Disable) system-defined variable as an interlock
condition in the user program.
Refer to the NJ-series CPU Unit Built-in EtherCAT Port User's Manual (Cat. No. W505) for details.
The slave outputs behave according to the slave settings. Refer to the manuals for the slaves for
details.
• When an EtherCAT slave is disconnected, communications will stop and control of the outputs will be
lost not only for the disconnected slave, but for all slaves connected after it. Confirm that the system
will not be adversely affected before you disconnect a slave.
• If you disconnect the cable from an EtherCAT slave to disconnect it from the network, any current
communications frames may be lost. If frames are lost, slave I/O data is not communicated, and the
intended operation is sometimes not achieved. Perform the following processing for a slave that
needs to be replaced.
Program the _EC_InDataInvalid (Input Data Disable) system-defined variable as an interlock con-
dition.
Set the Impermissible Number of Continuous Timeouts setting in the EtherCAT master to at least
2.
Refer to the NJ-series CPU Unit Built-in EtherCAT Port User's Manual (Cat. No. W505) for details.
Motion Control
• Confirm the axis number carefully before you perform an MC Test Run.
• The motor is stopped if communications are interrupted between the Sysmac Studio and the CPU
Unit during an MC Test Run. Connect the communications cable between the computer and CPU
Unit securely and confirm that the system will not be adversely affected before you perform an MC
Test Run.
• Always execute the Save Cam Table instruction if you change an y of the cam data from the user program in the CPU Unit or from the Sysmac Studio. If the cam data is not saved, the previous condition
will be restored when the power is turned ON again, possibly causing unexpected machine operation.
• The positive drive prohibit input (POT), negative dr ive prohibit input (NOT), and home proximity input
(DEC) of the Servo Drive are used by the MC Function Module as the positive limit input, negative
limit input, and home proximity in put. Mak e sure that the signal widt hs f or all of these input signals are
longer than the control period of the MC Function Module. If the input signal widths are shorter than
the control period, the MC Function Module may not be able to detect the input signals, resulting in
incorrect operation.
Battery Replacement
• The Battery may leak, rupture, heat, or ign ite. Ne v er short-circuit, charge, disassemb le , heat, or incinerate the Battery or subject it to strong shock.
• Dispose of any Battery that has been dropped on the floor or other wise subjected to excessive shock.
Batteries that have been subjected to shock may leak if they are used.
• UL standards require that only an experienced engineer replace the Battery. Make sure that an experienced engineer is in charge of Battery replacement.
• Apply power for at least five minutes before changing the Batter y. Install a new Battery within five
minutes (at 25°C) of turning OFF the power supply. If power is not supplied for at least 5 minutes, the
saved data may be lost.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
27
Precautions for Safe Use
Unit Replacement
• We recommend replacing the Battery with the power turned OFF to prevent the CPU Unit's sensitive
internal components from being damaged by static electricity and to prevent malfunctions. The Battery can be replaced without turning OFF the power supply. To do so, always touch a grounded piece
of metal to discharge static electricity from your body before yo u start the procedure.
After you replace the Battery, connect the Sysmac Studio and clear the Low Battery Voltage error.
• Make sure that the required data, including the user program, configurations, settings, variables, and
memory used for CJ-series Units, is transferred to a CPU Unit that was replaced and to externally
connected devices before restarting operation.
Be sure to include the routing tables, network parameters, and other CPU Bus Unit data, which are
stored in the CPU Unit.
Disposal
• Dispose of the product and Batteries according to local ordinances as they apply.
• The following information must be display ed for all products that contain primary lithium batteries with
a perchlorate content of 6 ppb or higher when shipped to or transported through the State of California, USA.
Perchlorate Material - special handling may apply.
See www.dtsc.ca.gov/hazardouswaste/perchlorate.
• The CPU Unit contains a primary lithium battery with a perchlorate content of 6 ppb or higher. Place
the above information on the individual boxes and shipping boxes when shipping finished products
that contain a CPU Unit to the State of California, USA.
Using Serial Communications Unit
• When connecting RS-422A/485, always check the polarity before you make connections. The signal
names SDA/B and RDA/B do not always have the same polarity.
• Do not turn OFF the power supply while writing the protocol macro data.
• Do not connect the 5-V power supply on pin 6 of the RS-232C port on the Unit to any external de vice
other than an NT-AL001 Link Adapter. Otherwise, the e xternal de vice and the Se rial Communication s
Unit may be damaged.
• Use the OMRON Cables specified in this manual or make your own cables. Do not use commercially
available RS-232C cables sold for personal computers. Otherwise, the external device and the Serial
Communications Unit may be damaged .
• When the Serial Gateway is executed during protocol macro execution, the communications
sequence contents and the command reception timing may suspend step transition of the communications. Use the Serial Gateway send start timeout function to monitor at the command source
whether step transition in the com munications sequence was suspended due to execution of Serial
Gateway. If sending of he command of each protocol does not start within the set time, either retry
execution of the command or change the communications sequence.
• When you use 2-wire RS-422A/485 communications in Protocol Macro Mode, set only modem controls for the transmission control parameters, and do not use RS/CS flow controls.
• An instruction error will occur if you execute the SerialSend, SerialRcv, or Ser ialRcvNoClear instr uction for a serial communications port that is in any mode other than No-protocol Mode.
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CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
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