Omron NX-ID3317, NX-ID4342, NX-ID3443, NX-ID3444, NX-ID4442 User Manual

Machine Automation Controller

NX-series

Digital I/O Units

User’s Manual

NX-ID
NX-IA
NX-OC
NX-OD
NX-MD

Digital I/O Units

W521-E1-04

© OMRON, 2013

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.

Trademarks

• Sysmac and SYSMAC are trademarks or registered trademarks of OMRON Corporation in Japan and other
countries for OMRON factory automation products.

• Windows, Windows 98, Windows XP, Windows Vista, and Windows 7 are registered trademarks of Microsoft
Corporation in the USA and other countries.

• EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH, Germany.

• Safety over EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation
GmbH, Germany.

• ODVA, CIP, CompoNet, DeviceNet, and EtherNet/IP are trademarks of ODVA.

• The SD and SDHC logos are trademarks of SD-3C, LLC.

Other company names and product names in this document are the trademarks or registered trademarks of their
respective companies.

Introduction

Thank you for purchasing an NX-series Digital I/O Unit.

This manual contains information that is necessary to use the NX-series Digital I/O Unit. Please read
this manual and make sure you understand the functionality and performance of the NX-series Digital
I/O 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 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 B 3503.

Introduction

Applicable Products

This manual covers the following product.

• NX-series Digital I/O Unit

NX-ID /IA /OD/OC/MD

NX-series Digital I/O Unit User’s Manual (W521)

1

CONTENTS

CONTENTS

Introduction ..............................................................................................................1

Intended Audience....................................................................................................................................... 1

Applicable Products..................................................................................................................................... 1

Relevant Manuals .....................................................................................................6

Manual Structure ......................................................................................................7

Page Structure and Icons ............................................................................................................................ 7

Special Information...................................................................................................................................... 8

Precaution on Terminology .......................................................................................................................... 8

Terms and Conditions Agreement ..........................................................................9

Warranty, Limitations of Liability .................................................................................................................. 9

Application Considerations ........................................................................................................................ 10

Disclaimers ................................................................................................................................................ 10

Safety Precautions ................................................................................................. 11

Definition of Precautionary Information...................................................................................................... 11

Symbols..................................................................................................................................................... 11

Warnings.................................................................................................................................................... 12

Cautions..................................................................................................................................................... 13

Precautions for Safe Use....................................................................................... 15

Precautions for Correct Use.................................................................................. 19

Regulations and Standards................................................................................... 20

Conformance to EC Directives .................................................................................................................. 20

Conformance to UL and CSA Standards................................................................................................... 21

Conformance to Shipbuilding Standards ................................................................................................... 21

Conformance to KC Standards.................................................................................................................. 21

Software Licenses and Copyrights ............................................................................................................ 21

Unit Versions ..........................................................................................................22

Unit Versions.............................................................................................................................................. 22

Unit Versions and Sysmac Studio Versions............................................................................................... 24

Related Manuals .....................................................................................................25

Terminology ............................................................................................................28

Revision History .....................................................................................................30

Sections in this Manual .........................................................................................31

Section 1 Features and System Configuration

1-1 Features and Types of Digital I/O Units ............................................................................... 1-2

1-1-1 Digital I/O Unit Features.............................................................................................................. 1-2

1-1-2 Digital I/O Unit Types ..................................................................................................................1-3

1-2 System Configuration of Slave Terminals........................................................................... 1-4

1-2-1 Overview ..................................................................................................................................... 1-4

1-2-2 System Configuration..................................................................................................................1-4

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NX-series Digital I/O Unit User’s Manual (W521)

1-3 Model List............................................................................................................................... 1-6

1-3-1 Model Notation............................................................................................................................ 1-6

1-3-2 Digital Input Units........................................................................................................................ 1-9

1-3-3 Digital Output Units....................................................................................................................1-11

1-3-4 Digital Mixed I/O Units .............................................................................................................. 1-13

1-4 List of Functions.................................................................................................................. 1-14

1-4-1 Digital Input Units...................................................................................................................... 1-14

1-4-2 Digital Output Units................................................................................................................... 1-15

1-4-3 Digital Mixed I/O Units .............................................................................................................. 1-16

1-5 Support Software................................................................................................................. 1-17

Section 2 Specifications

2-1 General Specifications.......................................................................................................... 2-2

2-2 Individual Specifications ...................................................................................................... 2-3

Section 3 Part Names and Functions

CONTENTS

3-1 Part Names............................................................................................................................. 3-2

3-1-1 Screwless Clamping Terminal Block Type.................................................................................. 3-2

3-1-2 Connector Types......................................................................................................................... 3-6

3-2 Indicators ............................................................................................................................... 3-9

3-2-1 TS Indicator ...............................................................................................................................3-11

3-2-2 IN/OUT Indicator....................................................................................................................... 3-12

Section 4 Installation and Wiring

4-1 Installing NX Units................................................................................................................ 4-2

4-1-1 Installing NX Units ...................................................................................................................... 4-2

4-1-2 Attaching Markers....................................................................................................................... 4-4

4-1-3 Removing NX Units .................................................................................................................... 4-5

4-1-4 Installation Orientation................................................................................................................ 4-7

4-2 Wiring the Power Supply to the Slave Terminal ................................................................. 4-8

4-2-1 Power Supply Types................................................................................................................... 4-8

4-2-2 Supplying Each Power Supply and Wiring ................................................................................. 4-9

4-2-3 Calculating the Total Current Consumption from I/O Power Supply ..........................................4-11

4-2-4 Power Supply-related Units for the NX-series .......................................................................... 4-12

4-3 Wiring the Terminals ........................................................................................................... 4-15

4-3-1 Wiring to the Screwless Clamping Terminal Block.................................................................... 4-15

4-3-2 Wiring to Connectors ................................................................................................................ 4-32

4-3-3 Checking the Wiring.................................................................................................................. 4-34

4-4 Wiring Examples.................................................................................................................. 4-35

4-4-1 Wiring the Input Units ............................................................................................................... 4-35

4-4-2 Precautions when Wiring to the Output Units ........................................................................... 4-47

Section 5 I/O Refreshing

5-1 I/O Refreshing for Slave Terminals ...................................................................................... 5-2

5-1-1 I/O Refreshing from CPU Unit to Slave Terminal........................................................................ 5-2

5-2 I/O Refreshing Methods ........................................................................................................ 5-3

5-2-1 Types of I/O Refreshing Methods ............................................................................................... 5-3

5-2-2 Setting the I/O Refreshing Methods............................................................................................ 5-4

NX-series Digital I/O Unit User’s Manual (W521)

3

CONTENTS

5-2-3 Selecting NX Units ......................................................................................................................5-4

5-2-4 Free-Run Refreshing...................................................................................................................5-5

5-2-5 Synchronous Input Refreshing....................................................................................................5-9

5-2-6 Synchronous Output Refreshing...............................................................................................5-13

5-2-7 Time Stamp Refreshing.............................................................................................................5-18

5-2-8 Input Refreshing with Input Changed Time............................................................................... 5-19

5-2-9 Output Refreshing with Specified Time Stamp ..........................................................................5-24

5-2-10 An Example of Turning ON Outputs at Specific Times After the Sensor Inputs Change ..........5-29

Section 6 Digital Input Units

6-1 Types of Digital Input Units................................................................................................... 6-2

6-2 Specifications of I/O Data ..................................................................................................... 6-4

6-2-1 Allocable I/O Data ....................................................................................................................... 6-4

6-3 List of Settings....................................................................................................................... 6-7

6-4 Function ............................................................................................................................... 6-13

6-4-1 List of Digital Input Unit Functions............................................................................................. 6-13

6-4-2 Input Filter .................................................................................................................................6-14

Section 7 Digital Output Units

7-1 Types of Digital Output Units................................................................................................7-2

7-2 Specifications of I/O Data ..................................................................................................... 7-4

7-2-1 Allocable I/O Data ....................................................................................................................... 7-4

7-3 List of Settings....................................................................................................................... 7-8

7-4 Function ............................................................................................................................... 7-11

7-4-1 List of Digital Output Unit Functions.......................................................................................... 7-11

7-4-2 Load Rejection Output Setting ..................................................................................................7-12

7-4-3 Load Short-circuit Protection.....................................................................................................7-18

7-5 Push-pull Output ................................................................................................................. 7-20

7-6 Precautions when Using the Relay Output Units ............................................................. 7-21

Section 8 Digital Mixed I/O Units

8-1 Types of Digital Mixed I/O Units ........................................................................................... 8-2

8-2 Specifications of I/O Data ..................................................................................................... 8-3

8-2-1 Allocable I/O Data ....................................................................................................................... 8-3

8-3 List of Settings....................................................................................................................... 8-5

8-3-1 Input Settings ..............................................................................................................................8-5

8-3-2 Output Settings ........................................................................................................................... 8-6

8-4 Function ................................................................................................................................. 8-7

8-4-1 List of Input Functions................................................................................................................. 8-7

8-4-2 Output Functions.........................................................................................................................8-7

Section 9 Troubleshooting

9-1 How to Check for Errors ....................................................................................................... 9-2

9-2 Checking for Errors with the Indicators .............................................................................. 9-3

9-3 Checking for Errors and Troubleshooting on the Sysmac Studio.................................... 9-5

9-3-1 Checking for Errors from the Sysmac Studio .............................................................................. 9-5

4

NX-series Digital I/O Unit User’s Manual (W521)

9-3-2 Event Codes and Corrections for Errors.....................................................................................9-7

9-3-3 Meaning of Error......................................................................................................................... 9-9

9-4 Resetting Errors .................................................................................................................. 9-16

9-5 Troubles Specific To Each Type of NX Units..................................................................... 9-17

9-5-1 Digital Inputs............................................................................................................................. 9-17

9-5-2 Digital Outputs .......................................................................................................................... 9-18

9-6 Troubleshooting Flowchart ................................................................................................ 9-19

Section 10 Inspection and Maintenance

10-1 Cleaning and Inspection .....................................................................................................10-2

10-1-1 Cleaning.................................................................................................................................... 10-2

10-1-2 Periodic Inspection ................................................................................................................... 10-2

10-2 Maintenance Procedures .................................................................................................... 10-5

Appendices

CONTENTS

A-1 Data Sheet ..............................................................................................................................A-2

A-1-1 Model List ................................................................................................................................... A-2

A-1-2 Digital Input Units........................................................................................................................ A-5

A-1-3 Digital Output Units...................................................................................................................A-24

A-1-4 Digital Mixed I/O Units .............................................................................................................. A-49

A-2 Dimensions ..........................................................................................................................A-59

A-2-1 Screwless Clamping Terminal Block Type................................................................................A-59

A-2-2 Connector Types....................................................................................................................... A-61

A-3 Connecting Connector-Terminal Block Conversion Units and I/O Relay Terminals .....A-63

A-3-1 Patterns for Combining Connector-Terminal Block Conversion Units and I/O Relay Terminals

..................................................................................................................................................A-63

A-3-2 Combinations of Connections................................................................................................... A-65

A-3-3 Connector-Terminal Block Conversion Unit Connection Diagrams ..........................................A-68

A-3-4 Connection Diagrams for I/O Relay Terminals..........................................................................A-74

A-4 EMC Directive Measures for Relay Outputs......................................................................A-80

A-5 List of NX Objects................................................................................................................A-81

A-5-1 Format of Object Descriptions .................................................................................................. A-81

A-5-2 Digital Input Units...................................................................................................................... A-82

A-5-3 Digital Output Units...................................................................................................................A-90

A-5-4 Digital Mixed I/O Units .............................................................................................................. A-99

A-6 List of Screwless Clamping Terminal Block Models......................................................A-104

A-6-1 Model Notation........................................................................................................................ A-104

A-6-2 List of Terminal Block Models .................................................................................................A-104

A-7 Version Information...........................................................................................................A-105

A-7-1 Relationship between Unit Versions of NX Units, Communications Coupler Units and CPU Units,

and Versions of Sysmac Studio ..............................................................................................A-105

Index

NX-series Digital I/O Unit User’s Manual (W521)

5

Relevant Manuals

Relevant Manuals

The table below provides the relevant manuals for the NX-series Digital I/O Units.

Read all of the manuals that are relevant to your system configuration and application to make the most
of the NX-series Digital I/O Units.

Other manuals, such as related product manuals, are necessary for specific system configurations and
applications. Refer to Related Manuals on page 25 for the related manuals.

Manual name Application

NX-series Digital I/O Units User's
Manual

NX-series Data Reference Man­ual

Learning how to use NX-series Digital I/O Units

Referencing lists of the data that is required to configure systems with
NX-series Units

6

NX-series Digital I/O Unit User’s Manual (W521)

Manual Structure

4-9

4 Installation and Wiring

NJ-series CPU Unit Hardware User’s Manual (W500)

stinU gnitnuoM 3-4

4

stnenopmoC rellortnoC gnitcennoC 1-3-4

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.

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

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.

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 click into place) after connecting
the adjacent Unit connectors.

Page Structure and Icons

The following page structure and icons are used in this manual.

Manual Structure

Note This illustration is provided only as a sample. It may not literally appear in this manual.

NX-series Digital I/O Unit User’s Manual (W521)

7

Manual Structure

Precautions for Safe Use

Precautions for Correct Use

Additional Information

Version Information

Special Information

Special information in this manual is classified as follows:

Precautions on what to do and what not to do to ensure safe usage of the product.

Precautions on what to do and what not to do to ensure proper operation and performance.

Additional information to read as required.

This information is provided to increase understanding or make operation easier.

Information on differences in specifications and functionality for CPU Units and Communica­tions Coupler 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, “synchro­nize” means to automatically compare the data for the Sysmac Studio on the computer with the data
in the physical Controller and transfer the data in the direction that is specified by the user.

• In this manual, the directions in relation to the Units are given in the following figure, which shows
upright installation.

Up

8

RightLeft

Down

NX-series Digital I/O Unit User’s Manual (W521)

Terms and Conditions Agreement

Terms and Conditions Agreement

Warranty, Limitations of Liability

Warranties

 Exclusive Warranty

Omron’s exclusive warranty is that the Products will be free from defects in materials and workman­ship for a period of twelve months from the date of sale by Omron (or such other period expressed in
writing by Omron). Omron disclaims all other warranties, express or implied.

 Limitations

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF
THE PRODUCTS. BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.

Omron further disclaims all warranties and responsibility of any type for claims or expenses based
on infringement by the Products or otherwise of any intellectual property right.

 Buyer Remedy

Omron’s sole obligation hereunder shall be, at Omron’s election, to (i) replace (in the form originally
shipped with Buyer responsible for labor charges for removal or replacement thereof) the non-com­plying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount equal
to the purchase price of the non-complying Product; provided that in no event shall Omron be
responsible for warranty, repair, indemnity or any other claims or expenses 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. Return of
any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies
shall not be liable for the suitability or unsuitability or the results from the use of Products in combi­nation with any electrical or electronic components, circuits, system assemblies or any other materi­als or substances or environments. Any advice, recommendations or information given orally or in
writing, are not to be construed as an amendment or addition to the above warranty.

See http://www.omron.com/global/ or contact your Omron representative for published information.

Limitation on Liability; Etc

OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CON­SEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY
WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED IN CONTRACT,
WARRANTY, NEGLIGENCE OR STRICT LIABILITY.

Further, in no event shall liability of Omron Companies exceed the individual price of the Product on
which liability is asserted.

NX-series Digital I/O Unit User’s Manual (W521)

9

Terms and Conditions Agreement

Application Considerations

Suitability of Use

Omron Companies shall not be responsible for conformity with any standards, codes or regulations
which apply to the combination of the Product in the Buyer’s application or use of the Product. At
Buyer’s request, Omron will provide applicable third party certification documents identifying ratings
and limitations of use which apply to the Product. This information by itself is not sufficient for a com­plete determination of the suitability of the Product in combination with the end product, machine, sys­tem, or other application or use. Buyer shall be solely responsible for determining appropriateness of
the particular Product with respect to Buyer’s application, product or system. Buyer shall take applica­tion responsibility in all cases.

NEVER USE THE PRODUCT 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 PRODUCT(S) IS PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

Programmable Products

Omron Companies shall not be responsible for the user’s programming of a programmable Product, or
any consequence thereof.

Disclaimers

Performance Data

Data presented in Omron Company websites, catalogs and other materials 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 user must correlate it to actual application requirements. Actual perfor­mance is subject to the Omron’s Warranty and Limitations of Liability.

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 part numbers when published ratings or features are changed, or
when significant construction changes are made. However, some specifications of the Product may be
changed without any notice. When in doubt, special part numbers may be assigned to fix or establish
key specifications for your application. Please consult with your Omron’s representative at any time to
confirm actual specifications of purchased Product.

10

Errors and Omissions

Information presented by Omron Companies has been checked and is believed to be accurate; how­ever, no responsibility is assumed for clerical, typographical or proofreading errors or omissions.

NX-series Digital I/O Unit User’s Manual (W521)

Safety Precautions

WARNING

Caution

Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. Additionally, there may be
severe property damage.

Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury, or property damage.

Definition of Precautionary Information

The following notation is used in this manual to provide precautions required to ensure safe usage of an
NX-series Digital I/O 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.

Safety Precautions

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.

NX-series Digital I/O Unit User’s Manual (W521)

11

Safety Precautions

WARNING

Warnings

During Power Supply

Do not touch the terminal section while power is ON.

Electric shock may occur.

Do not attempt to take any Unit apart.

In particular, high-voltage parts are present in Units that supply power 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.

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 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 a power supply error occurs.

• If the power supply connection becomes faulty.

• If a CPU watchdog timer error or CPU reset occurs.

• If a Controller error in the major fault level 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.

The 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.

If external power supplies for slaves or other devices are overloaded or short-circuited, the
voltage will drop, outputs will turn OFF, and the system may be unable to read inputs. Pro­vide external safety measures in control with monitoring of external power supply voltage
as required so that the system operates safely in such a case.

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.

12

NX-series Digital I/O Unit User’s Manual (W521)

Voltage and Current Inputs

Caution

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.

Transferring

Always confirm safety at the destination node before you transfer Unit configuration infor­mation, parameters, settings, or other data from tools such as the Sysmac Studio.

The devices or machines may operate unexpectedly, regardless of the operating mode of
the Controller.

Cautions

Safety Precautions

Wiring

When you connect a computer or other peripheral device to a Communications Coupler
Unit that has a non-isolated DC power supply, either ground the 0-V side of the external
power supply (i.e. Unit power supply) or do not ground it at all.

If the peripheral devices are grounded incorrectly, the external power supply (i.e. Unit
power supply) may be short-circuited.

Never ground the 24-V side of the power supply, as shown in the following figure.

NX Unit power
supply

0 V

Peripheral device

(e.g., computer)

Communications Coupler Unit

Non-isolated DC power

supply (internal power

supply circuit)

Peripheral device

cable

24 V

NX-series Digital I/O Unit User’s Manual (W521)

Ground terminal

Unit power
supply

13

Safety Precautions

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.

14

NX-series Digital I/O Unit User’s Manual (W521)

Precautions for Safe Use

Up

Down

Transporting

• When transporting any Unit, use the special packing box for it.
Also, do not subject the Unit to excessive vibration or shock during transportation.

• Do not drop any Unit or subject it to abnormal vibration or shock.
Doing so may result in Unit malfunction or burning.

Mounting

• Mount terminal blocks and connectors only after checking the mounting location carefully.

• Be sure that the terminal blocks, expansion cables, and other items with locking devices are properly
locked into place.

Precautions for Safe Use

Installation

• Do not apply labels or tape to the Unit. When the Unit is installed or removed, adhesive or scraps
may adhere to the pins in the NX bus connector, which may result in malfunctions.

• Do not write on the Communications Coupler Unit or an NX Unit with ink within the restricted region
that is shown in the following figure. Also do not get this area dirty. When the Unit is installed or
removed, ink or dirt may adhere to the pins in the NX bus connector, which may result in malfunctions
in the Slave Terminal.

Restricted

region (shaded

portion)

Communications Coupler

Unit or NX Unit

• For the installation orientations in the following figure, support the cables, e.g., with a duct, so that the
End Plate on the bottom is not subjected to the weight of the cables. The weight of the cables may
cause the bottom End Plate to slide downward so that the Slave Terminal is no longer secured to the
DIN Track, which may result in malfunctions.

NX Unit

NX-series Digital I/O Unit User’s Manual (W521)

15

Precautions for Safe Use

NG NG

Wiring

• Double-check all switches and other settings and double-check all wiring to make sure that they are
correct before turning ON the power supply.
Use the correct wiring parts and tools when you wire the system.

• Do not pull on the cables or bend the cables beyond their natural limit. Also, do not place heavy
objects on top of the cables or other wiring lines. Doing so may break the cable.

• When wiring or installing the Units, do not allow metal fragments to enter the Units.

• Do not press the flat-blade screwdriver straight into the release holes on a screwless clamping termi­nal block. Doing so may damage the terminal block.

NG OK

• When you insert a flat-blade screwdriver into a release hole on a screwless clamping terminal block,
press it down with a force of 30N or less. Applying excessive force may damage the terminal block.

• Do not incline or twist the flat-blade screwdriver while it is in a release hole on a screwless clamping
terminal block. Doing so may damage the terminal block.

• If you use reed switches for the input contacts for AC Input Units, use switches with an allowable cur­rent of 1 A or greater. If the capacity of the reed switches is too low, inrush current may fuse the con­tacts.

Power Supply Design

• Use all Units within the I/O power supply ranges that are given in the specifications.

• Supply sufficient power according to the contents of this manual.

• Use the power supply voltage that is specified in this manual.

• Do not apply voltages that exceed the rated value to any Input Unit.

• Do not apply voltages or connect loads to the Output Units or slaves in excess of the maximum rat­ings.

• Inrush current occurs when the power supply is turned ON. When selecting fuses or breakers for
external circuits, consider their fusing and detection characteristics as well as the above precautions
and allow sufficient margin in shut-off performance.

• Install external breakers and take other safety measures against short-circuiting and overcurrents in
external wiring.

Turning ON the Power Supply

• When you set the Operating Mode at Startup, confirm that no adverse effect will occur in the system.

16

NX-series Digital I/O Unit User’s Manual (W521)

Precautions for Safe Use

Actual Operation

• Before you start operation, always register the NX Units that are connected to the Communications
Coupler Unit in the host communications master as the Unit Configuration Information.

• Check the user program, data, and parameter settings for proper execution before you use them for
actual operation.

• If you change the fail-soft operation setting, the output status when the error occurs may also change.
Confirm safety before you change the fail-soft operation setting.

• If you use fail-soft operation, write programming to determine whether Unit I/O data is valid. Without
such programming, the user program cannot distinguish between Units for which I/O refreshing is
continued and Units for which I/O refreshing is stopped.

Turning OFF the Power Supply

• Do not disconnect the cable or turn OFF the power supply to the Controller or a Slave Terminal when
downloading data or the user program from Sysmac Studio.

• Always turn OFF the external power supply to the Units before attempting any of the following.

Mounting or removing an NX Unit, Communications Coupler Unit, or CPU Unit
Assembling Units
Setting DIP switches or rotary switches
Connecting or wiring cables
Attaching or removing terminal blocks or connectors

Units that supply power continue to supply power to the Units for up to several seconds after the
power supply is turned OFF. The PWR indicator remains lit as long as power is supplied. Confirm that
the PWR indicator is not lit before you perform any of the above.

Operation

• Confirm that the controlled system will not be adversely affected before you perform any of the fol­lowing operations.

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.

General Communications

• Do not exceed the ranges that are given in the specifications for the communications distance and
number of connected Units.

EtherCAT Communications

• Make sure that the communications distance, number of nodes connected, and method of connec­tion for EtherCAT are within specifications.
Do not connect EtherCAT Coupler Units 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 you disable the revision check in the network settings, check the slave revision
settings in the master and the actual slave revisions, and then make sure that functionality is compat­ible in the manuals or other references. You can check the slave versions in the settings from the

NX-series Digital I/O Unit User’s Manual (W521)

17

Precautions for Safe Use

Sysmac Studio and 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.
Before you transfer the user program, confirm that the system will not be adversely affected.

• EtherCAT communications are not always established immediately after the power supply is turned
ON. Use the system-defined variables in the user program to confirm that communications 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. Perform the following processing if
noise countermeasures are necessary.

Program the _EC_InDataInvalid (Input Data Disable) system-defined variable as an interlock condi­tion in the user program.
Set the PDO communications consecutive timeout detection count 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.

• 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 condi­tion in the user program.
Set the PDO communications consecutive timeout detection count 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.

Unit Replacement

• When you replace a Unit, start operation only after you transfer the settings and variables that are
required for operation to the new Unit.

Disposal

• Dispose of the product according to local ordinances as they apply.

18

NX-series Digital I/O Unit User’s Manual (W521)

Precautions for Correct Use

Storage, Mounting, and Wiring

• Follow the instructions in this manual to correctly perform installation.

• Do not operate or store the Units in the following locations. Doing so may result in malfunction, in
operation stopping, or in burning.

Locations subject to direct sunlight
Locations subject to temperatures or humidity outside the range specified in the specifications
Locations subject to condensation as the result of severe changes in temperature
Locations subject to corrosive or flammable gases
Locations subject to dust (especially iron dust) or salts
Locations subject to exposure to water, oil, or chemicals
Locations subject to shock or vibration

• Take appropriate and sufficient countermeasures during installation in the following locations.

Locations subject to strong, high-frequency noise
Locations subject to static electricity or other forms of noise
Locations subject to strong electromagnetic fields
Locations subject to possible exposure to radioactivity
Locations close to power lines

• Before touching a Unit, be sure to first touch a grounded metallic object in order to discharge any
static build-up.

• Use the rated power supply voltage for the Units that supply power. Take appropriate measures to
ensure that the specified power with the rated voltage and frequency is supplied in places where the
power supply is unstable.

• Install the Units away from sources of heat and ensure proper ventilation. Not doing so may result in
malfunction, in operation stopping, or in burning.

• Do not allow foreign matter to enter the openings in the Unit. Doing so may result in Unit burning,
electric shock, or failure.

• Use the EtherCAT connection methods and applicable cables that are specified in this manual and in
the NJ-series CPU Unit Built-in EtherCAT Port User’s Manual (Cat. No. W505). Otherwise, communi-
cations may be faulty.

Precautions for Correct Use

Actual Operation

• If you change the event level of an error, the output status when the error occurs may also change.
Confirm safety before you change an event level.

Turning OFF the Power Supply

• Do not turn OFF the power supply while data is being transferred.

• Do not turn OFF the power supply while parameters are being written to the Communications Cou­pler Unit or NX Units.

EtherCAT Communications

• Do not disconnect the EtherCAT communications cables during operation. The outputs will become
unstable. However, for the built-in EtherCAT port on the NJ-series CPU Unit, it is OK to disconnect
the communications cable from an EtherCAT Slave Terminal that has been disconnected from com­munications in the software.

NX-series Digital I/O Unit User’s Manual (W521)

19

Regulations and Standards

Regulations and Standards

Conformance to EC Directives

Applicable Directives

• EMC Directives

• Low Voltage Directive

Concepts

 EMC Directives

OMRON devices that comply with EC Directives also conform to the related EMC standards so that
they can be more easily built into other devices or the overall machine. The actual products have
been checked for conformity to EMC standards.*1

Whether the products conform to the standards in the system used by the customer, however, must
be checked by the customer. EMC-related performance of the OMRON devices that comply with EC
Directives will vary depending on the configuration, wiring, and other conditions of the equipment or
control panel on which the OMRON devices are installed. The customer must, therefore, perform
the final check to confirm that devices and the overall machine conform to EMC standards.

*1. Applicable EMC (Electromagnetic Compatibility) standards are as follows:

EMS (Electromagnetic Susceptibility): EN 61131-2
EMI (Electromagnetic Interference): EN 61131-2 (Radiated emission: 10-m regulations).

 Low Voltage Directive

Always ensure that devices operating at voltages of 50 to 1,000 VAC and 75 to 1,500 VDC meet the
required safety standards. The applicable directive is EN 61131-2.

 Conformance to EC Directives

The NX-series Units comply with EC Directives. To ensure that the machine or device in which the
NX-series Units are used complies with EC Directives, the following precautions must be observed.

• The NX-series Units must be installed within a control panel.

• You must use reinforced insulation or double insulation for the DC power supplies that are con­nected as the Unit power supplies and I/O power supplies for the NX-series Units.

We recommend that you use the OMRON S8JX-series Power Supplies. EMC standard compli­ance was confirmed for the recommended Power Supplies.

• NX-series Units that comply with EC Directives also conform to the Common Emission Standard
(EN 61131-2). Radiated emission characteristics (10-m regulations) may vary depending on the
configuration of the control panel used, other devices connected to the control panel, wiring, and
other conditions.

You must therefore confirm that the overall machine or equipment in which the NX-series Units
are used complies with EC Directives.

• You must use power supplies with an output hold time of 10 ms or longer for the DC power sup­plies that are connected as the Unit power supplies and I/O power supplies for the NX-series
Units.

• This is a Class A product (for industrial environments). In a residential environment, it may cause
radio interference. If radio interference occurs, the user may be required to take appropriate mea­sures.

20

NX-series Digital I/O Unit User’s Manual (W521)

Conformance to UL and CSA Standards

Some NX-series products comply with UL and CSA standards. If you use an NX-series product that
complies with UL or CSA standards and the machinery or system in which you use the NX-series prod­uct must also comply with the standards, refer to the Instruction Sheet that is provided with the product.
The Instruction Sheet provides the application conditions for complying with the standards.

Conformance to Shipbuilding Standards

Some NX-series products comply with shipbuilding standards. If you use an NX-series product that
complies with shipbuilding standards and the machinery or system in which you use the NX-series
product must also comply with the standards, consult with your OMRON representative. Application
conditions are defined according to the installation location. Application may not be possible for some
installation locations.

Usage Conditions for NK and LR Shipbuilding Standards

Regulations and Standards

 Usage Conditions for Locations Other Than the Bridge or Decks

• The EtherCAT Coupler Unit must be installed within a control panel.

• Gaps in the door to the control panel must be completely filled or covered with gaskets or other
material.

 Usage Conditions for the Bridge (Certified only by Nippon Kaiji Kyokai (Class

NK))

• The EtherCAT Coupler Unit must be installed within a control panel.

• Gaps in the door to the control panel must be completely filled or covered with gaskets or other
material.

• The following noise filter must be connected to the power supply line.

Name Manufacturer Model

Noise filter Cosel Co., Ltd. TAH-06-683

Conformance to KC Standards

Observe the following precaution if you use NX-series Units in Korea.

Class A Device (Broadcasting Communications Device for Office Use)

This device obtained EMC registration for office use (Class A), and it is intended to be used in places
other than homes.

Sellers and/or users need to take note of this.

Software Licenses and Copyrights

This product incorporates certain third party software. The license and copyright information associated
with this software is available at http://www.fa.omron.co.jp/nj_info_e/.

NX-series Digital I/O Unit User’s Manual (W521)

21

Unit Versions

Notched

area

Unit

specifications

LOT No.

Unit version

Lot number

Unit model number

Lot number and unit version

Unit Versions

This section describes the notation that is used for unit versions, the confirmation method for unit ver­sions, and the relationship between unit versions and Sysmac Studio versions.

Unit Versions

A “unit version” has been introduced to manage the Units in the NX Series according to differences in
functionality accompanying Unit upgrades.

Notation of Unit Versions on Products

The unit version is given with the Unit specifications on the side of the Unit or in the notched area.

The following information is provided in the Unit specifications on the Unit.

Unit model number Gives the model of the Unit.

Unit version Gives the unit version of the Unit.

Lot number Gives the lot number of the Unit.

22

Name Function

DDMYY: Lot number, : Used by OMRON.

“M” gives the month (1 to 9: January to September, X: October, Y: November, Z: December)

NX-series Digital I/O Unit User’s Manual (W521)

Unit Versions

The following information is provided in the notched area on the Unit.

Name Function

Lot number and
unit version

Gives the lot number and unit version of the Unit.

• DDMYY: Lot number, : Used by OMRON.
“M” gives the month (1 to 9: January to September, X: October, Y: November, Z: December)

•1: Unit version
The decimal portion of the unit version is omitted. (It is provided in the Unit specifications.)

Confirming Unit Versions with the Sysmac Studio

You can use the Unit Production Information on the Sysmac Studio to check the unit versions of Com­munications Coupler Unit and NX Units.

The following example is for an EtherCAT Slave Terminal.

Refer to the user's manual for the connected Communications Coupler Unit for details on how to check
the unit versions of the Units on any other type of Slave Terminal.

1 Double-click EtherCAT under Configurations and Setup in the Multiview Explorer, and then

double-click the EtherCAT Coupler Unit. Or, right-click the EtherCAT Coupler Unit and select
Edit from the menu.
The Edit Slave Terminal Configuration Tab Page is displayed.

You can also display the Edit Slave Terminal Configuration Tab Page with any of the following
operations.

Double-click EtherCAT under Configurations and Setup in the Multiview Explorer, right-click
the EtherCAT Coupler Unit in the EtherCAT Configuration Edit Tab Page, and select Edit Slave
Terminal Configuration.

Or, select the EtherCAT Coupler Unit on the EtherCAT Configuration Edit Tab Page click the
Edit Slave Terminal Configuration Button.

2 Go online.
3 Right-click the EtherCAT Coupler Unit and select Display Production Information from the

menu.

The Production Information Dialog Box is displayed.

Simple Display

In this example, “Ver.1.0” is displayed next to the Unit model.

The following items are displayed.

•Slot number

• Unit model number

NX-series Digital I/O Unit User’s Manual (W521)

Detailed Display

23

Unit Versions

Version Information

• Unit version

• Serial number

• Lot number

• Hardware version

• Software version

• Total power-ON time

The software version is displayed only for Units that contain software.

The total power-ON time is provided by function to monitor the total power-ON time. The func­tion to monitor the total power-ON time was added for a version upgrade. Refer to the user's
manual of the Communications Coupler Unit for the versions that support monitoring the total
power-ON time.

Unit Versions and Sysmac Studio Versions

The functions that are supported depend on the unit version of the Unit. The version of Sysmac Studio
that supports the functions that were added for an upgrade is also required to use those functions.

Refer to A-7 Version Information on page A-105 for the functions that are supported by each unit ver­sion.

24

NX-series Digital I/O Unit User’s Manual (W521)

Related Manuals

The following table shows related manuals. Use these manuals for reference.

Manual name Cat. No. Model numbers Application Description

NX-series Digital I/O
Units User’s Manual

NX-series Data Refer­ence Manual

NX-series Analog I/O
Units User’s Manual

NX-series System Units
User’s Manual

NX-series Position Inter­face Units User’s Man­ual

NX-series Safety Con­trol Unit User’s Manual

NX-series Safety Con­trol Unit Instructions
Reference Manual

Sysmac Studio Version
1 Operation Manual

NJ-series Troubleshoot­in

g Ma

nual

W521 NX-ID

NX-IA

NX-OC

NX-OD

NX-MD

W525 NX- Referencing lists of

W522 NX-AD

NX-DA

NX-TS

W523 NX-PD1

NX-PF0

NX-PC0

NX-TBX01

W524 NX-EC0

NX-ECS

NX-PG0

Z930 NX-SL

NX-SI

NX-SO

Z931 NX-SL Learning about the

W504 SYSMAC-

SE2

W503 NJ501-

NJ301-

Learning how to
use NX-series Dig­ital I/O Units

the data that is
required to config­ure systems with
NX-series Units
Learning how to
use NX-series
Analog I/O Units
and Temperature
Input Units
Learning how to
use NX-series
System Units

Learning how to
use NX-series
Position Interface
Units

Learning how to
use NX-series
Safety Control
Units

specifications of
instructions for the
Safety CPU Unit.

Learning about the
operating proce­dures and func­tions of the
Sysmac Studio.

Learning about the
errors that may be
detected in an
NJ-series Control­ler.

The hardware, setup methods, and
functions of the NX-series Digital I/O
Units are described.

Lists of the power consumptions,
weights, and other NX Unit data that is
required to configure systems with
NX-series Units are provided.

The hardware, setup methods, and
functions of the NX-series Analog I/O
Units and Temperature Input Units are
described.

The hardware and functions of the
NX-series System Units are described.

The hardware, setup methods, and
functions of the NX-series Incremental
Encoder Input Units, SSI Input Units,
and Pulse Output Unit are described.

The hardware, setup methods, and
functions of the NX-series Safety Con­trol Units are described.

The instructions for the Safety CPU
Unit are described.

When programming, use this manual
together with the NX-series Safety
Control Unit User’s Manual (Cat. No.
Z930).

Describes the operating procedures of
the Sysmac Studio.

Concepts on managing errors that may
be detected in an NJ-series Controller
and information on individual errors are
described.

Use this manual together with the

NJ-series CPU Unit Hardware User's
Manual (Cat. No. W500) and NJ-series
CPU Unit Software User's Manual (Cat.

No. W501).

Related Manuals

NX-series Digital I/O Unit User’s Manual (W521)

25

Related Manuals

Manual name Cat. No. Model numbers Application Description

NX-series EtherCAT
Coupler Unit User’s
Manual

NJ-series CPU Unit
Hardware User’s Man­ual

NJ-series CPU Unit
Software User's Manual

NJ-series CPU Unit
Built-in EtherCAT Port
User's Manual

NJ-series CPU Unit
Motion Control User's
Manual

W519 NX-ECC201

NX-ECC202

W500 NJ501-

NJ301-

W501 NJ501-

NJ301-

W505 NJ501-

NJ301-

W507 NJ501-

NJ301-

Learning how to
use an NX-series
EtherCAT Coupler
Unit and Ether­CAT Slave Termi­nals

Learning the basic
specifications of
the NJ-series CPU
Units, including
introductory infor­mation, designing,
installation, and
maintenance.

Mainly hardware
information is pro­vided.

Learning how to
program and set
up an NJ-series
CPU Unit.

Mainly software
information is pro­vided.

Using the built-in
EtherCAT port on
an NJ-series CPU
Unit.

Learning about
motion control set­tings and program­ming concepts.

The following items are described: the
overall system and configuration meth­ods of an EtherCAT Slave Terminal
(which consists of an NX-series Ether­CAT Coupler Unit and NX Units), and
information on hardware, setup, and
functions to set up, control, and monitor
NX Units through EtherCAT.
An introduction to the entire NJ-series
system is provided along with the fol­lowing information on the CPU Unit.

• Features and system configuration

• Overview

• Part names and functions

• General specifications

• Installation and wiring

• Maintenance and Inspection

Use this manual together with the

NJ-series CPU Unit Software User's
Manual (Cat. No. W501).

The following information is provided
on an NJ-series CPU Unit.

• CPU Unit operation

• CPU Unit features

• Initial settings

• Programming based on IEC 61131-3
language specifications

Use this manual together with the

NJ-series CPU Unit Hardware User's
Manual (Cat. No. W500).

Information on the built-in EtherCAT
port is provided.

This manual provides an introduction
and provides information on the config­uration, features, and setup.

Use this manual together with the

NJ-series CPU Unit Hardware User's
Manual (Cat. No. W500) and NJ-series
CPU Unit Software User's Manual (Cat.

No. W501).
The settings and operation of the CPU

Unit and programming concepts for
motion control are described. When
programming, use this manual together
with the NJ-series CPU Unit Hardware

User's Manual (Cat. No. W500) and
NJ-series CPU Unit Software User's
Manual (Cat. No. W501).

26

NX-series Digital I/O Unit User’s Manual (W521)

Manual name Cat. No. Model numbers Application Description

NJ-series Instructions
Reference Manual

NJ-series Motion Con­trol Instructions Refer­ence Manual

W502 NJ501-

NJ301-

W508 NJ501-

NJ301-

Learning detailed
specifications on
the basic instruc­tions of an
NJ-series CPU
Unit.

Learning about the
specifications of
the motion control
instructions.

The instructions in the instruction set
(IEC 61131-3 specifications) are
described.

When programming, use this manual
together with the NJ-series CPU Unit
Hardware User's Manual (Cat. No.
W500) and NJ-series CPU Unit Soft-
ware User's Manual (Cat. No. W501).

The motion control instructions are
described. When programming, use
this manual together with the NJ-series
CPU Unit Hardware User's Manual
(Cat. No. W500), NJ-series CPU Unit
Software User's Manual (Cat. No.
W501) and NJ-series CPU Unit Motion
Control User's Manual (Cat. No.
W507).

Related Manuals

NX-series Digital I/O Unit User’s Manual (W521)

27

Terminology

Terminology

Term

application layer status, AL status --- Status for indicating information on errors that occur in an application on

CAN application protocol over Ether­CAT
CAN in Automation CiA CiA is the international users' and manufacturers' group that develops

Communications Coupler Units --- The generic name of an interface unit for remote I/O communications on

DC time --- EtherCAT slaves that support distributed clock synchronization have a

device profile --- A collection of device dependent information and functionality providing

device variable --- A variable in the NJ-series CPU Unit to which process data on an Ether-

distributed clock DC Clock distribution mechanism used to synchronize EtherCAT slaves and

EtherCAT slave controller ESC A controller for EtherCAT slave communications.
EtherCAT slave information ESI An XML file that contains setting information for an EtherCAT slave.
EtherCAT state machine ESM An EtherCAT communications state machine.
EtherCAT Technology Group ETG The ETG is a global organization in which OEM, end users, and technol-

I/O map settings --- Settings that assign variables to I/O ports. Assignment information

I/O port --- A logical interface that is used by the CPU Unit to exchange data with an

I/O refreshing --- Cyclic data exchange with external devices that is performed with prede-

index --- Address of an object within an application process.
network configuration information --- The EtherCAT network configuration information held by the EtherCAT

NX bus --- The NX-series internal bus.
object --- An abstract representation of a particular component within a device,

object dictionary OD Data structure that contains description of data type objects, communi-

Operational --- A state in EtherCAT communications where SDO communications and

PDO communications --- An acronym for process data communications.
Pre-Operational --- A state in EtherCAT communications where only SDO communications

primary periodic task --- The task with the highest priority.
process data --- Collection of application objects designated to be downloaded cyclically

process data communications --- One type of EtherCAT communications in which process data objects

Abbre­viation

a slave.

CoE A CAN application protocol service implemented on EtherCAT.

and supports higher-layer protocols.

a network between NX Units and a host network master.

clock that is shared by all slaves in the network. The time that is based
on this distributed clock is called the DC time.

consistency between similar devices of the same device type.

CAT slave is allocated. Slave process data is accessed by directly read­ing and writing device variables from user applications on the NJ-series
CPU Unit.

the EtherCAT master.

ogy providers join forces to support and promote the further technology
development.

between I/O ports and variables.

external device (slave or Unit).

termined memory addresses.

master.

which consists of data, parameters, and methods.

cation objects and application objects.

I/O are possible.

are possible with the slaves, i.e., no I/O can be performed.

or acyclically for the purpose of measurement and control.

(PDOs) are used to exchange information cyclically and in realtime. This
is also called PDO communications.

Description

28

NX-series Digital I/O Unit User’s Manual (W521)