Omron Programmable Terminals NT631, NT631C Setup Manual

Setup Manual

Cat. No. V063-E1-03

NT631 and NT631C

Programmable Terminals

NT631 and NT631C
Programmable Terminals

Setup Manual

Revised September 2007

POWER

RUN

iv

v

Notice:

OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.

The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or dam­age to property.

!DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or

serious injury. Additionally, there may be severe property damage.

!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or

serious injury. Additionally, there may be severe property damage.

!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or

moderate injury, or property damage.

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.

The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.

The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program­ming Device displays to mean Programmable Controller.

Visual Aids

The following headings appear in the left column of the manual to help you locate different types of
information.

Note Indicates information of particular interest for efficient and convenient opera-

tion of the product.

1,2,3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.

 OMRON, 2000

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o

r

by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o

f

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.

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vii

TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv

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

2 General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

SECTION 1

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1-1 Role and Operation of the NT631/NT631C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-2 Functions of the NT631/NT631C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1-3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-4 Communications with the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-5 Communications Using Memory Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1-6 Before Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

SECTION 2

Preparing for Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2-1 Method for Connection to the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2-2 Names and Functions of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

SECTION 3

Hardware Settings and Connections. . . . . . . . . . . . . . . . . . . 31

3-1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3-2 Connecting to the Support Tool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3-3 Connecting a Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3-4 Connecting a Bar Code Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3-5 Using a Memory Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

SECTION 4

Connecting to the Host from the RS-232C Port. . . . . . . . . . 47

4-1 Connecting to the RS-232C Port at the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

SECTION 5

Connecting to the Host from the RS-422A/485 Port . . . . . . 79

5-1 Connecting to the Host’s RS-232C Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

5-2 Connecting to the Host’s RS-422A/485 Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

SECTION 6

System Menu Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

6-1 System Menu Operation Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

6-2 Starting the NT631/NT631C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

6-3 Operation Modes and the System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

6-4 Memory Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

viii

TABLE OF CONTENTS

6-5 Operations in the System Installer Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

6-6 Transmitting the Screen Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

6-7 Setting Conditions for Communications with Host by Using Memory Switches. . . . . . . . . 152

6-8 Starting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

6-9 Various System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

6-10 Setting the Bar Code Reader Input Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

6-11 System Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

6-12 Programming Console Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

6-13 Device Monitor Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

6-14 Version Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

SECTION 7

Troubleshooting and Maintenance . . . . . . . . . . . . . . . . . . . . 225

7-1 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

7-2 Responding to Displayed Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229

7-3 Maintenance of the NT631/NT631C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

7-4 Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Appendices

A Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

B Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

C Using an RS-232C/RS-422A Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

D Transporting and Storing the NT631/NT631C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

E Making the Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

F Making the Cable for Connecting a PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

G Making the Cable for Connection to a Bar Code Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

H Making the Cable for Connection to a Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

I Relationship between system program and hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

J Model List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

K Option List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

ix

About this Manual:

This manual describes connecting the NT-series NT631 and NT631C Programmable Terminals (PTs)
to a PLC (Programmable Controller) or other host and peripheral devices, and the settings required for
communications and applications. It includes the sections described below.

Please read this manual carefully and be sure you understand the information provided before
attempting to install and operate the Programmable Terminal.

Section 1 provides fundamental information about the functions and features of the PTs, types of con­nection, communications methods, etc. This information will enable you to understand the applications
of the PTs.

Section 2 describes the connection methods that are possible with the PTs, and the functions of the
parts of PTs, as the required knowledge before connecting to the host and to the peripheral devices.

Section 3 describes the settings of the PTs and methods for connection to peripheral devices.

Section 4 describes the method for connecting to the host using the RS-232C port of the PT.

Section 5 describes the method for connecting to the host using the RS-422A/485 port of the PT.

Section 6 describes the operation of the System Menu, focusing on the procedure to start the PT.

Functions that are convenient when using the PT and those that are useful for system maintenance
are also explained here.

Section 7 describes the action to take when errors occur in the PT, and how to carry out maintenance
and inspection to prevent the occurrence of errors.

The Appendices provide specifications, dimensions, procedures for using an RS-232C/RS-422A
Adapter, procedures for transporting and storing the PT, information on cable preparation, information
on the relationship between the system program and hardware, and product lists.

!WARNING Failure to read and understand the information provided in this manual may result in per-

sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

x

Related Manuals:

Related manuals are listed below.
The @ symbol at the end of the catalog number is the revision number.

Connecting and Setting Up the Programmable Terminal

• NT631 and NT631C PT Setup Manual (V063-E1-@, this manual)

This manual describes connecting the Programmable Terminals to a host and peripheral devices and
settings required for communications and applications.

The functions and actual operating methods for the NT631 and NT631C PTs are provided in the Refer-
ence Manual (V064-E1-@).

Programmable Terminal Functions and Operation

• NT31/31C/631/631C PT Reference Manual (V064-E1-@)

This manual is used for any of the following PTs: NT31, NT31C, NT631, and NT631C. It describes
screen configurations, part functions, host control methods, and other application information.

PT connection and setup procedures are described in the NT631 and NT631C PT Setup Manual
(V063-E1-@).

Creating and Transferring Screen Data, and Installing the System Program

• NT-series Support Tool for Windows Ver. 4.@ Operation Manual (V061-E1-@)

The screens displayed on the NT631 and NT631C PTs are created with the Support Tool and trans­ferred to the PT. This manual describes how to create and transfer screen data. It also describes how
to download a system program to a PT using the System Installer.

The NT-series Support Tool for Windows is normally referred to as merely the Support Tool.

Connecting to Controllers Not Made by OMRON

• PLC Connection Manual (V042-E1-@)

The NT631 and NT631C PTs can be connected to controllers in the following series: Mitsubishi A
Series and FX Series. This manual describes the connection and setup methods for these controllers.

The NT-series Support Tool for Windows Version 4.@ is required to connect the NT631 and NT631C
PTs to these controllers.

• NT31/NT631 Multi Vendor Connection Manual (V060-E1-@)

The NT631 and NT631C PTs can be connected to controllers in the following series: Allen-Bradley
SLC 500 Series, GE Fanuc 90-20 and 90-30 Series, and Siemens S7-300 and S7-400 Series. This
manual describes the connection and setup methods for these controllers.

xi

Read and Understand this Manual

Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING 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 responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

xii

Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.

At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:

• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.

• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.

• Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.

xiii

Disclaimers

CHANGE IN SPECIFICATIONS

Product specifications and accessories may be changed at any time based on improvements and other
reasons.

It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.

PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.

ERRORS AND OMISSIONS

The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

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xv

PRECAUTIONS

This section provides general precautions for using the Programmable Terminal.

The information contained in this section is important for the safe and reliable application of the Programmable
Terminal. You must read this section and understand the information contained before attempting to set up or operate
a Programmable Terminal.

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

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

xvi

Intended Audience 1

1 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 into production facilities.

• Personnel in charge of designing FA systems.

• Personnel in charge of installing and connecting FA systems.

• Personnel in charge of managing FA systems and facilities.

2 General Precautions

The user must operate the product according to the performance specifica­tions described in the operation manuals.

Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amuse­ment machines, safety equipment, and other systems, machines and equip­ment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.

Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.

This manual provides information for using the Programmable Terminal. Be
sure to read this manual before attempting to use the software and keep this
manual close at hand for reference during operation.

!WARNING It is extremely important that Programmable Terminals and related devices be

used for the specified purpose and under the specified conditions, especially
in applications that can directly or indirectly affect human life. You must con­sult with your OMRON representative before applying Programmable Termi­nals to the above-mentioned applications.

!WARNING Do not use input functions such as PT touch switches for applications where

danger to human life or serious damage is possible, or for emergency switch
applications.

3 Safety Precautions

Read these safety precautions carefully and make sure you understand them
before using the Programmable Terminal so that you can use it safely and cor­rectly.

Safety Conventions and their Meanings

This operation manual uses the following conventions and symbols to indicate
cautions, warnings, and dangers in order to ensure safe use of the NT631/
631C.
The cautions, warnings, and dangers shown here contain important informa­tion related to safety. This instructions in these cautions, warnings, and dan­gers must be observed.

The conventions used and their meanings are presented below.

xvii

Safety Precautions 3

!WARNING Indicates information that, if not heeded, could possibly result in loss of life or

serious injury.

!Caution Indicates information that, if not heeded, could result in relatively serious or

minor injury, damage to the product, or faulty operation.

WARNING

Do not attempt to take the unit apart and do not touch any
internal parts while the power is being supplied. Doing either
of these may result in electrical shock.

WARNING

Switch OFF the NT631C power before replacing the
backlight. Otherwise you could sustain an electric shock.

xviii

Safety Precautions 3

1

SECTION 1

General

This section provides fundamental information about the functions and features of the NT631/NT631C, types of
connection, communications methods, etc. This information will enable you to understand the applications of the
NT631/NT631C.

1-1 Role and Operation of the NT631/NT631C. . . . . . . . . . . . . . . . . . . . . . . . . . 2

1-1-1 Operation of an NT631/NT631C at an FA Production Site. . . . . . . 2

1-1-2 Operations of the NT631/NT631C . . . . . . . . . . . . . . . . . . . . . . . . . 3

1-2 Functions of the NT631/NT631C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1-2-1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1-2-2 Comparison between NT631 and NT631C . . . . . . . . . . . . . . . . . . . 7

1-2-3 Comparison between NT620S/NT620C/NT625C and NT631/NT631C 8

1-2-4 Principal Functions of NT631/NT631C. . . . . . . . . . . . . . . . . . . . . . 10

1-2-5 Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1-3 System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-3-1 Peripheral Devices That Can Be Connected . . . . . . . . . . . . . . . . . . 17

1-3-2 Connecting to the Host. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-4 Communications with the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-4-1 Direct Connection Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-4-2 Host Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1-4-3 NT Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

1-4-4 Connecting to Other Companies’ PLCs. . . . . . . . . . . . . . . . . . . . . . 21

1-5 Communications Using Memory Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1-5-1 Memory Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1-5-2 Comparison between Direct Connection and Memory Link . . . . . . 22

1-5-3 Memory Link Online Transfer Function . . . . . . . . . . . . . . . . . . . . . 22

1-6 Before Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2

Role and Operation of the NT631/NT631C Section 1-1

1-1 Role and Operation of the NT631/NT631C

The NT631/NT631C is a sophisticated display unit (Programmable Terminal)
which automatically displays information and can also be used for operations
when necessary. The following gives a general description of the role and
operation of the NT631/NT631C for those using a programmable terminal
(PT) for the first time.

1-1-1 Operation of an NT631/NT631C at an FA Production Site

Production Line Status
Monitoring

The NT631/NT631C displays real-time information about the system and
equipment operating status, etc. Its power of expression is enhanced by
graphs and other visuals, making the displays easy to understand.

Directions to Workers on
the Shop Floor

The NT631/NT631C warns of system or equipment failures and prompts the
appropriate remedial action.

Panel Switch Functions Setting touch switches on the NT631/NT631C allows workers to use the

NT631/NT631C as an operating panel; the results of the operations are trans­mitted to the host.

Alarm

Assembly line B

Positioning pin

is defective. Line stopped.

Check the following.

1. Defective pin L3

2. Position of dog M2

3. Mounting of photosensor P5

Electroplating control

Transpor t

Clamp

Unclamp

Int. stop

Adv.

Rev.

Wash

Wash .
head

Corr. prv.
head

Electr.
head

Electro­lyte

Corr.
prv.fluid

3

Role and Operation of the NT631/NT631C Section 1-1

1-1-2 Operations of the NT631/NT631C

Displays Screens The information to be displayed (screen data) can be created on a computer

using the Support Tool and stored in the NT631/NT631C. The screen data
can be displayed on the NT631/NT631C in response to instructions from the
host or touch switch operation.

Receives Data from a Host The NT631/NT631C can be connected to the host by a host link or NT link

and receive necessary data from the host.

Sends Data to a Host Data input using the touch panel (switch ON/OFF statuses, numeric values,

character strings) can be transmitted to the host.

Screen Data The screen data to be displayed on the NT631/NT631C can be created on a

personal computer using the Support Tool. Connect the NT631/NT631C to
the personal computer with an RS-232C cable and transmit the screen data to
the NT631/NT631C.

Host

The screen data designated by
instructions from the host or touch
switch operation is displayed.

Host Link, NT link

Host

Touch panel

Host

ON/OFF information, numeric
data, etc.

Create screen data.

Screen data

RS-232C

Personal
computer
(Support Tool)

When the host is connected at serial port A,
the personal computer is only connected
when communicating screen data between
the NT631/NT631C and Support Tool.

4

Functions of the NT631/NT631C Section 1-2

1-2 Functions of the NT631/NT631C

The NT631/NT631C has the following features.

1-2-1 Features

Slim Body • High-performance in a low-profile body (50 mm or less in the panel*).

• The communications cable connectors are housed in the PT so that they
do not protrude from the PT.

* When mounted in a panel of the recommended thickness (page 32).

Construction Best Suited
to the FA Environment

• The display panel is provided with a high-contrast monochrome EL dis­play for the NT631-ST211@-EV2, an STN color LCD display with back­light for the NT631C-ST141@-EV2, and a TFT color LCD high-definition
display for NT631C-ST153@-EV3.

• The backlight unit and battery can be replaced at the operation site. (The
backlight for the NT631C-ST153@-EV3, however, cannot be replaced by
the user.)

• Protection equivalent to oil-proof IP65*, and waterproof structure equiva­lent to the NEMA4 standard*.

* The panel may not be usable in environments where it is exposed to oil

for long periods.

Touch Switch Operation Contrast and brightness are adjustable by touch switch operations (for

NT631C-ST141@-EV2 only).

Compatibility with Other
PTs

• There is upward compatibility between the NT631/NT631C and the follow­ing models for screen data and user programs: NT11S, NT20S, NT30,
NT30C, NT31, NT31 NT600S, NT610G, NT610C, NT620S, NT620C,
NT625C. (After being read to the Support Tool, screens must be modified
in accordance with the screen size. Depending on the function used, par­tial modification of programs may also be necessary. For details on the
compatibility of screen data, refer to the NT31/NT31C/NT631/NT631C

Programmable Terminal Reference Manual and the NT-series Support
Tool Operation Manual.

• The dimensions of the panel cut-out to accommodate the NT631/NT631C
are the same as for the NT625C.

POWER

RUN

640 dots

480 dots

Wide angle of visibility

5

Functions of the NT631/NT631C Section 1-2

Two Ports Featured as
Standard:

Port A for Common Use by Support Tool/Host and Port B for Exclusive
Use by the Host

• Communications with the host is possible via another port while con­nected to the Support Tool.

• Reading bar code data from a bar code reader is possible via another port
while communicating with the host.

Rapid System Program &
Screen Data Changes
Possible Using a Memory
Unit.

• Installing a Memory Unit (type NT-MF261) on the rear of the NT631/
NT631C makes it easy to write screen data into the NT631/NT631C on
site. This enables a rapid response to setup changes.

• NT631/NT631C can store a system program into a Memory Unit. This
enables the system to handle more flexible setups.

Screen Data Check
Function

Screen data can be checked simply by operations at the NT631/NT631C sys­tem menu, without connecting up to the Support Tool.

Large Increase in
Maximum Number of
Registered Elements

The number of elements that can be registered on one screen has been con­siderably increased, making it possible to create more expressive screens.
For details, refer to Display Restrictions in Appendix A Specifications of the

NT31/NT31C/NT631/NT631C Programmable Terminal Reference Manual.

Binary Data can be Read
to/Written from the Host

It is now possible to write binary data stored in words at the host directly to the
NT631/NT631C. This makes data conversion by a program at the host unnec­essary, reducing the load on the host.

Character Display Using
High Definition Fonts

Any quadrupled characters are displayed with a 32 dot high-definition font.

Simple Version Upgrades By using the system installer supplied with the Support Tool (Type NT-

ZJCAT1-EV4), the system program at the NT631/NT631C can be changed
easily from a personal computer.

Complies with
International Standards

The NT631/NT631C meets UL/CSA standards and EC directives.

Compatible with Other
Vendors’ Devices

Compatible with Sequencers in the following series: Mitsubishi A-series (Cal­culator Link) and FX-series (Programming Console), Allen-Bradley SLC 500
Series, GE Fanuc 90-20 and 90-30 Series, and Siemens S7-300 and S7-400
Series. Specialized system programs can be installed that allow the NT631/
NT631C to be controlled from other companies’ Sequencers.

Multiple Windows Up to 3 windows can be displayed simultaneously in the normal screen. A 9-

word window control area has been allocated to the host; the contents of
these 9 words can be changed from the Host to open, close, and move win­dows.

High-speed 1:N NT Link The V2 versions are compatible with the high-speed 1:N NT Link as well as

the earlier standard 1:N NT Link.

Additional Mathematical
Functions

Operands (values referenced by formula) can be registered to allow the PT to
perform calculations automatically and write the results of those calculations
to numeral memory tables or words in the host.

6

Functions of the NT631/NT631C Section 1-2

Device Monitor Function The new device monitor function can be used to change the PLC’s operating

mode or display/change values in the PLC’s memory areas. The present val­ues (PVs) of several words can be listed with the device monitor.

Interlock Function PT operations and inputs can be disabled from the PLC if interlock bits have

been allocated in the PLC for the corresponding PT touch switches, numeric
inputs, or string inputs.

Improved Lamp/Touch
Switch Labels

The following displays can be performed with lamp or touch switch labels:

• Display several lines of labels.

• Switch the display between different labels when OFF and ON.

• Display the numeral memory table contents as labels.

• Display the string memory table contents as labels.

NT30/NT30C and NT620S/
NT620C/NT625C
Emulation

The word configuration of the PT status control area and PT status notify area
can be set to emulate those of the NT30/NT30C or NT620S/NT620C/
NT625C; this mode is called NT30/620 compatible mode.

When the PT is operating in NT30/620 compatible mode, it will be equivalent
to an NT30/NT30C or NT620S/NT620C/NT625C in the functions listed below.
The PT retains full V2 functionality in all functions other than the ones listed
below. Refer to Appendix C in the NT31/NT31C/NT631/NT631C Programma-
ble Terminal Reference Manual for more details.

• Word configuration and functions of the PT status control area and PT
status notify area

• Image/library codes

• Insertion of image/library data into character strings

Additional CS/CJ-series
Data Areas Accessible

Data areas in CS/CJ-series PLCs that were previously inaccessible can be
accessed. The data areas listed below can be accessed (read/written).

All banks in the EM area, timer completion flags (TU), counter completion
flags (CU), Work areas (WR), Task flags (TK), and the HR area.

Recipe Function You can set the data (numeric values) for multiple words in record units using

the tabular elements on the PT screen, and write these settings in a single
operation to words on the host (i.e., PLC or PT memory) using a touch switch
operation on the PT Unit. Also, multiple words of numeric data can be read
from the host in one operation. In this way, groups of parameter settings can
be edited at the PT Unit, and written to or read from the host.

Adjusting Contrast and
Brightness During PT
Operation

You can display the brightness and contrast adjustment screen using either
the touch switch or commands from the host, even while the PT is in opera­tion.

7

Functions of the NT631/NT631C Section 1-2

1-2-2 Comparison between NT631 and NT631C

Two NT631 models — the NT631, which is capable of versatile graphic dis­plays (EL display, yellow), and the NT631C, which is also capable of color dis­play — are available. The differences between the NT631 and NT631C are
tabled below:

Beige and black are the front panel colors of each NT631/NT631C types.

Function NT631-ST211@-EV2 NT631C-ST141@-EV2 NT631C-ST153@-EV3

Type NT631-ST211-EV2 (Beige)

NT631-ST211B-EV2 (Black)

NT631C-ST141-EV2 (Beige)
NT631C-ST141B-EV2 (Black)

NT631C-ST153-EV3 (Beige)
NT631C-ST153B-EV3 (Black)

Display
panel

Monochrome EL display STN color LCD display

(with white backlight)

TFT color LCD display
(with white backlight)

8

Functions of the NT631/NT631C Section 1-2

1-2-3 Comparison between NT620S/NT620C/NT625C and NT631/

NT631C

Item NT620S/NT620C/NT625C NT631/NT631C

Support Tool used NT-ZJCAT1-EV4 or NT-ZA3AT-EV2 NT-ZJCAT1-EV4

DIP switches On rear of PT None (software settings)

Use of Memory Unit Not possible Possible

RS-232C interface Connector (9-pin) also used as port for

screen data transfer.

- Serial port A connector (also used for screen
data transfer, 9-pin)

- Serial port B connector (for host communica­tions only, 9-pin)

RS-422A/485 interface NT620S/NT620C: None

NT625C: Terminal block (DIP-switch
selectable between RS232C and RS­422A/485)

Terminal block (serial port B; memory-switch
selectable between RS232C and RS-422A/485)

Replacement backlight NT620C-CFL01 (NT620C)

NT610C-CFL02 (NT625C)

NT631C-CFL01 (for ST151; the backlight for the
NT631C-ST152@-EV2, NT631C-ST153@-EV3,
however, cannot be replaced by the user)

NT631C-CFL02 (for ST141)

NT631/NT631C system pro­gram data

NT620-ZS3AT-EV1/EMV1
(including system installer)

The system installer and system program data
are supplied with the Support Tool.

High-speed 1:N NT Link Not possible Possible

Memory
Link

System program Exclusive use by Memory Link Same as OMRON connection

Screen data Shared with OMRON connection Exclusive use by Memory Link

LCD contrast adjustment By a control on the rear of the PT By touch panel operation

(Possible in the NT631-ST141@-V2 only.)

Backlight brightness adjust­ment

Not possible By touch panel operation

(Possible in the NT631-ST141@-V2 only.)

Number of user-registered
screens

Maximum of 2000 Maximum of 3999

Screen data capacity

*1

(User program memory)

NT620S: 512 KB
NT620C/NT625C: 1 MB

1 MB

Numeral string data Maximum of 1000 Maximum of 2000

Character string data Maximum of 1000 Maximum of 2000

Bit data 256 Maximum of 1000

Mathematical tables None 256 max.

Calculations can be executed automatically in
the PT.

Image data Maximum of 224

Maximum of 4095

*2

Library data Maximum of 896

Maximum of 12288

*2

Method for storing numeric
values
(numeral memory data and PT
status control area)

Fixed as BCD (binary coded decimal) Selectable from BCD (binary coded decimal) or

binary

PT status control area size 4 words

5 words (partial change of contents)

*2

PT status notify area size 3 words

2 words (partial change of contents)

*2

Window control area size None 9 CH

Registering continuous screen Possible Not possible (Use a screen switchover as a sub-

stitute.)

Lamp/Touch switch labels Fixed display (1 line only) - Multiple lines can be displayed

- ON/OFF switching is possible

- Numeral display is possible

- Character string display is possible

9

Functions of the NT631/NT631C Section 1-2

*1

This is the capacity of the flash memory that stores screen data.

*2

The values are the same as the NT30/NT30C when the PT is in NT30/620 compatible mode.

For differences in programming, refer to Appendix B in the NT31/NT31C/NT631/NT631C Programmable Termi-
nal Reference Manual.

Interlock function None Operations can be disabled from the PLC by

allocating interlock bits to the corresponding
touch switch, numeral input, or character string
input.

Device monitor function Not possible Possible

Recipe function None Possible

Accessible CS/CJ-series PLC
data areas

--- The data areas listed below can be accessed in
addition to the data areas accessible with the
NT30/NT30C.

- EM banks (EM_0 to EM_C)

- Timer completion flags (TU)

- Counter completion flags (CU)

- Work areas (WR)

- Task flags (TK)

- HR area

Item NT620S/NT620C/NT625C NT631/NT631C

10

Functions of the NT631/NT631C Section 1-2

1-2-4 Principal Functions of NT631/NT631C

The following are the principal functions of the NT631/NT631C.

Functions relating to data display

Character display

Graphic display

Memory data display

Graph display

Lamp display

Alarm list/history display

Functions relating to data output

Buzzer

A built-in buzzer can be sounded.

Screen printing

Warning messages are automatically displayed in a list in response to the state of a host bit. The
time and the number of times of the messages appeared can also be displayed.

Lamps can be turned on and flashed under the control of the host. It is also possible to display
different graphics in the ON and OFF states.

Not only bar graphs but also broken line graphs, trend graphs, and analogue meter graphs can
be displayed using numeral memory tables

The contents of character string memory tables and numeral memory tables can be displayed.
The contents of memory tables can be changed from the host.

Polylines, rectangles, polygons, circles, circular arcs, and sector shapes can be displayed.
They can also be tiled with various patterns, flashed, or displayed in reverse video.

Characters of various sizes can be displayed. Characters can be flashed and displayed in reverse
video. High grade fonts are available for the characters with their size enlarged.

A hard copy of the currently displayed screen can be printed at the
printer connected to the NT631/NT631C.

11

Functions of the NT631/NT631C Section 1-2

Functions relating to the system

System menu

System settings and maintenance can be performed by selecting from system menus displayed on the screen.

Creation of screen data

Resume function

Screen saver function

This function serves to extend the service life of the backlight and EL and prevent the formation of an afterimage on the screen.

Clock function

The time can be displayed in accordance with the internal clock data.

Programming Console function

Device Monitor function

System program install function

Screen display history function/alarm history function

Trend graph logging function and background function

Mathematical function

Functions relating to data input

Input by touch switches

Pop-up window function

Numeral/character string setting function

Recipe function

Several words of numeric data can be edited at the PT Unit, and written to or read from the host in one operation.

Input from a bar code reader

Data read with a bar code reader can be input to a character string input field.

Functions relating to communications

Communications with the host

Numeric keys and character keys can be assigned to touch switches so that numeric values and character strings
can be input at the operation site.
The input data is written to numeral/character string memory tables and also sent to the host. It is also possible to
disable input by control from the host.

A window overlaying the currently displayed screen can be alternately opened and closed by pressing a touch
switch.In addition to fixed character and graphic displays, control keys and character keys created as touch
switches can also be set inside the window.
A maximum of three windows can be displayed simultaneously.
Since the window need only be opened when input is required, the screen can be used efficiently.

Data can be input by simply touching touch switches displayed on the screen.
The possible functions of touch switches include sending data to the host and changing the screen display.
Inputs can be enabled and disabled from the host when interlock bits have been allocated.

The NT631/NT631C can communicate with the host by four methods: host link, 1:1 NT link, 1:N NT link (standard
or high-speed), and Memory link. Data can be read from the host, and data input by means of touch switches and
numeral/character string settings can be sent to the host. It is also possible to connect with other model PCs.

This function allows calculations to be executed continuously during PT operation when mathematical table have been set
in screen data. Arithmetic operations, bit operations, logic operations, and comparison operations can be performed.
Operations with up to 5 terms are possible.

Changes in the contents of numeral memory tables displayed in trend graphs can be recorded (logging function). Also, the
record can be maintained even when the trend graph is not displayed (background function).

The screen display history function records the time at which specific screens are displayed and the number of times
they are displayed. The alarm history function records the time at which specific bits at the host are turned ON and the
number of times they are turned ON.

The system program of the NT631/NT631C can be changed by using the system installer supplied with the Support Tool
(NT-ZJ3AT1/ZJCAT-EV2). It can also be installed by using a memory unit (NT-MF261).

When the PT is connected to a PLC in a 1:1 NT Link or 1:N NT Link, the PT can be used for operations such as
changing the PLC's operating mode, displaying or changing the PVs of words, or reading the error log.

When the NT631/NT631C is connected to a C-series CPM1, CPM2A, CPM2C, CQM1, CQM1H, or C200HX/HG/
HE(-Z)E Programmable Controller in an NT link (1:1) connection, or is connected to CS/CJ-series in an NT link (1:N)
connection, operations equivalent to those of a Programming Console (C200H-PR027-E) are possible.

The status and memory table contents of the NT631/NT631C immediately before its operation is stopped can be stored
while operation is stopped, or while the power is off, and then displayed on the screen again when operation is restarted.

Screen data created using the Support Tool at a personal computer can be transferred and stored in the built-in screen
data memory.

12

Functions of the NT631/NT631C Section 1-2

1-2-5 Displays

The NT631/NT631C can display various kinds of elements such as charac­ters, numeric values, graphs, lamps, and touch switches, on a screen. The
screen data displayed by the NT631/NT631C are created by using the Sup­port Tool at a personal computer.

Fixed Displays Characters and various graphics (circles, circular arcs, sectors, polylines,

polygons and rectangles) whose display does not have to be changed, and
mark data, image data, and library data that has already been registered, can
be written directly onto the screen.

Marks are graphics comprising 16 by 16 dots that can be used as characters.
They can be used as custom characters within character strings.

Image data are graphics comprising any required area of dots. They are regis­tered in advance and as many as required can be displayed at any position on
the screen.

Windows bit map (BMP) data can be used for images.

There is a two-color mode, in which the display color and background color of
the image are specified when it is registered in a screen, and an eight-color
mode in which colors are assigned to the image in advance.

Since image data is composed of dots, it requires a large data size but offers
great powers of expression.

Library data are combinations of fixed display graphics registered as a single
graphic. They are registered in advance and as many as required can be dis­played at any position on the screen.

Since it is generated by combining graphics, library data has a small data
size.

Lamps

Touch switches

Bar graph

Characters
(fixed display)

Characters
(character string display)

Numeric values
(numeral display)

Polyline Polygon Rectangle

Circle SectorArc

* A continuous straight line

with up to 256 points can
be drawn.

* A polygon with up to

255 vertices can be
drawn.

13

Functions of the NT631/NT631C Section 1-2

Lamps These are graphics whose display status changes in accordance with the

states of bits at the host. Squares, circles, sectors and polygons can be used
for lamps (normal (standard) lamps). In accordance with the status of the host
bit, they can be lit (displayed in reverse video) or flashed (repeated alternation
between normal and reverse video display states).

Lamps can also display different image/library data for the ON and OFF states
of the host bit (such lamps are called image/library lamps).

There are four standard lamp labels: fixed display character strings, ON/OFF
switching character strings, numeral displays, and character string displays.
When fixed display character strings or ON/OFF switching character strings
are used, several lines of labels can be displayed.

Normal (Standard) Lamps

Image/Library Lamps

Touch Switches These switches can be set at any location on the screen. Pressing a touch

switch on the screen where a touch switch has been set can have the follow­ing effects:

Notification to a host bit (input notification function)

Changing the displayed screen (screen switching function)

Input of a numeric value or character string (input key function)

Copying of a numeric value or character string (copy key function)

Shifting to another numeric value or character string input field (cursor
moving key function)

Obtaining a hard copy of the screen (screen print function)
Opening / Closing a window
Moving a window

Touch switches can be made to light or flash in accordance with the status of
a host bit in the same way as lamps.

The following 8 types of display graphic can be used for touch switches:

Mark Image data Library data

ON

ON

Host

Unlit state Lit state

ON

Unlit state Lit state

Host

14

Functions of the NT631/NT631C Section 1-2

Standard, shadow, 3-dimension, no display frame, rectangle, circle, poly­gon, sector

When rectangle, circle, polygon, or sector is selected as the shape, the area
within which pressing of the touch switch is sensed (the touch switch area)
can be set independently of the position where the display graphic is set.

There are four touch-switch labels: fixed display character strings, ON/OFF
switching character strings, numeral displays, and character string displays.
When fixed display character strings or ON/OFF switching character strings
are used, several lines of labels can be displayed.

Numeral Display Numeric values stored in the numeral memory tables are displayed. The dis-

played numerals can be changed by changing the data stored in the numeral
memory tables.

Hexadecimal values can also be displayed.

When decimal values are displayed, the number of digits for the integral part
and fractional part of displayed values can be specified in advance.

String Display Character strings stored in the character string memory tables are displayed.

The displayed character strings can be changed by changing the data stored
in the character string memory tables.

Numeral Input Numeric values can be input at the PT by using touch switches. The input

numeric values can also be stored in a numeral memory table and notification
sent to the host.

Numeral inputs can be enabled and disabled from the host when an interlock
bit has been allocated.

String Input Character strings can be input at the PT by using touch switches, bar code

readers, etc. The input character strings can also be stored in a character
string memory table and notification sent to the host.

String inputs can be enabled and disabled from the host when an interlock bit
has been allocated.

Function executed

Touch
switch area

Display
frame

When this
position is
pressed...

Shown
in
reverse
video

7 8 9
4 5 6
1 2 3

0 .

12345678

Window

Input

"

NT631C

NT631C NT631

NT31C

Character string setting input field

Display

Input

15

Functions of the NT631/NT631C Section 1-2

Thumbwheel Switches Numeric values can be input by incrementing or decrementing each digit with

the corresponding touch switch (+, –). The input numeric values can also be
stored in a numeral memory table and notification sent to the host.

Thumbwheel switch inputs can be enabled and disabled from the host when
an interlock bit has been allocated.

Graphs These are graphics whose display changes in accordance with the numeric

values stored in numeral memory tables. There are the following four types.

Bar graphs:

Bar graphs display the present value in a numeral memory table converted to
a percentage within the range –100% to +100% of a preset value.

Analogue meter:

Analogue meters display, using a quarter, half, or full circle shape, the present
value in a numeral memory table converted to a percentage within the range –
100% to +100% of the preset value. Users can choose from moving pointer
type and filling area type displays. Users can also add graduation to the
graph.

Broken line graphs:

Broken line graphs display, in an easy-to-read form, a sequence of numeral
memory table values converted to a percentage within the range –100% to
+100% of a preset value.

Trend graphs:

Trend graphs display chronological changes in the value in a numeral memory
table, converting the value to a percentage within the range –100% to +100%
of a preset value. The trend graph shifts position with the passage of time.

Past data can also be recorded, and the numeral memory table can be read
(sampled) even while the trend graph is not being displayed.

The user can choose to stop sampling, restart sampling, or display past data,
by pressing touch switches.

60%

60%

100%

−100%

0%

Example showing a series of
11 numeral memory table
values (with a check mark
set for the display sign)

16

System Configuration Section 1-3

Alarm List/History The alarm list/history function displays messages in list form, or graphics

(image/library data), in accordance with changes in bit memory table sta­tuses.

For the alarm list, a series of bit memory tables are monitored, and messages
(contents of character string memory tables) set for bit memory tables that
come ON are displayed.

For the alarm history, bit memory tables for which the history property is set
are continually monitored, and the time when they come ON and number of
times they come ON are recorded and displayed together with the message
(character string) set for the bit memory table.

The NT631/NT631C allows selection of the display order as the newest
record first or the oldest record first by memory switch setting.

The alarm list function is used to determine which bits are ON at the present
time. The alarm history function is used to determine the times at which
alarms occurred in the past and how many times alarms have occurred

Alarm List

Alarm History

Recipe You can set several words of numeric data at the PT in tabular format, and

write it to the host. You can also read several words of numeric data from the
host and display it on the PT screen.

1-3 System Configuration

This section shows the configuration of a system that uses an NT631/
NT631C. For details on product models, refer to Appendix J Model List
(page 281).

0

1

0

Bit

A000000
L001003
D010015

1(ON)

No.13

No.14

No.15

Character string table No. 32

HOST

Message (character string table No. 32)
set for bit memory table No. 14

Image/library
data 113C

When the message displayed is pressed, the image/library
data (113C) set for bit memory table No. 14 is displayed.

Character string table No. 50
Image/library data 1002

Character string table No. 32
Image/library data 113C

Character string table No. 54
Image/library data 1125

No. 22

No. 23

No. 24

Recorded data

Character string table No. 13

Character string table No. 12

Message (character string table No. 13)
set for bit memory table No. 24

When the upper message displayed is pressed, the image/library
data (102B) set for bit memory table No. 13 is displayed.

Image/library
data 102B

Character string table No. 11
Image/library data 005F

Character string table No. 12
Image/library data 102A

Character string table No. 13
Image/library data 102B

Bit memory table No. 24
97/12/04 11:19:20

Bit memory table No. 23
97/12/04 11:25:12

17

System Configuration Section 1-3

1-3-1 Peripheral Devices That Can Be Connected

The following peripheral devices can be connected to an NT631/NT631C.

• Bar code reader (page 36)

• Recommended printers (page 36)

It is also possible to use printers that can emulate an NEC PC-PR201H
(using the NEC PC-PR201PL control protocol), and printers that comply
with one of the following EPSON control standards: ESC/P 24-J83C (col­or), or ESC/P 24-J82 (monochrome).

• Memory Unit (page 39)

• NT-MF261 (made by OMRON)

• Support Tool (page 35)

NT-series Support Tool Version 4.@ for Windows (Made by OMRON)

• NT-ZJCAT1-EV4 (CD-ROM version)

• System installer (page 35)

• System installer (made by OMRON)

The system installer is supplied as a standard accessory with the Support
Tool (NT-ZJCAT1-EV4).

Reference: The following optional devices are available. All of them can be used either

with NT631 or NT631C.

Anti-reflective Protective NT610C-KBA04
Sheet (5 pcs/set)

Chemical-resistant Cover NT625-KBA01

Replacement Battery 3G2A9-BAT08

Host

Memory link: Can be connected to a personal computer, FA computer, etc.

Other companies' PLCs can also be connected.

Bar code reader

Printer

Personal computer

Running Windows 95/98/NT

Support Tool

System installer

Memory unit NT631/NT631C

Controls the NT631/NT631C as required while controlling machines and
monitoring the production line.

Host Link: CS/CJ-series, C-series, and CVM1/CV-series PLC, and SRM1
Can be connected to CPU Units, Host Link Units, and SRM1.

However, connection is not possible to some models of CPU
Unit and SRM1.

NT link: CS/CJ-series, C-series, and CVM1/CV-series PLC, and SRM1
Can be connected to CPU Units and SRM1. However,

connection is not possible to some models.

Used to create screens for the
NT631/NT631C at the personal
computer and transmit them to
the NT631/NT631C, and to
make NT631/NT631C settings.

Used to change the system
program of the NT631/NT631C.

Displays production line monitoring and
instructions to the operation site, and
notifies the host of the switch ON/OFF
status and numeric value inputs.
When a 1:N NT Link is being used, up
to 8 PTs can be connected to a single
PLC.

Can store screen data
and system program to
be read out
automatically at
startup.

For printing out the
currently displayed
NT631/NT631C screen.

RS-232C cable
(max. 15 m) or
RS-422A/485 cable
(max. 500 m)

Bar codes can be read
as character strings.

18

Communications with the Host Section 1-4

1-3-2 Connecting to the Host

The NT631/NT631C has the following two communications ports.
The serial port B is equipped with an RS-232C connector and an RS-422A/
485 terminal block (selectable by memory switch).

Serial Port A:

D-SUB 9-pin connector

For RS-232C use only (The Support Tool and bar code readers can be con­nected here.)

Serial Port B:

D-SUB 9-pin connector for RS-232C use only (The Support Tool and bar code
readers can be connected here) or Terminal block for RS-422A/485 use only.

The host can be connected at either of these two ports.

The connection methods for each communications method at the PT and host
sides are indicated below. Make the settings in accordance with the communi­cations method that can be used with the PLC to be connected and the condi­tions at the operation site.

Reference: When using an RS-232C/422A adapter (NT-AL001) with the host link or NT

link (1:1) communications method, RS-485 cannot be used. The connection
must be made with RS-232C or RS-422A.

1-4 Communications with the Host

The NT631/NT631C is connected to the host by one of the following commu­nications methods.

The following communications can be used to connect an OMRON PLC:

• Host Link

• 1:1 NT Link

• 1:N NT Link (standard or high-speed)

The following communications can be used to connect another companies’
PLC or FA computer:

• Communications protocol supported by the other company’s PLC

• Memory link

In all of these communications methods that can be used with NT631/
NT631C, data communications with host are by direct connection (Memory
link is, however, a quasi-direct connection).

In the following, the host link and NT link that carry out the direct connection
will be discussed. Memory link will be explained in 1-5 Communications Using
Memory Links.

1-4-1 Direct Connection Function

With the NT631/NT631C, the bits and words referring to data required for dis­play, and those for storing input data, can be allocated to any part of the PLC
memory area.

The NT631/NT631C can directly write to and read from such allocated bits
and words to change the display status of the elements on the PT screen,
control the PT operating status, and notify the host of the status.

This function, which directly reads and writes the statuses of words and bits
without using a PLC program is called the direct connection function.

19

Communications with the Host Section 1-4

The words and bits allocated for direct connection are called the allocated
words and allocated bits.

The direct connection function allows the data to be displayed at the NT631/
NT631C to be read from the memory area in the PLC and written to memory
tables in the NT631/NT631C. Also, the data input at the NT631/NT631C can
be written to the memory area in the PLC. The NT631/NT631C screen can be
changed in accordance with statuses in the PLC memory area, and the
NT631/NT631C’s status data can be written to the PLC’s memory area.

Features of the Direct
Connection Function

The direct connection function has the following features.

• The bits and words referring to operating status and work instruction infor­mation and those for storing input data can be freely allocated to almost
any area of the PLC memory.

• Since the NT631/NT631C can directly refer to PLC bit and word data with­out using the program at the PLC, it can be connected to the PLC without
changing the PLC program which controls the currently running produc­tion line.

• The area to control and provide notification of the NT631/NT631C status,
including display screens, display/no display status, and buzzer output,
can be freely allocated to any part of the PLC data area. This means that
the PLC status can be read and controlled just by reading this area at the
PLC side, without preparing a special communications program.

The direct connection function allows the NT631/NT631C to directly read and
write almost all bits and words in the PLC and to automatically change the
NT631/NT631C screen display. This function can reduce the load on the PLC
so that its program development efficiency is improved.

1-4-2 Host Link

The host is connected to a PT in a 1:1 connection, and the words and bits of
the host are read and displayed by host link communications. This method
can be used for connection to the majority of PLC types.

1-4-3 NT Link

NT link is a method for high-speed communications with a PLC using the
direct connection function. The PLCs that can be connected with the NT link
are as follows.

CPM1, CPM2A, CPM2C, CQM1, CQM1H, C200HS, C200HX/HG/
HE(-Z)E, CS1G/CS1H-E(V1), CS1D, CJ1G/CJ1H/CJ1M, CVM1/CV-series
PLC (-EV1 or later version), SRM1

Besides the 1:1 NT link method, in which one PLC is connected to one PT, the
NT631/NT631C can also use the 1:N connection NT link method, which
allows a maximum of eight PTs to be connected to one PLC port.

PLCs that can be connected with the 1:N connection NT Link method are as
follows: CQM1H, C200HX/HG/HE(-Z)E, CS1G/CS1H-E(V1), CS1D, CJ1G/
CJ1H/CJ1M.

PLC

NT631/NT631C

DM area I/O relay area

Auxiliary relay area Timers/counters

20

Communications with the Host Section 1-4

The NT631/NT631C also supports OMRON’s high-speed 1:N NT Link that
provides faster 1:N communications. The only PLCs that support the high­speed 1:N NT Link are CS1G/CS1H PLCs of version -EV1 and higher, CS1D
PLCs, and CJ1G/CJ1H/CJ1M PLCs.

In the following sections, the term NT Link is used to refer to the NT Link com­munications method in general, the term 1:1 NT Link is used to refer specifi­cally to NT Links with a 1:1 connection, and the term 1:N NT Link is used to
refer to both standard and high speed NT Links with 1:N connections. When
necessary, the standard 1:N NT Link is distinguished from the high-speed 1:N
NT Link.

Features of the NT Link The NT link has the following features.

• High-speed communications with specific types of PLCs can be executed.
The NT631/NT631C also supports OMRON’s high-speed 1:N NT Link.

• Writing in units of bits to the PLC memory area is possible.

This enables the other bits of words to which a touch switch has been al­located to be allocated for other purposes (e.g. a lamp).

However, since data is written to the DM area in word units, the other bits
of words allocated to touch switches in this area cannot be used for other
purposes.

• The NT link can be used even when the PLC is in the RUN mode. (When
the host link method is used, the NT631/NT631C switches to the monitor
mode when the PLC is in the RUN mode.)

• In the case of PTs that support the standard 1:N NT Link (NT20S, NT31,
NT31C, NT600S, NT620S, NT620C, NT625C, NT631, NT631C) up to 8
PTs can be connected to one port of the PLC and used at the same time.
Up to 8 PTs (NT31, NT31C, NT631, and NT631C) can also be connected
simultaneously when the high-speed 1:N NT Link is being used.
All of the PTs connected to a PLC port must use either the standard or
high-speed 1:N NT Link; the two communications systems cannot share a
single port.

• When using a C200HX/HG/HE(-Z)E PLC and standard 1:N NT Links, up
to three 1:N NT Link systems (i.e., 24 PTs) can be connected by installing
a Communications Board in the option slot of the CPU Unit. (Only the
standard 1:N NT Link can be used.) For details on the Communications
Board, refer to the SYSMAC Communications Board Operation Manual
(W304-E1-@).

• When using a CQM1H PLC and standard 1:N NT Links, multiple 1:N NT
Link systems can be connected by installing Serial Communications
Boards in the Inner Board slots. For details on the Serial Communications
Board, refer to the CQM1H Serial Communications Board Operation Man-
ual (W365-E1-@).

• Multiple 1:N NT Link systems (standard or high-speed) can be connected
by installing a Communications Board in the Inner Board slot of the CPU
Unit for a CS1G/H/D PLC or installing a Serial Communications Unit on
the Backplane for a CS1G/H/D or a CJ1G/M/H PLC. For details on the
Communications Board/Communications Unit, refer to the CS/CJ-series
Serial Communications Board/Unit Operation Manual (W336-E1-@).

• If the PLC supports the Programming Console function, the NT631/
NT631C can be used as a Programming Console.

• If the PLC supports the Device Monitor function, the NT631/NT631C can
be used to change the PLC’s operating mode and read/change data in the
PLC’s memory areas.

21

Communications Using Memory Links Section 1-5

The NT link is compatible with the host link. The NT631/NT631C screen data
and PLC programs used with the host link direct connection method can be
used with the NT link method as they are.

1-4-4 Connecting to Other Companies’ PLCs

Installing a system program for multi-venders by using a specific system
installer enables the NT631/NT631C to be connected to the PLCs of other
models in direct connection. This system installer is supplied with the Support
Tool (NT-ZJCAT1-EV4).

Compatible PLC The NT631/NT631C can be connected to the following model PLCs.

• Mitsubishi A-series programmable controller (computer link module)

• Mitsubishi FX-series programmable controller

• SLC 500 Series by Allen-Bradley

• 90-20 and 90-30 Series by GE Fanuc

• S7-300 and S7-400 Series by Siemens

For details on the procedure for connecting to other model PLCs, refer to the
PLC Connection Manual or NT31/631 Multi Vendor Connection Manual.

1-5 Communications Using Memory Links

In this section, a communications method other than the direct connection,
called the memory link, is discussed.

1-5-1 Memory Link

Memory link is a method to send and receive data between a personal com­puter or a FA computer and the NT631/NT631C by using RS-232C/422A
communications.

In memory link, there is an area called PT Memory, as shown below, inside
the NT631/NT631C, and this area is treated as a virtual area on the PLC. This
allows PT memory and the display elements of the NT631/NT631C to make a
quasi-direct connection. By sending a command for the memory link, the host
can make the NT631/NT631C execute processes through PT memory. Fre­quently used commands are kept handy for read and write tasks of the
numeral memory table, character-string memory table, and bit memory table.

In the memory link method, the only difference is that the NT631/NT631C
finds its communications target inside instead of outside. In the memory link
method, therefore, change of the target is all that is needed to be capable of
using the exact screen data that is acquired by the direct connection. (With
the NT631/NT631C, the Support Tool must be used to convert the data to
screen data for the memory link.)

When compared to the direct connection of the host link or NT link methods,
the memory link method has some restrictions regarding the use of some
functions, as described below.

Lamp

PT memory

PT

Direct connection

RS-232C/422A
communications

Numeral
memory
table

22

Communications Using Memory Links Section 1-5

• The Programming Console and Device Monitor functions cannot be used.

• The following strobes of PT status notify bits do not turn ON (pages 7 to

27).

• Screen switching strobe

• Numerals input strobe

• Character-string input strobe

• The usable area for allocation is the PT memory only.

1-5-2 Comparison between Direct Connection and Memory Link

The major differences between the direct connection and the memory link are
as follows:

1,2,3... 1. In the memory link method, the communications with the host should be

carried out by using commands. Compared to the ordinal direct connec­tion, which can be used requiring almost no programs, the memory link
method requires a program that is necessary for interchange of com­mands.
This, however, gives advantages to the memory link method by using a
large variety of functions available in the direct connections from major
models such as a personal computer and a FA computer equipped with
RS-232C/RS-422A communications means, allowing the PT to be suited
for larger usage.

2. Actual PLCs have many kinds of areas, where as PT memory is a single
area with only one kind. When creating screen data by using the memory
link methods, it is always necessary to allocate display parts in the PT
memory.

For communications between the host and the PT by the memory link method
and for handling screen display elements, refer to the NT31/NT31C/NT631/
NT631C Programmable Terminal Reference Manual.

1-5-3 Memory Link Online Transfer Function

When memory link communications are being used, the NT631/NT631C can
be switched to Transmit mode from the host even if the NT631/NT631C is
operating and screen data can be written. (The NT631/NT631C can be
returned to RUN mode after the screen data is written.)

The memory link online transfer function can be used to replace screen data
at a fixed time each day or replace screen data with maintenance screen data
for maintenance.

For more details on the memory link online transfer function, refer to informa-
tion on the memory link online transfer function in the NT31/NT31C/NT631/
NT631C Programmable Terminal Reference Manual.

23

Before Operating Section 1-6

1-6 Before Operating

Follow the procedure given below to start the system of the NT631/NT631C.

*1

System program installation is only done in special circumstances, for
example when changing the system program, or to recover the original sta­tus of the installed program. This operation is not normally necessary.
When using other PLC models (sequencers), however, it is necessary to
install specific system programs.

*2

Display of the system menu, and all change operations, can be inhibited.
This enables you to prevent the accidental deletion or alteration of screens
and settings.

Reference: • For the system program, use the NT631/NT631C system program sup-

plied as an accessory with the NT-series Support Tool (NT-ZJCAT1-EV4).

• For the Support Tool, use NT-series Support Tool for Windows (Ver. 4.@).

Refer to the following manuals for the devices and software.

Host

Set the host settings.

Create the host program.

Start operation.

NT631/NT631C

Connect the power supply.

Install the system program.

*1

Transmit the screen data.

Set the memory switches.

Connect to the host.

When RS-232C used at the PT: refer to section 4
When RS-422A/485 used at the PT: refer to section 5

Support Tool

Create the screens.

Connect to the
NT631/NT631C.

Confirm the settings and
check communications.

Make the settings in the
system installer mode.

*2

Install the PT in the
operation panel.

Install the Support
Tool at the computer.

(Refer to the manual for
the Support Tool.)

(Refer to the NT31/NT31C/NT631/NT631C

Programmable Terminal Reference Manual

and the Support Tool Operation Manual.)

• For the host link, refer to
pages 48 and 94, and the
manuals for the Host Link
Unit and Programming
Devices.

• For the NT link (1:1), refer
to pages 61 and 106.

• For the NT link (1:N), refer
to pages 65 and 108.

• For the high-speed NT
link (1:N), refer to pages
70 and 112.

• For the Memory link, refer
to pages 73 and 114.

(page 32)

(page 33)

(page 144)

(Refer to page 145 and the
Support Tool manual)

(page 152)

(page 149)

Device or Software Manual Title Manual Number

NT31/NT31C, NT631/
NT631C

Reference Manual V064-E1-1

System Installer NT-series Support Tool for Windows (Ver. 4.@) Operation Manual V061-E1-@
Support Tool NT-series Support Tool for Windows (Ver. 4.@) Operation Manual V061-E1-@

24

Before Operating Section 1-6

PLCs SYSMAC CPM1 Operation Manual W262-E1-@

SYSMAC CPM1A Operation Manual W317-E1-@
SYSMAC CPM2A Operation Manual W352-E1-@

SYSMAC CPM1/CPM1A/CAM2A/CPM2C/SRM1(-V2)
Programmable Controllers Programming Manual

W353-E1-@

SYSMAC CPM2C Operation Manual W356-E1-@
SYSMAC C200H Operation Manual (for CPU01/03/11) (programming) W130-E1-@
SYSMAC C200H Operation Manual (for CPU21/23/31) (programming) W217-E1-@
SYSMAC C200HS Installation Guide W236-E1-@
SYSMAC C200HS Operation Manual (programming) W235-E1-@
SYSMAC C200HX/HG/HE-ZE Installation Guide W302-E1-@
SYSMAC C200HX/HG/HE Programming Manual W303-E1-@
SYSMAC C200HX/HG/HE-Z Programming Manual W322-E1-@
SYSMAC C1000H/C2000H Operation Manual (programming) W140-E1-@
SYSMAC CQM1 Programming Manual W228-E1-@
SYSMAC CQM1H Operation Manual W363-E1-@

SYSMAC CVM1/CV500/CV1000/CV2000 Operation Manual:
Ladder Diagrams

W202-E1-@

SYSMAC CS Series Programmable Controllers Operation Manual W339-E1-@
SYSMAC CJ Series Programmable Controllers Operation Manual W393-E1-@

SYSMAC CS Series, CJ Series, NSJ Series Programmable Controllers
Programming Manual

W394-E1-@

SYSMAC CS Series, CJ Series, NSJ Series Programmable Controllers
Operation Manual

W340-E1-@

SYSMAC CS/CJ Series Programming Consoles Operation Manual W341-E1-@

SYSMAC CS/CJ/CP Series, NSJ Series Communications Commands
Reference Manual

W342-E1-@

SYSMAC CS/CJ Series Serial Communications Boards,
Serial Communications Units Operation Manual

W336-E1-@

SYSMAC CQM1H Series Serial Communications Board Operation
Manual

W365-E1-@

CompoBus Master
Control Unit

SRM1 Operation Manual W318-E1-@

Programming Devices SYSMAC Support Software Operation Manual: C-series PLCs W248-E1-@

SYSMAC Support Software Operation Manual: CVM1 PLCs W249-E1-@
SYSMAC CPT User Manual and Quick Start Guide W332-E1-@

W333-E1-@

CX-Programmer Operation Manual W446-E1-@

Host Link Units and
Serial Communications
Boards

SYSMAC C-series Host Link Unit Operation Manual W143-E1-@
SYSMAC CVM1/CV-series Host Link Operation Manual W205-E1-@

SYSMAC C200HW-COM01 C200HW-COM02-V1 to C200HW-COM06­EV1 Serial Communications Board Operation Manual

W304-E1-@

Device or Software Manual Title Manual Number

25

SECTION 2

Preparing for Connection

This section describes the connection methods that are possible with the PT, and the functions of the parts of PT, as the
required knowledge before connecting to the host and to the peripheral devices.

2-1 Method for Connection to the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

2-2 Names and Functions of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

26

Method for Connection to the Host Section 2-1

2-1 Method for Connection to the Host

This section describes the methods for connection to the host used with the
NT631/NT631C, and the relationship between the connection method and the
communications method.

NT631/NT631C Communications Ports and Communications Methods

The NT631/NT631C has two communications ports. Their uses are indicated
in the table below.

Note There are two NT Link (1:N) communications rates: standard and high-speed.

Communications Methods That Can Be Used with the Host

The following communications methods can be used with the hosts that can
be connected to the NT631/NT631C.

• RS-232C

• RS-422A

•RS-485

The communications types that are actually supported differ depending on the
host. For details, refer to SECTION 4 Connecting to the Host from the RS-

232C Port and SECTION 5 Connecting to the Host from the RS-422A/485
Por t.

Converting the Communications Type with an RS-232C/RS-422A Adapter

The following communications type conversions are possible by using an RS­232C/RS-422A adapter (NT-AL001, made by OMRON).

• RS-232C

⇔ RS-422A

• RS-232C

⇔ RS-485

Communications Port Usable Communications

Methods

Communications Type

Serial port A Host link

NT Link (1:1)
NT Link (1:N) (See note.)
Memory link
(Support Tool connection)
(bar code reader input function)

RS-232C

Serial port BConnector Host link

NT Link (1:1)
NT Link (1:N) (See note.)
Memory link

RS-232C
(select between con-

nector and terminal
block)

Te r mi n al
block

Host link
NT Link (1:1)
NT Link (1:N) (See note.)

RS-422A/485
(select between con-

nector and terminal
block)

27

Method for Connection to the Host Section 2-1

Combinations of Communications Method and Connection Method

The connection methods that can be used depending on the communications
method used and the communications type for communications between the
NT631/NT631C and the host are indicated in the table below.

❍: Connection possible

×: Connection not possible

Communica­tions Type at

PT

Communica­tions Type at

Host

Usable Connection Method Usable Communications

Method

Details

Host

link

NT
Link
(1:1)

NT

Link

(1:N)

Mem-

ory
link

RS-232C RS-232C ❍❍❍❍ page 73

RS-422A RS-232C ❍❍❍❍ page 82

××❍ × page 86

RS-422A ❍❍❍❍ page 115

××❍ × page 119

Direct 1:1 connection

PT

Host

RS-232C (max. 15 m)

1:1 connection via a convertor unit

PT Host

Convertor unit
(NT-AL001)

RS-422A

(

max. 500 m

)

RS-232C
(max. 2 m)

1:N connection via a convertor unit

PT

Host

Convertor unit
(NT-AL001)

RS-422A
(total length 500 m)

RS-232C
(max. 2 m)

Direct 1:1 connection

PT Host

RS-422A (max. 500 m)

1:N connection

PT

Host

RS-422A (total length 500 m)

28

Method for Connection to the Host Section 2-1

❍: Connection possible ×: Connection not possible

• The RS-232C/RS-422A adapter (NT-AL001) requires +5 V, 150 mA at pin
6 of the RS-232C connector. Check the signals of the RS-232C connector
at the host.

• +5 V is not output from serial port B of the NT631/NT631C. When con­necting an NT-AL001 at serial port B, a separate power supply is required
for the NT-AL001.

• The cable of an NT-AL001 cannot be connected or disconnected while the
power is ON. Always connect or disconnect the cable while the power
supply from the RS-232C cable is OFF (while the host power supply is
OFF).

• NT Link (1:N) connection is possible even when RS-232C is used at the
NT631/NT631C side for communications with the host, but in this case
one NT-AL001 Adapter is required for each NT631/NT631C. In this case,
it is convenient to use serial port A of the NT631/NT631C. +5 V is not out­put from serial port B.

Communica-

tions Type at

PT

Communica-

tions Type at

Host

Usable Connection Method Usable Communications

Method

Details

Host

link

NT
Link
(1:1)

NT
Link
(1:N)

Mem-

ory

link

RS-485 RS-232C ××❍ × page 82

××❍ × page 86

RS-485 ××❍ × page 118

××❍ × page 121

1:1 connection via a convertor unit

PT

Host

Convertor unit
(NT-AL001)

RS-485
(max. 500 m)

RS-232C
(max. 2 m)

1:N connection via a convertor unit

PT

Host

Convertor unit
(NT-AL001)

RS-485
(total length 500 m)

RS-232C
(max. 2 m)

Direct 1:1 connection

PT

Host

RS-485

(

max. 500 m

)

1:N connection

PT

Host

RS-485 (total length 500 m)

29

Names and Functions of Parts Section 2-2

2-2 Names and Functions of Parts

Before starting operation, the names and functions of the parts of the NT631/
NT631C are described here as a confirmation. A method of hardware settings
is also described.

Front View

Reference: The NT631/NT631C comes in two body colors.

NT631 (EL) NT631C (STN) NT631C (TFT) Body Color

NT631-ST211-EV2 NT631C-ST141-EV2 NT631C-ST153-EV3 Beige

NT631-ST211B-EV2 NT631C-ST141B-EV2 NT631C-ST153B-EV3 Black

POWER

RUN

POWER LED
Lit in green when the power is supplied.

RUN LED Display

Depending on the model, different display types are used.

• NT631-ST211@-EV2: Monochrome EL display

• NT631C-ST141@-EV2: STN color LCD display with backlight

• NT631C-ST151/152@-EV2: TFT color LCD high intensity display with backlight

The whole area of the screen is a touch panel which works as an input device.

• Lit in green while the

unit is in the RUN mode.

• Lit in orange or red when

the battery is low (orange
in the RUN mode, red in
other modes).

30

Names and Functions of Parts Section 2-2

Rear View

Note Confirm system safety before turning the power ON/OFF or resetting.

RDA

TRM

RDB

SDA

SDB

RSA

RSB

24V
+DC

PRINTER PORT B PORT A

RESET

Warning label

Reset switch (inside the cover)
Used to initializes all the statuses of the NT631/NT631C.
However, registered data such as screen data, and memory
switch settings, retain their statuses before initialization.

Serial port B terminal block
Connect the cable for RS­422A/485 connection to the host
here. Depending on the setting
made at the NT631/NT631C
system menu, communications
through RS-422A/485 are
available. It is not possible to use
this terminal block and the serial
port B connector (9-pin) at the
same time.

GR terminal
Grounding terminal to prevent
malfunction due to noise.

Power input terminals
Connect the power to
the NT631/NT631C at
these terminals.

Battery cover
The battery is secured
underneath this cover.

Serial port A connector
Connect the cable for connection to the host or
Support Tool here. A bar code reader can also
be connected here. This is a 9-pin connector for
RS-232C use only.

Serial port B connector
Connect the cable for RS-232C connection to the host here.
Depending on the setting made at the NT631/NT631C
system menu, communications through RS-232C are
available. This is a 9-pin connector for RS-232C use only.It is
not possible to use this connector and the serial port B
terminal block at the same time.

Printer connector
Connect the printer cable here.
Output conforms to Centronics
specifications.

Expansion interface connector
(under the label)
When using an expansion
interface unit such as a
memory unit, peel off the label
and connect it here.

31

SECTION 3

Hardware Settings and Connections

This section describes the settings of the NT631/NT631C and methods for connection to peripheral devices.

For details on the method for connection to the host, refer to SECTION 4 Connecting to the Host from the RS-232C
Port or SECTION 5 Connecting to the Host from the RS-422A/485 Port.

3-1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3-1-1 Installation Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3-1-2 Installation in the Operation Panel . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3-1-3 Power Supply Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3-1-4 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3-2 Connecting to the Support Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

3-3 Connecting a Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3-3-1 Connection Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3-4 Connecting a Bar Code Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3-4-1 Connection Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3-4-2 Setting a Bar Code Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3-4-3 Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3-5 Using a Memory Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

3-5-1 Installation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

3-5-2 Method of Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

32

Installation Section 3-1

Note On unpacking the NT631/NT631C and peripheral devices, check their exter-

nal appearance and confirm that there is no damage. Also confirm that there
is no abnormal noise on shaking the PT lightly.

3-1 Installation

Install the NT631/NT631C in the operation panel and connect the power to
the NT631/NT631C as described below.

3-1-1 Installation Environment

Observe the following points when installing the PT in an operation panel.

Note 1. Do not install the PT at sites subject to the following conditions.

• Severe temperature variations

• Temperatures or humidities outside the ranges stated in the specifica­tions

• High humidity, condensation

• Splashing chemical agents

• Severe oil splashing

• Corrosive or flammable gases

• Strong vibrations or shocks

• Direct exposure to wind and rain (outdoor sites)

• Strong ultra-violet irradiation

2. Take adequate measures to ensure shielding if the PT is used at a location
subject to any of the following conditions.

• Static electricity, or noise from other equipment

• Strong electromagnetic fields

• Nearby power cables

• Potential exposure to radioactivity

3-1-2 Installation in the Operation Panel

The NT631/NT631C is mounted in an operation panel by embedding it in the
panel.

Use the panel fittings and tool (Phillips screwdriver) included in the product
package and follow the procedure below.

1,2,3... 1. Open a hole of the dimensions shown below in the panel and install the

NT631/NT631C from the front side of the panel.

2. Attach the panel fittings at the following positions shown below, from the
rear of the NT631/NT631C.

Fit the hook of the fitting in the square hole in the body and tighten the
screw with the Phillips head screwdriver while lightly pulling the fitting.

238

+ 0.5 mm

0 mm

303

+ 0.5 mm

0 mm

33

Installation Section 3-1

Fittings at the two (*) positions are not necessary if you do not need it dust
proof and waterproof.

Note 1. During work at the panel, take care to ensure that no metal scraps enter

the PT.

2. The thickness of applicable operation panel is 1.6 mm to 4.8 mm. All fit­tings must be tightened uniformly to a torque of 0.5 to 0.6 N

⋅m in order to

ensure water- and dust-resistance. Front sheet of NT631/NT631C may be
warped if the tightening is too strong or not uniformity. The panel must not
be soiled or warped, and must be able to support an installation that will
remain secure and strong.

3-1-3 Power Supply Connection

Connect a 24 VDC power supply to the power input terminals.

Note 1. Depending on how the power is switched ON/OFF, the entire system may

stop. Follow the correct procedure when switching the power ON/OFF.

2. Carefully check the wiring before switching ON the power.

3. Do not connect AC power to the DC terminals.

4. Use DC power supplies with low voltage fluctuation.

5. Do not perform a dielectric strength test.

6. If complying with EC directives (low voltage directives), the following points
must be noted (compliance with EC directives):

a. Use a power supply with reinforced insulation.

b. When installing NT631-ST211(B)-EV2 on the ultimate system, the

rear of the NT631 must be placed within an enclosure to restrict the
operators’ use only to the front panel.

7. When using NT631-ST211(B)-EV2, warm-up time of the power supply
must be 200 ms or less. If longer than this, NT631 may not boot up.

+DC

24V

PRINTER PORT B PORT A

RESET
RDA

TRM

RDB
SDA

SDB

CSA

CSB

(:)

(:)

24 VDC

Breaker

24 VDC

p

ower suppl

y

34

Installation Section 3-1

Power Supply

The applicable power supply specifications are as follows.

Parts Used for Connection

Note For the connection to the power supply terminal block, twisted wires of 2 mm

2

or greater cross sectional area and M3.5 size crimp terminals must be used.

Tighten the screws on the terminal block to a torque of 0.8 N

⋅m.

Recommended Terminals

Note Conformance to Shipbuilding Standard

• Cover the entire PT with electromagnetic shielding, and ground the elec­tromagnetic shielding to the control panel with copper tape or other elec­trically conductive tape.

Recommended electromagnetic shielding: E09F100 or E09R13502P

Manufacturer: Seiwa Electric MFG, Co., Ltd.

• Use gaskets or other materials to completely shield all openings and
other gaps in the control panel.

• Use copper tape or other electrically conductive tape to shield gaps
between the cutout and the PT before securing the PT in place.

• To suppress noise terminal voltage, perform installation under the follow­ing conditions. It is recommended to use the following product for the DC
power supply.
Recommended Power Supply model: S82K-03024
Manufacturer: OMRON

3-1-4 Grounding

The NT631/NT631C has a functional ground terminal ( ).

Carry out wiring under the following conditions.

Item Value

Power supply 24 VDC

Allowable power supply voltage
fluctuation range

20.4 to 26.4 VDC (24 VDC –15% to +10%)

Power supply voltage capacity NT631-ST211 (B)-EV2:

30 W or more (Power supply warm-up time
within 200 ms.)

NT631C-ST141 (B) /ST153 (B)-EV3:

18 W or more

Maker Type

(fork type)

Type

(round type)

Applicable Wire

(stranded wire)

Japan Solderless Terminal MFG 2-YS3A 2-3.5

2.0 to 2.63 mm

2

Fuji Terminal 2-YAS3.5 V2-S3.5

Nichifu Terminal 2Y-3.5 2-3.5

Fork type Round type

7 mm max. 7 mm max.

35

Connecting to the Support Tool Section 3-2

1,2,3... 1. In cases where there is a potential difference between the grounds of the

NT631/NT631C and the host, ground as shown in Fig. If there is some dis­tance between the NT631/NT631C and host and grounding at a single

point is difficult, do not connect the functional ground terminal ( ) of the
NT631/NT631C.

2. If the NT631/NT631C is installed in the same panel as equipment that gen­erates noise, such as a motor or inverter, do not ground the functional

ground terminal ( ) of the NT631/NT631C.

Note Carry out grounding correctly in order to prevent operating errors due to

noise.

3-2 Connecting to the Support Tool

In order to install the system program in the NT631/NT631C, or to transmit
screen data created with the Support Tool to the NT631/NT631C, the NT631/
NT631C must be connected to a personal computer with an RS-232C cable.

The NT631/NT631C connects the RS-232C cable from a personal computer
at serial port A. When the host is connected at serial port B, the connection
with the host can be maintained as it is while the NT631/NT631C is connected
to the RS-232C cable from a personal computer.

However, when a bar code reader is being used, it must be disconnected, so
that the RS-232C cable can be connected, since they both use serial port A.

Communications Conditions

The communications conditions are automatically set when the system
installer and Support Tool are started.

Recommended Connector Cable

Use the cable indicated below.

• CV500-CN228 (length: 2 m), made by OMRON
(D-SUB 9-pin, male

⇔ D-SUB 25-pin, male)

• XW2Z-S001 (conversion cable), made by OMRON
(D-SUB 25-pin, female

⇔ half pitch 14-pin, male)

• XW2Z-S002 (length: 2 m), made by OMRON
(D-SUB 9-pin, male

⇔ D-SUB 9-pin, female)

For details on making a connector cable, refer to Appendix F Making the
Cable for Connecting a PLC.

Host

Grounding at a single poin

t

NT631/
NT631C

+DC

RESET
RDA
TRM
RDB
SDA
SDB
CSA
CSB

24V

PRINTER PORT B PORT A

Serial port A
(RS-232C, 9-pin)

36

Connecting a Printer Section 3-3

3-3 Connecting a Printer

Connecting a printer to the NT631/NT631C enables printing of hard copies of
the currently displayed screen (printing of screen images), and, by system
menu operations, printing of the screen display history and alarm history.

The following types of data can be printed, depending on the printer con­nected to the NT631/NT631C. For details, refer to the pages cited.

• Hard copies of the screen (Refer to information on printing data and
checking the printer status in the NT31/NT31C/NT631/NT631C Program-
mable Terminal Reference Manual.)

• Screen display history record data (page 194)

• Alarm history record data (page 196)

3-3-1 Connection Method

Connect the printer to the NT631/NT631C with a Centronics cable, as shown
below. The length of the cable should not exceed 1.5 m.

Reference:

If the connector cable is connected or disconnected while the power to the
printer is on, the NT631/NT631C may malfunction. Always turn off the power
to the printer before connecting or disconnecting the cable.

Recommended Connector Cable

The following connection cables are recommended.

NT-CNT121 (1.5 m, 20-pin to 36-pin), made by OMRON

Recommended Printers

When using a printer, use one that can emulate an NEC PC-PR201H (us­ing the NEC PC-PR201PL control protocol) or complies with one of the fol­lowing EPSON control standards: ESC/P 24-J83C (color), or ESC/P 24­J82 (monochrome).

When using a monochrome printer with an NT631C, set Tone printing with
the NT631C memory switches (page 169).

3-4 Connecting a Bar Code Reader

Connecting a bar code reader to the NT631/NT631C enables bar code data
to read as character strings into character string input fields, and set in char­acter string memory tables.

In order to use a bar code reader, the Comm. A Method memory switch must
be set to Bar-Code Reader.

For details on the method for inputting character strings with a bar code
reader, refer to 3-7 Input of Numeric values and Character Strings in the

NT31/NT31C/NT631/NT631C Programmable Terminal Reference Manual.

+DC

RESET
RDA
TRM
RDB
SDA
SDB
CSA
CSB

24V

PRINTER PORT B PORT A

37

Connecting a Bar Code Reader Section 3-4

Note Make sure that the power supply to the bar code reader and the power supply

to the PT are both OFF before connecting or disconnecting the cable.

3-4-1 Connection Method

Connect the bar code reader to serial port A of the NT631/NT631C, as shown
in the figure below.

Bar code reader must match the communications setting (3-4-2 Setting a Bar
Code Reader, page 37) and data format (3-4-3 Data Format, page 38) in
order to connect to the NT631/NT631C. Please confirm the specification of
the bar code reader before using.

For details on making a connector cable, refer to Appendix G Making the
Cable for Connection to a Bar Code Reader.

Reference: The bar code reader must be connected to serial port A. This means that it

cannot be connected at the same time as the Support Tool. Note also that
when a bar code reader is used, the host must be connected at serial port B.

3-4-2 Setting a Bar Code Reader

After connecting a bar code reader, set the communications conditions and
other settings for it by selection from the system menu.

Settings at the NT631/
NT631C

At the NT631/NT631C, set the communications conditions for communica­tions with the bar code reader by using the memory switches, selecting from
the options indicated in the table below.

For more detailed information on the actual system menu operations, refer to
6-10 Setting the Bar Code Reader Input Function.

Settings at the Bar Code
Reader

Make the settings shown in the table below at the bar code reader. Make sure
that the communications speed, parity, stop bit, and data bit settings match
the communications settings made at the NT631/NT631C. For details on the

setting method, refer to the instruction manual for the bar code reader used.

+DC

RESET
RDA
TRM
RDB
SDA
SDB
CSA
CSB

24V

PRINTER PORT B PORT A

NT631/NT631C

Bar code reader

9-pin connector

Connector cable Bar code reader cable

Serial port A
(RS-232C, 9-pin)

Item Possible Settings Default Setting

Data bits 7 or 8 bits 7 bits

Stop bit(s) 1 or 2 bits 2 bits

Parity None, odd, even Even

Communications speed 4800, 9600, 19200 bps 9600 bps

Input Method Manual, Auto Manual

Item Possible Settings

Communications speed 4800, 9600, 19200 bps

Parity EVEN, ODD, NONE

Stop bits 1 or 2 bits

Data bits 7 or 8 bits

38

Connecting a Bar Code Reader Section 3-4

About RS/CS Control

During bar code reading, the NT631/NT631C performs RS/CS control. When
the Input Method setting of the NT631/NT631C is set to Auto, the RS signal is
turned OFF, prohibiting the next input, until the read data has been sent to the
host as notification.

Because of this, when the Auto setting is made, the next input is not possible
until the data has been sent to the host as notification.

However, when the setting is Auto and the RS/CS signals of the cable are
shorted, RS/CS control is ineffective. Consequently, data input from the bar
code reader to the NT631/NT631C is updated regardless of whether or not
the data is sent to the host as notification.

For details, refer to the instruction manual for the bar code reader used.

3-4-3 Data Format

The data format for communications when using the bar code input function of
the NT631/NT631C is shown below.

The characters which are effective as data are hexadecimal codes from 20 to
7FH, and the maximum data length is 40 bytes.

Data which does not follow the data format described above is invalidated and
discarded.

Preamble STX

Postamble ETX

RS/CS control Available

Communications protocol No-protocol mode

Transmission of number of bar code label digits Transmission prohibited

Transmission of ID characters Transmission prohibited

Bar code types Multi-reading (all types can be

read)

Trigger switch setting Automatic reading mode

Item Possible Settings

Data Data DataSTX ETX

(03

H)(02H)

39

Using a Memory Unit Section 3-5

3-5 Using a Memory Unit

This section discusses the use of the Memory Unit.

Reference: The Memory Unit functions are determined by the model of PT being used,

regardless of the version of the system program installed in the PT.

By installing a Memory Unit (NT-MF261) on the NT631/NT631C, the screen
data in the NT631/NT631C can be recorded (backed up) in the Memory Unit.

In addition, the screen data in the Memory Unit can be automatically read into
the NT631/NT631C when it starts up. This means that system program and
screen data can be changed easily at the operation site without connecting to
the Support Tool.

The data in the Memory Unit is retained without backup by a battery or other
means.

In systems where there are frequent setup changes, by preparing a number of
Memory Units in advance and recording screen data in them in accordance
with the control performed in each case, the NT631/NT631C screen data can
be changed simply by installing the Memory Unit, without connecting to the
Support Tool.

In addition, even if NT631/NT631C is replaced, the previous status can be
maintained simply by installing the Memory Unit that retains the system pro­gram and screen data of the previous NT631/NT631C.
By using the following combinations, data can be stored (backed up) to a
Memory Unit.

• Screen data for two PTs.

• System program for two PTs.

• System program and screen data for one PT.

One Memory Unit can store the screen data for two PTs.

Note 1. Make sure that the power supply to the PT is OFF before connecting or dis-

connecting a Memory Unit.
After mounting a Memory Unit, be sure to tighten its two screws.

2. During data transmission, do not turn off the power supply to the NT631/
NT631C or reset it.

3. Do not touch the PCB (printed circuit board) with bare hands.

Reference: • When a Memory Unit is mounted, the NT631/NT631C cannot be set to

the operating status. On completion of data transmission with a Memory
Unit, always disconnect the Memory Unit from the NT631/NT631C before
starting NT631/NT631C operation.

• Memory Units (NT-MF261) can be used in common for the following PT
models: NT31, NT31C, NT631, and NT631C. One Memory Unit can store
screen data for up to two PTs of different models. However, since the data
compatibility is not complete between NT31/NT31C and NT631/NT631C,
an error may occur if an attempt is made to read NT631C data with an
NT31C. (The data must be converted using the Support Tool.)

Note also that although there is data compatibility between the NT31
and NT31C, and between the NT631 and NT631C, the display may not
be correct since these models have different numbers of colors.

PT Model Function of Memory Unit

Without V@ suffix System programs can not be transmitted using Memory Unit.
With V@ suffix System programs can be transmitted using Memory Unit.

40

Using a Memory Unit Section 3-5

• One Memory Unit can store a system program for up to two PTs of differ­ent models. In order to transmit a system program from the Memory Unit
to the NT631/NT631C, the system program must be compatible to the tar­get PT model.

• The statuses of memory switch settings and system settings can be
recorded to the Memory Unit besides screen data. When the data in the
Memory Unit is written into the NT631/NT631C, make sure that these set­tings can be adapted to the NT631/NT631C used before transmission.

3-5-1 Installation Method

Install the Memory Unit (NT-MF261) at the expansion interface connector at
the rear of the NT631/NT631C as shown in the figure below (the expansion
interface connector is located underneath the note label.).

3-5-2 Method of Use

As shown in the figure below, a Memory Unit has two sets of four DIP
switches, and the operation is determined by the DIP switches that are set at
startup.

Note 1. Always confirm that the power to the NT631/NT631C is off before setting

the DIP switches.

2. Do not touch the PCB (printed circuit board) directly with bare hands.

DIP Switch Functions The functions of the DIP switches on the Memory Unit are indicated in the

table below.

SW1

Mounting screw

s

4321

OFF

SW1 SW2

OFF

4321

Factory setting is turned all to off.

Switch Function

SW1-1 Automatic transmission (writing from the Memory

Unit to the PT)

OFF: Not executed

ON: Executed

SW1-2 Automatic transmission (writing from the PT to the

Memory Unit)

OFF: Not executed

ON: Executed

41

Using a Memory Unit Section 3-5

SW2

*: The Memory Unit stores system program or screen data for one PT in each

of areas (bank 0, bank 1). (The total data storage is for two PTs.) SW2-3
sets which of these two banks is used for automatic transmission.

Reference: • In the following cases, a mode setting error occurs.

• More than one of the SW1-1 to SW1-3 switches are set to ON.

• None of the SW1-1 to SW1-3 switches are set to ON.

• In the following case, a protect setting error occurs.

Transmitting to the write destination has been disabled by the setting for
SW2-1 or SW2-2.

• In the following cases, a data transmission error occurs.

• An attempt is made to transmit data other than the system program to
PT system program area.

• An attempt is made to transmit the system program to PT screen data
area.

• For details on mode setting errors and protect setting errors, refer to
Errors When Using a Memory Unit (page 45).

Writing Screen Data to a
Memory Unit Using
Automatic Transmission
(PT to Memory Unit)

In this mode, system program or the screen data in the NT631/NT631C is
forcibly written to the Memory Unit irrespective of the setting status of the
NT631/NT631C.

This mode is convenient if the touch panel is broken and touch switch opera­tion is not possible, or if someone unfamiliar with touch switch operation at the
operation site is using the system.

Reference: When screen data is written to the Memory Unit, the data that has been

stored in the specified area up until that point is lost (if the data is written into
only one Bank, the other Bank will not be affected).

Method of Execution

Use the following procedure to write the screen data in the NT631/NT631C to
the Memory Unit by automatic transmission.

SW1-3 Manual transmission (Direction of transmission and

bank used selected at the PT touch panel)

OFF: Not executed

ON: Executed

SW1-4 Data type to transfer OFF: Screen data

ON: System program

Switch Function

SW2-1 Disable/enable writing to PT OFF: Disable

ON: Enable

SW2-2 Disable/enable writing to the Memory Unit OFF: Disable

ON: Enable

SW2-3 Area (bank) selection of automatic transmission. * OFF: Bank 0

ON: Bank 1

SW2-4 System/Screen simultaneous transmission OFF: Disable

ON: Enable

Switch Function

42

Using a Memory Unit Section 3-5

1,2,3... 1. Check that the power supply to the NT631/NT631C is OFF, then set the

DIP switches of the Memory Unit as follows after installing Memory Unit to
NT631/NT631C.

It is not strictly necessary to set SW2-1 to OFF (to disable writing to the
PT), but it is recommended to do so to avoid loss of data in the event of
operating errors.

Reference: • Setting SW2-4 to ON (System/Screen transmitted simultaneously) dis-

ables the setting of SW1-4.

• Setting SW2-4 to ON (System/Screen transmitted simultaneously) dis­ables the setting of SW2-3, writes the system program into bank 0, and
the screen data into bank 1 at all times.

2. Switch the NT631/NT631C power ON.

The screen data is automatically written into the Memory Unit. The screen
data in the NT631/NT631C is preserved.

The messages Preparing, Transmitting, Verifying, and Finished are dis­played on the screen in accordance with the progress of data writing.

At the same time, the progress of the data writing status is displayed by the
means of the number of bytes and blocks (1 bank = 16 block = 1024k byte).

RUN LED operates as follows according to the processing status.

Preparing: flashes at intervals of 1 second
Transmitting: flashes at intervals of 0.5 second
Verifying: flashes at intervals of 0.5 second
Finished: lights up

3. Switch the NT631/NT631C power OFF, remove the Memory Unit.

To operate NT631/NT631C continuously, switch the NT631/NT631C pow­er back ON.

Writing Screen Data to the
PT Using Automatic
Transmission (Memory
Unit to PT)

In this mode, the system program or screen data in the Memory Unit is forcibly
written to NT631/NT631C irrespective of the setting status of the NT631/
NT631C.

Since data transmission by this method is faster than when the Support Tool
or system installer is used, it can save a lot of time. When transmitting the
same system program or screen data to multiple NT631/NT631C, this mode
becomes convenient.

SW1

SW1-4 ON: System program

OFF: Screen data

SW2-3 ON: Bank 1

OFF: Bank 0

SW2-4 ON: System/Screen transmitted simultaneously

OFF: System/Screen not transmitted simultaneousl

y

SW2

43

Using a Memory Unit Section 3-5

Reference: When data is written to the NT631/NT631C, the data that has been stored up

until that point is lost. When the system program is changed, the operation of
NT631/NT631C also changes.

Method of Execution

Use the following procedure to write the screen data in the Memory Unit to the
NT631/NT631C by automatic transmission.

1,2,3... 1. Check that the NT631/NT631C power is OFF, then set the DIP switches on

the Memory Unit as follows after installing Memory Unit to NT631/NT631C.

It is not strictly necessary to set SW2-2 to OFF (to disable writing to the
Memory Unit), but it is recommended to do so to avoid loss of data in the
event of operating errors.

Reference: • Setting SW2-4 to ON (System/Screen transmitted simultaneously) dis-

ables the setting of SW1-4.

• Setting SW2-4 to ON (System/Screen transmitted simultaneously) dis­ables the setting of SW2-3. In this case, the data transmission becomes
possible only if the data inside Memory Unit is in either of following combi­nations.
Bank 0: system program, Bank 1: other than system program
Bank 0: other than system program, Bank 1: system program
If the combination is not as listed above, a data transmitting error occurs.

• When writing the system program into the NT631/NT631C, the type of
system program inside Memory Unit and the type of PT must correspond.

2. Switch the NT631/NT631C power ON.

The screen data is automatically written into the PT.

The messages Preparing, Transmitting, Verifying and Finished are dis­played on the screen in accordance with the progress of data writing.

At the same time, the progress of data writing status is displayed by the
means of the number of bytes and blocks (1 bank = 16 block = 1024k byte).

The RUN LED operates as follows according to the processing status.

Preparing: flashes at intervals of 1 second
Transmitting: flashes at intervals of 0.5 second
Verifying: flashes at intervals of 0.5 second
Finished: lights up

3. Switch the NT631/NT631C power OFF, remove the Memory Unit.

To operate NT631/NT631C continuously, switch the NT631/NT631C pow­er back ON.

Reading and Writing Data
by Manual Transmission

In this method, the direction of transmission and area of the Memory Unit
used are set by touch switch operations at the NT631/NT631C. Transmission
can be executed while checking the settings.

SW1

SW2-4 ON: System/Screen transmitted simultaneously

OFF: System/Screen not transmitted simultaneousl

y

SW2

SW1-4 ON: System program

OFF: Screen data

SW2-3 ON: Bank 1

OFF: Bank 0

44

Using a Memory Unit Section 3-5

Reference: When data is written to the NT631/NT631C or Memory Unit, the data that has

been stored up until that point is lost.

Method of Execution

Use the following procedure to write screen data using manual transmission.

1,2,3... 1. Check that the NT631/NT631C power is OFF, then set the DIP switches on

the Memory Unit as follows.

In order to avoid loss of data in the event of operating errors, it is advisable
to set SW2-1 and SW2-2 so as to disable writing to the PT from which the
data is to be read.

2. Switch the NT631/NT631C power ON.

Display language select screen appears.

3. Press the Japanese or English touch switches to select the display lan­guage.
The following descriptions are for when English is selected.
The screen shown below is displayed.

Current PT Screen Data, System

The first line: Compatible PT type for the system program inside PT.

The second line: System program name and Version for the system pro-

gram inside PT.

(The second line may not be displayed in the kind of system program.)

Current PT Screen Data, Screen

The comment for the screen data in the NT631/NT631C is displayed here.

SW1

SW2

Settin

g

of SW1-4 not relevant

Setting of SW2-3 not relevant

Setting of SW2-4 not relevan

t

45

Using a Memory Unit Section 3-5

Current Memory Unit Screen Data

• In the case of system program:

The first line: Compatible PT type for the system program in-

side the Memory Unit.

The second line: System program name and Version for the sys-

tem program inside the Memory Unit.

(The second line may not be displayed in the system program for some
models.)

• In the case of screen data:

The comment for the screen data in the NT631/NT631C is displayed
here.

The available transmitting destinations are altered depending on the settings
of the origin of transmitting as described in the table below.

Reference: • When transmitting the system program and screen data simultaneously

from the PT to the Memory Unit, the setting of banks is Bank 0: system
program, Bank 1: screen data, and when transmitting them from the
Memory Unit to the PT, either of the following combinations must be used.
Bank 0: system program, Bank 1: other than system program
Bank 0: other than system program, Bank 1: system program

• When writing the system program into the NT631/NT631C, the type of
system program inside Memory Unit and the type of PT must correspond.

4. Press Execute.

The data is transmitted.

The messages Preparing, Transmitting, Verifying, and Finished are dis­played in accordance with the progress of data transmission. At the same
time, the progress of data transmitting status is displayed by the means of
the number of bytes and blocks (1 bank = 16 block = 1024k byte).

When the data transmission is operated manually, RUN LED remains OFF.

5. Switch the NT631/NT631C power OFF, remove the Memory Unit, then
switch the NT631/NT631C power back ON.

Errors When Using a
Memory Unit

If an error occurs when using the Memory Unit, the NT631/NT631C operates
as follows.

• The details of the error and remedial action are displayed on the screen.

Each screen has touch switches to change the display language from
one to the other. When the manual data transmission is operating, the
content of error and remedial action are shown with selected lan­guage. When the automatic transmission is operating, it is displayed in
Japanese.

• The continuous buzzer sounds.

Source Destination

PT screen

PT system

PT system/screen Memory Unit Bank 0/1 (fixed)

Memory Unit Bank 0 If system program is selected

PT system (fixed)
If screen data is selected
PT screen (fixed)

Memory Unit Bank 1

Memory Unit Bank 0/1 PT system/screen (fixed)

Memory unit Bank 0

Memory unit Bank 1

46

Using a Memory Unit Section 3-5

• The RUN LED flashes.

If a protect setting error occurs when executing manual transmission, it is pos­sible to return to the Memory Unit manual transmission screen by pressing
the OK touch switch, but in the case of other errors, the status described
above remains in effect until the NT631/NT631C power is turned OFF or
reset.

Within the PT Model, the
system program inside
memory compatible PT
model

The compatibility relationships are shown below.

When an error occurs, take remedial action by referring to the table below.

NT631
NT631C

System program for NT631/NT631C without the -V suffix, and for
NT631/NT631C with the -V1 and -V2 suffix

NT631C-EV3 System program for NT631C with the -V3 suffix

Error Probable Cause Remedial Action

Mode setting error DIP switches SW1-1 to

SW1-3 are all OFF, or
more than one is ON.

Turn the NT631/NT631C power
OFF, set the Memory Unit DIP
switches correctly, then turn the
NT631/NT631C power back ON.

Protect setting error
(automatic transmis­sion)

Writing to the data write
destination has been pro­hibited by the setting of
SW2-1 or SW2-2.

Turn the NT631/NT631C power
OFF, set the Memory Unit DIP
switches correctly, then turn the
NT631/NT631C power back ON.

Protect setting error
(manual transmis­sion)

Writing to the data write
destination has been pro­hibited by the setting of
SW2-1 or SW2-2.

Perform either of the following pro­cedures.

• Press the OK touch switch to
return to the Memory Unit manual
transmission screen, make the
correct settings, then try again.

• Turn the NT631/NT631C power
OFF, correct the DIP switches set­tings of the Memory Unit, then
turn the power back ON.

Flash memory error An error occurred during

initialization of the
NT631/NT631C or Mem­ory Unit flash memory, or
during write processing.

Turn the NT631/NT631C power
OFF, then back ON. If the error
recurs, the flash memory at the
write destination may be faulty. In
this case, replace the PT.

Verify error An error occurred during

verification processing at
the flash memory of the
NT631/NT631C or the
Memory Unit.

Turn the NT631/NT631C power
OFF, then back ON. If the error
recurs, the flash memory at the
write destination may be faulty. In
this case, replace the PT.

Transmitting data
error
(The automatic
transmission only)

An attempt is made to
transmit data other than a
system program or the
system program of a dif­ferent PLC model into the
NT631/NT631C as the
system program.
An attempt is made to
write a system program
into the NT631/NT631C
as screen data.

Perform either of the following pro­cedures.

• Turn the NT631/NT631C power
OFF, correct the DIP switch set­tings of the Memory Unit, and
then turn the power back ON.

• Turn the NT631/NT631C power
OFF, set the DIP switch settings
to the manual transmission, and
then check the data inside the
Memory Unit.

47

SECTION 4

Connecting to the Host from the RS-232C Port

This section describes the method for connecting to the host using the RS-232C port of the PT.

4-1 Connecting to the RS-232C Port at the Host . . . . . . . . . . . . . . . . . . . . . . . . . 48

4-1-1 Host Types and Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4-1-2 Connecting Directly between RS-232C Ports . . . . . . . . . . . . . . . . . 73

48

Connecting to the RS-232C Port at the Host Section 4-1

4-1 Connecting to the RS-232C Port at the Host

The method for connecting between the RS-232C port of the PT and the RS­232C port of the host is as follows.

The following discussion is focused on the connection method to OMRON
PLCs (By using the memory link method, a connection can be made to any
arbitrary RS-232 unit). When making a connection to a host other than
OMRON PLCs, refer to the PLC Connection Manual (V042-E1-@) or NT31/
631 Multi Vendor Connection Manual (V060-E1-@).

Direct Connection Between The RS-232C Ports Using an RS-232C Cable
(page 73)

This is the easiest connection method. Depending on the host to which the
connection is to be made, it may be possible to use OMRON cables with con­nectors.

Reference: The CS/CJ-series CPU Unit cannot be connected with the 1:1 connection NT

Link method. Use the 1:N connection NT Link method instead to make the 1:1
connection. For details, refer to Using the NT Link (1:N) Method (page 65) or
Using the High-speed NT Link (1:N) Method (page 70).

4-1-1 Host Types and Settings

The types of host that can be connected to a PT by using the RS-232C ports
of both Units, and the settings to be made at the host, are described here.

When Using the Host Link
Method

Compatible Host Units

Some models and series of OMRON PLCs have the host link function built in.

In the CS/CJ-series or CQM1H PLCs, the host link method can be used by
installing a Serial Communications Board/Unit. In addition, some C200HX/
HG/HE(-Z)E CPU Unit can be connected in the host link method by installing
a Communications Board.
Check the model and series of the PLC, the type of installed Serial Communi­cations Board, Serial Communications Unit, or Host Link Unit before making a
connection.

The hosts that can be connected to the NT631/NT631C by the host link
method using the RS-232C ports of both Units are indicated in the table
below.

RS-232C cable (max. 15 m)

Host

NT631/NT631C

PLC

Series

Units with Built-in Host Link

Function

CPU Units Connectable with
Host Link Units or Expansion
Communications Board/Units

Host Link Unit or
Communications

Board/Unit

Connect-

able to

CS Series CS1G-CPU42/43/44/45-E(V1)

CS1H-CPU63/64/65/66/67-E(V1)
CS1G-CPU42H/43H/44H/45H
CS1H-CPU63H/64H/65H/66H/67H
CS1D-CPU65H/67H

CS1G-CPU42/43/44/45-E(V1)
CS1H-CPU63/64/65/66/67-E(V1)
CS1G-CPU42H/43H/44H/45H
CS1H-CPU63H/64H/65H/66H/67H

CS1D-CPU65H/67H

(*1)

CS1W-SCU21(-V1)
CS1W-SCB21(-V1)
CS1W-SCB41(-V1)

CS1G
CS1H
CS1D

CJ Series CJ1G-CPU44/45

CJ1G-CPU42H/43H/44H/45H
CJ1H-CPU65H/66H/67H
CJ1M-CPU11/12/13/22/23

CJ1G-CPU44/45
CJ1G-CPU42H/43H/44H/45H
CJ1H-CPU65H/66H/67H
CJ1M-CPU11/12/13/22/23

CJ1W-SCU21(-V1)
CJ1W-SCU41(-V1)

CJ1G
CJ1H
CJ1M

49

Connecting to the RS-232C Port at the Host Section 4-1

*1

This CPU Unit is for a Duplex-CPU Unit System. The CS1W-SCB21/42(-V1) Serial Communications Board
cannot be used.

C Series C1000H-CPU01-EV1

C2000H-CPU01-EV1

C120-LK201-EV1 C1000H

C2000H

C200HS-CPU01/03/21/23/
31/33-E
C200HE-CPU11/32/42-E
C200HE-CPU11/32/42-ZE
C200HG-CPU33/43/53/63-E
C200HG-CPU33/43/53/63-ZE
C200HX-CPU34/44/54/64-E
C200HX-CPU34/44/54/64
65/85-ZE

C200H-LK201-EV1 C200HS

C200HE
C200HE-Z
C200HG
C200HG-Z
C200HX
C200HX-Z

C200HS-CPU21/23/31/33-E C200HW-COM02/04/

05/06-EV1

C200HS

C200HE-CPU42-E
C20HE-CPU42-ZE

C200HE-CPU32/42-E
C200HE-CPU32/42-ZE

C200HE
C200HE-Z

C200HG-CPU43/63-E
C200HG-CPU43/63-ZE

C200HG-CPU33/43/53/63-E
C200HG-CPU33/43/53/63-ZE

C200HG
C200HG-Z

C200HX-CPU44/64-E
C200HX-CPU44/64/65/85-ZE

C200HX-CPU34/44/54/64-E
C200HX-CPU34/44/54/64/
65/85-ZE

C200HX
C200HX-Z

C1000H-CPU01-EV1
C2000H-CPU01-EV1

C500-LK201-EV1 C1000H

C2000H

C1000H-CPU01-EV1
C1000HF-CPU01-EV1
C2000H-CPU01-EV1

C500-LK203 C1000H (F)

C2000H

CPM1-10/20/30CDR-@
+CPM1-CIF01

CPM1

CPM1A-10/20/30/40CD@-@
+CPM1-CIF01
CPM2A-30/40/60CD@@-@
+CPM1-CIF01
(Peripheral port connection)

CPM2A

CPM2C-10/20@@@@@@-@

(*2)

CPM2C

CQM1-CPU21-E
CQM1-CPU41/42/43/44-EV1

CQM1

CQM1H-CPU11/21/51/61

(*3)

CQM1H-CPU51/61 CQM1H-SCB41 CQM1H

CV Series

(*4)

CV500-CPU01-EV1 CV500-CPU01-EV1 CV500-LK201 CV500

CV1000-CPU01-EV1 CV1000-CPU01-EV1 CV1000

CV2000-CPU01-EV1 CV2000-CPU01-EV1 CV2000

CVM1
Series

(*4)

CVM1-CPU01-EV2
CVM1-CPU11-EV2
CVM1-CPU21-EV2

CVM1-CPU01-EV2
CVM1-CPU11-EV2
CVM1-CPU21-EV2

CV500-LK201 CVM1

Compo­Bus/S
Master
Control
Unit

SRM1-C02-V1 SRM1

PLC

Series

Units with Built-in Host Link

Function

CPU Units Connectable with
Host Link Units or Expansion
Communications Board/Units

Host Link Unit or
Communications

Board/Unit

Connect-

able to

50

Connecting to the RS-232C Port at the Host Section 4-1

*2

Use a CPM2C-CN111 or CS1W-CN114/118 Connecting Cable, CPM1-CIF01 RS-232C Adapter, or CPM1­CIF11 RS-422A Adapter to connect.

*3

The CQM1H-CPU11 does not have a built-in RS-232C port, so connect to the peripheral port to the PT with
a CS1W-CN118 Connecting Cable.

*4

CPU Units of CVM1/CV-series PLCs without the suffix -EV@ cannot be connected.

Settings at The Host

When using the host link method, the settings shown below must be made at
the host (depending on the Unit, some of these settings may not be neces­sary, or settings not shown here may be necessary).

Set the host link communications speed at 9600 bps or 19200 bps with the
memory switch at the NT631/NT631C. For details, refer to 6-7-2 Setting the
Host Link Method (page 155).
The 1-to-N setting enables BCC (Block Check Character). It is not actually pos­sible to connect more than one NT631/NT631C in a single host link.

The setting methods for each type of Unit are described in the following.

Connecting to a C-series
Host Link Unit

C200H/C200HS/C200HE/HG/HX (-Z)E Rack-mounting Unit: C200H-LK201­V1

Setting the Front Switches

Set each switch with a flat blade screwdriver so that the values or symbols in
the setting value window agree with the following.

Item Switch Setting

I/O port RS-232C

Communications speed

Set the same speed as for the NT631/NT631C.

(*1)

Transfer code ASCII, 7 data bits, 2 stop bits

Parity Even

1-to-1/1-to-N

1-to-N

(*2)

Instruction level Level 1, 2, 3

Unit # 00

LK201

RUN
RCV

XMT

ERROR

SW1

0

0

5

2

• Unit # (SW1, SW2)

Set these switches to 0.

• Instruction level, parity, and transfer code (SW4)

Set this switch to 2.

• Communications speed (SW3)

Set this switch to 5 to select 9600 bps.
Set this switch to 6 to select 19200 bps.

SW3

SW2

SW4

51

Connecting to the RS-232C Port at the Host Section 4-1

Setting the Rear Switches

C1000H(F)/C2000H Rack-mounting Unit: 3G2A5-LK201-EV1

Setting the Front Switches

Setting the Rear Switches

ON

1

CTS selector switch

External

0 V (ON)

• 1-to-1/1-to-N selection (DIP switch)

Set #3 to ON.

• CTS selection (selector switch)

Set this always to 0 V (ON).

2
3
4

• Mode control (key switch)

Set this to host link.

Local

Host

ON

ON

SW1

SW2

1

2

3

4

5

6

7

8

I/O port

RS-422A
RS-232C

Synchronization

Internal
External

Terminator

OFF
ON

CTS

0 V

External

• I/O port selection (selector switch)

Set this to RS-232C.

• Unit # (DIP SW1)

Set SW1-1 to SW1-5 to OFF (0).

• Synchronization (selector switch)

Set this to Internal.

• Communications speed
(DIP SW2-1 to SW2-4)

• 1-to-1/1-to-N selection (DIP SW2-6)

Set SW2-6 to OFF (0) (1-to-N).

• Instruction level (DIP SW2-7, SW2-8)

Set these switches to ON (1).
(Levels 1, 2, and 3 are enabled.)

• CTS selection (selector switch)

Set this always to 0 V (ON).

1

2

3

4

5

6

7

8

Set these switches to 0010 to select
19,200 bps.

Set these switches to 1010 to select
9,600 bps.(0: OFF 1: ON)

52

Connecting to the RS-232C Port at the Host Section 4-1

C1000H/C2000H Rack-mounting Unit: C500-LK203

Setting the Rear Switches

C200H/C1000H/C2000H CPU-mounting Unit: 3G2A6-LK201-EV1

Setting the Rear Switches

ON

ON

SW1

SW2

I/O port

RS-422A
RS-232C

Synchronization

Internal
External

Terminator

OFF

ON

CTS

0 V

External

• I/O port selection (selector switch)

Set this to RS-232C.

• Synchronization (selector switch)

Set this to Internal.

• Communications speed
(DIP SW2-1 to SW2-4)

• 1-to-1/1-to-N selection (DIP SW2-6)

Set SW2-6 to OFF (0) (1-to-N).

• Instruction level (DIP SW2-7, SW2-8)

Set these switches to ON (1).
(Levels 1, 2, and 3 are enabled.)

5 V supply

ON
OFF

• Unit #, parity, and transfer code

(DIP SW1-1 to SW1-7)

Set SW1-1 to SW1-7 to OFF (0).

• CTS selection (selector switch)

Set this alwa

y

s to 0 V (ON).

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

Set these switches to 0010 to select
19,200 bps.

Set these switches to 1010 to select
9,600 bps.(0: OFF 1: ON)

SW1

SW2

SW3

• Unit #, parity, and transfer code

(DIP SW1-1 to SW1-5)
Set SW1-1 to SW1-5 to OFF (0).

• Communications speed (DIP SW2-1 to SW2-4)

Set these switches to 0010 to select 19200 bps.
Set these switches to 1010 to select 9600 bps.
(0: OFF 1: ON)

• 1-to-1/1-to-N selection (DIP SW2-6)

Set SW2-6 to OFF (0) (1-to-N).

• Instruction level (DIP SW2-7, SW2-8)

Set these switches to ON (1).
(Levels 1, 2, and 3 are enabled.)

• CTS selection (DIP SW3-1 and SW3-2)

Set SW3-1 to ON (1), and SW3-2 to OFF (0).
(Set this always to 0V.)

• Synchronization (DIP SW3-3 to SW3-6)

* Parity is fixed at Even Parity. Transfer code is

fixed at ASCII 7 data bits and 2 stop bits.

Set SW3-3, SW3-5, and SW3-6 to ON (1), and
SW3-4 to OFF (0). (Set these to Internal.)

53

Connecting to the RS-232C Port at the Host Section 4-1

Connecting to a CVM1/CV­series Host Link Unit

CVM1/CV-series Rack-mounting Unit: CV500-LK201

A CVM1/CV-series Host Link Unit (CV500-LK201) has two connectors (com­munications ports 1 and 2). Either of these ports can be used for connection
to an NT631/NT631C by the RS-232C method. However, since the connec­tors at these ports are of different types, a cable that matches the connector
must be prepared.

• Communications port 1
Communications port 1 is a 25-pin connector for RS-232C use only.

• Communications port 2
Communications port 2 is a 9-pin connector which allows selection of the
RS-232C or RS-422A method. When this port is used with the RS-232C
method, the I/O port selector switch on the front of the PT must be set to
RS-232C (the upper position).

CPU Bus Unit Settings

When connecting to a CVM1/CV-series Host Link Unit, set the following com­munications conditions for the CPU Bus Unit settings.

*1

Set the host link communications speed at 9600 bps or 19200 bps with the
memory switch at the NT631/NT631C. For details, refer to 6-7-2 Setting the
Host Link Method (page 155).

*2

The 1-to-N setting enables BCC (Block Check Character). It is not actually
possible to connect more than one NT631/NT631C in a single host link.

Set the CPU Bus Unit settings directly from a Programming Device (e.g. CX­Programmer).

For details on the CPU Bus Unit settings, refer to the SYSMAC CVM1/CV-
series Host Link Unit Operation Manual (W205-E1-@).

Item Setting at Host

Communications speed

Set the same speed as set at the NT631/NT631C

(*1)

Transfer code ASCII, 7 data bits, 2 stop bits

Parity Even

1-to-1, 1-to-N

1-to-N

(*2)

Instruction level Level 1, 2, 3

54

Connecting to the RS-232C Port at the Host Section 4-1

Setting The Front Switches

Connecting to a CPU Unit CV-series and CVM1/CV-series (-EV

@) CPU Units

CV500-CPU01-EV1/CV1000-CPU01-EV1/CV2000-CPU01-EV1

CVM1-CPU01-EV2/CVM1-CPU11-EV2/CVM1-CPU21-EV2

PLC Setup

When connecting to a CVM1/CV-series CPU Unit, set the following communi­cations conditions for the PLC Setup.

*1

Set the host link communications speed at 9600 bps or 19200 bps with the
memory switch at the NT631/NT631C. For details, refer to 6-7-2 Setting the
Host Link Method (page 155).

Either set PLC Setup directly from a Programming Device (e.g. CX-Program­mer), or transmit the PLC Setup made at a Programming Device to the CPU
Unit.

For details on the PLC Setup, refer to the SYSMAC CVM1/CV500/1000/2000
Operation Manual: Ladder Diagrams (W202-E1-@).

RS-232C

I/O port selector switch

RS-422A

• Unit # (SW3, SW4)

• Communications condition setting (DIP SW1)

Set this switch to OFF.

- Communications speed: 9600 bps

- Parity: Even

- Xon/Xoff control: Not executed

- Communications method: Full duplex

- Stop bits: 2 stop bits

- Data length: 7 bits

• I/O port selection (selector switch)

Set this to RS-232C.

• CTS selection (DIP SW2 and SW3)

Set SW2 or SW3 to ON. (Set this always to 0 V.)

Communications port 1
(RS-232C)

Communications port 2
(RS-232C/RS-422A)

When using communications port 2, set
these switches to 0.

To use communications port 1, set SW2. To
use communications port 2, set SW3.

Communications are executed in
accordance with the CPU Bus Unit system
settings made at the PLC. The initial values
for the system settings are as follows.

Item Setting at Host

Communications speed

Set the same speed as set at the NT631/NT631C

(*1)

Stop bit 2 stop bits

Parity Even

Data length ASCII 7 bits

Unit # 00

55

Connecting to the RS-232C Port at the Host Section 4-1

Setting the Front Switches

C-series C200HS, C200HX/HG/HE(-Z)E, CPM1, CPM2A, CPM2C, CQM1,
CPM1H CPU Units, SRM1

The connection method depends upon the model of PLC being used, as
shown in the following table.

PLC model Connection method

C200HS, CQM1 Connect to the CPU Unit’s built-in RS-232C port.

C200HX/HG/HE(-Z)E Connect to the CPU Unit’s built-in RS-232C port.

Connect to one of the RS-232C ports (port A or port B) on a
Serial Communications Board.

CQM1H Connect to the CPU Unit’s built-in RS-232C port.

Connect to the peripheral port through a CS1W-CN118
Connecting Cable.

Connect to the RS-232C port (port 1) on a Serial Communi­cations Board.

CPM1 Connect to the peripheral port through a CPM1-CIF01 RS-

232C Adapter.

CPM2A, SRM1 Connect to the CPU Unit’s built-in RS-232C port.

Connect to the peripheral port through a CPM1-CIF01 RS­232C Adapter.

CPM2C Connect to the CPU Unit’s RS-232C port or the peripheral

port through a Connecting Cable (CPM2C-CN111, CS1W­CN118, or CS1W-CN114).

(The CPM2C-CN111 splits the Unit’s Communications Port
into a RS-232C port and a peripheral port. A CPM1-CIF01
RS-232C Adapter is also required to connect to this periph­eral port.)

RS-232C

I/O port selector switch

RS-422A

• I/O port selection (selector switch)

Set this to RS-232C.

• System setting (DIP SW4)

Note

- DIP switch settings:

- PLC Setup:

To effect the existing DIP switch
settings, set SW4 to ON.

To effect the existing PLC Setup,
set SW4 to OFF.

For CPU Units manufactured before or
during June 1995 (lot No. @@65), the
existing DIP switch settings differ from
the existing PLC Setup as follows.

2,400 bps, 1 stop bit, even parity, 7 bit
data length

9,600 bps, 2 stop bits, even parity, 7 bit
data length

For CPU Units manufactured from July
1995 onward (lot No. @@75), the values
specified in the DIP switch settings also
are 9,600 bps and 2 stop bits.

56

Connecting to the RS-232C Port at the Host Section 4-1

PLC Setup Area Settings

When connecting to a C200HS, C200HX/HG/HE(-Z)E, CPM1, CPM2A,
CPM2C, CQM1, or CQM1H CPU Unit, or SRM1, set the following communi­cations conditions for the PLC Setup area.

*1

Set the host link communications speed at 9600 bps or 19200 bps with the
memory switch at the NT631/NT631C. For details, refer to 6-7-2 Setting the
Host Link Method (page 155).

Set the PLC Setup area settings directly from a Programming Device (e.g.
CX-Programmer).

For details on operations relating to the PLC Setup area, refer to the manual
for the PLC which is used.

The PLC Setup area word numbers and settings to be made depending on
the Unit and port to which the connection is made are shown below.

CPM2A, CPM2C, CQM1H, or SRM1: Peripheral port connection

C200HS, C200HX/HG/HE(-Z)E, CPM2A, CPM2C, CQM1, CQM1H (other
than the CPU11), or SRM1: Built-in RS-232C port connection

C200HX/HG/HE(-Z)E: Serial Communications Board port A
CQM1H: Serial Communications Board port 1

Item Setting at Host

Communications mode Host link mode

Communications speed

Set the same speed as set at the NT631/NT631C

(*1)

Stop bit 2 stop bits

Parity Even

Data length ASCII 7 bits

Unit # 00

Word # Writing Value Settings

DM6650 0001 Host link mode, no CTS control

Communications conditions set by the contents of DM

DM6651 0303 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 9600 bps

0304 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 19200 bps

DM6653 0000 Unit # 00

Word # Writing Value Settings

DM6645 0001 Host link mode, no CTS control

Communications conditions set by the contents of DM

DM6646 0303 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 9600 bps

0304 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 19200 bps

DM6648 0000 Unit # 00

Word # Writing Value Settings

DM6555 0001 Host link mode, no CTS control

Communications conditions set by the contents of DM

57

Connecting to the RS-232C Port at the Host Section 4-1

When using port B of the Communications Board of C200HX/HG/HE(-Z)E

When using a CPM1

Connecting to a CPM2C

The CPM2C PLCs do not have the same kind of port connectors found on CS/
CJ-series PLCs. The CPM2C’s communications port handles both RS-232C
and peripheral port connections which are divided internally. Therefore, when
using the CPM2C, it is necessary to select RS-232C or peripheral port con­nections, according to the kind of cable and port (on the cable) used, as
shown in the following table. Refer to the CPM2C Operation Manual for more
details.

Setting the DIP Switches of a C200HX/HG/HE(-Z)E, CQM1 or CQM1H

When using a C200HX/HG/HE(-Z)E, CQM1, or CQM1H the DIP switches on
the front panel must be set as shown below in order to make the settings in
the PLC Setup area (data memory) effective.

DM6556 0303 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 9600 bps

0304 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 19200 bps

DM6558 0000 Unit # 00

Word # Writing Value Settings

DM6550 0001 Host link mode, no CTS control

Communications conditions set by the contents of DM

DM6551 0303 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 9600 bps

0304 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 19200 bps

DM6553 0000 Unit # 00

Word # Writing Value Settings

DM6650 0001 Host link mode

Communications conditions set by the contents of DM

DM6651 0303 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 9600 bps

0304 Data length 7 bits, 2 stop bits, even parity, communica-

tions speed: 19200 bps

DM6653 0000 Unit # 00

Port connecting to PT PLC Setup

RS-232C port (D-Sub 9-pin) of CPM2C-CN111 Built-in RS-232C port settings

Peripheral port of CPM2C-CN111 Peripheral port settings

RS-232C port (D-Sub 9-pin) of CS1W-CN118 Built-in RS-232C port settings

Peripheral port of CS1W-CN114 Peripheral port settings

Word # Writing Value Settings

Peripheral port

CPM2C-CN111

CPM2C

CS1W-CN118

CPM2C

Peripheral port

CS1W-CN114

CPM2C

RS-232C port
(D-Sub 9-pin, female)

RS-232C port
(D-Sub 9-pin, female)

58

Connecting to the RS-232C Port at the Host Section 4-1

When using the CQM1H’s built-in peripheral port, turn ON SW7.

Setting the Switches of a CPM2A

When using a CPM2A, the switches on the front panel must be set as shown
below in order to make the PLC Setup settings effective.

Setting the Switches of a CPM2C

When using a CPM2C, the switches on the front panel must be set as shown
below in order to make the PLC Setup settings effective.

Setting the Switches on a RS-232C Adapter

When using a CPM1-CIF01 RS-232C Adapter, set the mode switch as shown
in the following diagram.

C200HX/HG/HE(-Z)E

CQM1 CQM1H

RS-232C port communications condition setting
Set DIP SW5 to OFF to make the settings made
in PC Setup effective.

Set the Communications
switch to OFF (down
position).

• Connecting PT to peripheral port

• Connecting PT to built-in RS-232C port

SW1: OFF
SW2: ON

• Connecting PT to built-in RS-232C port

(A Programming Console is connected to the peripheral port.)

SW1: OFF
SW2: OFF

(A device that requires non-standard communications settings
is connected to the peripheral port.)

The settings for SW1 and SW2 depend upon the usage of
the peripheral port and RS-232C port.

CPM1

Set the mode setting switch to HOST (upper position).

CPM1­CIF01

59

Connecting to the RS-232C Port at the Host Section 4-1

CS/CJ-series CPU Unit: CS1G/H-CPU@@-E(V1), CS1G/H/D-CPU@@H

CJ1G/M-CPU@@, CJ1G/H-CPU@@H

Connect to the built-in RS-232C port of the CPU Unit, or the RS-232C port of
the Communications Board. Note that the connection to a peripheral port
must be made via an RS-232C adapter (CS1W-CN118) specially designed for
connecting to a peripheral port.

PLC Setup

When connecting to a CS/CJ-series CPU Unit, set the following communica­tions conditions for the PLC Setup area. Since the settings shown below are
the PLC default settings for the CPU Unit, no change to the PLC Setup is nec-

essary as long as the communications speed is maintained at 9600 bps.

*1

Set the host link communications speed at 9600 bps or 19200 bps with the
memory switch at the NT631/NT631C. For details, refer to 6-7-2 Setting the
Host Link Method (page 155).
When the communications speed is set to 19200 bps., the PLC Setup of
the CPU Unit need to be changed.

Either set the PLC Setup directly from a Programming Device (Programming
Console), or transmit the PLC Setup made at a Programming Device (CX­Programmer) to the CPU Unit.

For details on the PLC Setup, refer to the SYSMAC CS Series Operation

Manual (W339) or the SYSMAC CJ Series Operation Manual (W393).

Using the CPU Unit’s Built-in RS-232C Port

Using the CPU Unit’s Peripheral Port

Setting the Front Switches

Set the CPU Unit’s DIP switches to 4 or 5 in accordance with the port NT631/
NT631C is connected to. An example of a CS-series CPU Unit is shown
below.

Item Setting at Host

Communications speed Set the same speed as set at the NT631/NT631C(*1)

Stop bits 2 stop bits

Parity Even

Data length ASCII 7 bits

Unit No. for the host link 00

Word # Writing Value Settings

160 8000 Host link mode, data length 7 bits,

2 stop bits, even parity

161 0000 Communications speed: 9600 bps.

0007 Communications speed: 19200 bps.

166 0000 Unit #00

Word # Writing Value Settings

144 8000 Host link mode, data length 7 bits,

2 stop bits, even parity

145 0000 Communications speed: 9600 bps.

0007 Communications speed: 19200 bps.

150 0000 Unit #00

60

Connecting to the RS-232C Port at the Host Section 4-1

Connecting to CS-series Serial Communications Board

Serial Communications Board equipped with a RS-232C port for CS-series
CPU Units: CS1W-SCB21(-V1)/41(-V1) (See note.)

Note Cannot be used with the CS1D-CPU65H/67H.

Allocation DM Area Settings for CPU Unit

Settings are written from the Programming Device (a Programming Console
or CX-Programmer) directly into the allocation DM area (system setting area)
of the CPU Unit. After the settings are written, they become effective by turn­ing the power ON, restarting the Unit, restarting the communications port, or
execution of the STUP command.

In the following, the channel numbers of the allocation DM area and the set­tings are shown.

Connecting to a CS/CJ­series Serial
Communications Unit

CS/CJ-series Rack-mounting Unit:

CS1W-SCU21(-V1)

CJ1W-SCU21(-V1)/41(-V1)

Setting the Front-panel Switches

Set the unit number of the Serial Communications Unit by using the rotary
switch located on the front panel. Set each switch with a flat blade screwdriver
so that the values or symbols in the setting value window agree with the fol­lowing.

DIP switches (inside the battery storage)

SYSMAC CS1G

PROGRAMMABLE CONTROLLER

CPU42

OPEN

OPEN

PERIPHERAL

PORT

BUSY

RUN

ERR/ALM

INH

PRPHL/COMM

MCPWR

• Set SW4 to ON (establishing communications in

accordance with PC Setup) when connecting the
NT631/NT631C to a peripheral port.

• Set SW5 to OFF (establishing communications

in accordance with PC Setup) when connecting
the NT631/NT631C to a peripheral port.

Peripheral port
This is used mainly for
connection to the
Programming Device.
(This also supports the
RS-232C unit connection.)

RS-232 port
This is used mainly for
connection to the RS-232C
unit.
(This also supports the
CX-Programmer.)

Allocation DM area (words) Writing Value Settings

Port 1 Port 2

DM32000 DM32010 8000 Host link mode, 2 stop bits, even parity, data

length 7 bits

DM32001 DM32011 0000 Communications speed 9600 bps.

0007 Communications speed 19200 bps.

DM32002 DM32012 0000 Transmit delay time 0 ms.

DM32003 DM32013 0000 No CTS control Unit No.0 for host link

61

Connecting to the RS-232C Port at the Host Section 4-1

Allocation DM Area Settings for CPU Unit

Settings are written from the Programming Device (a Programming Console
or CX-Programmer) directly into the allocation DM area (system setting area)
of the CPU Unit. After the settings are written, they become effective by turn­ing the power ON, restarting the Unit, restarting the communications port, or
execution of the STUP command.
In the following, the channel numbers of the allocation DM area and the set­tings are shown.

m=DM30000+100

×unit # (CH)

When Using the NT Link
(1:1) Method

Compatible Host Units

Some models and series of OMRON PLCs have the NT link (1:1) function
built in. With CQM1H PLCs, a Serial Communications Board can be added to
provide 1:1 NT Link communications. Some C200HX/HG/HE(-Z)E CPU Units
can be connected by the NT link (1:1) method by installing a Communications
Board.

Check the model and series of the PLC against the type of CPU Unit before
making the connections.

SCU21

RUN
ERC
SD1
RD1

RDY
ERH
SD2
RD2

No.

F

E

D
C
B

A

9

8

7

6

5

4

3

2

1

0

UNIT

Set the unit number to 0 through F so that
it will not overlap with the numbers used in
other units.

Allocation DM area (CH) Writing Value Settings

Port 1 Port 2

m m+10 8000 Host link mode, 2 stop bits, even parity, data

length 7 bits

m+1 m+11 0000 Communications speed 9600 bps.

0007 Communications speed 19200 bps.

m+2 m+12 0000 Transmit delay time 0 ms.

m+3 m+13 0000 No CTS control Unit No.0 for host link

62

Connecting to the RS-232C Port at the Host Section 4-1

The hosts that can be connected to the NT631/NT631C by the NT Link (1:1)
method using the RS-232C ports of both Units are indicated in the table
below.

PLC Series CPU Units with Built-in

NT Link Function

CPU Units Connect-

able with Expansion

Communications

Board

(*1)

Connectable to

C Series C200HS-CPU21-E, -EC

C200HS-CPU23-E
C200HS-CPU31-E
C200HS-CPU33-E

C200HS

C200HE-CPU42-(Z)E C200HE-CPU32-(Z)E

C200HE-CPU42-(Z)E

C200HE (-ZE)

C200HG-CPU43-(Z)E
C200HG-CPU63-(Z)E

C200HG-CPU33-(Z)E
C200HG-CPU43-(Z)E
C200HG-CPU53-(Z)E
C200HG-CPU63-(Z)E

C200HG (-ZE)

C200HX-CPU44-(Z)E
C200HX-CPU64-(Z)E
X200HX-CPU65-ZE
C200HX-CPU85-ZE

C200HX-CPU34-(Z)E
C200HX-CPU44-(Z)E
C200HX-CPU54-(Z)E
C200HX-CPU64-(Z)E
C200HX-CPU65-ZE
C200HX-CPU85-ZE

C200HX (-ZE)

CPM1-10CDR-@

(*2)

CPM1-20CDR-@

(*2)

CPM1-30CDR-@

(*2)

CPM1A-10CD@-@

(*2)

CPM1A-20CD@-@

(*2)

CPM1A-30CD@-@

(*2)

CPM1A-40CD@-@

(*2)

CPM1

CPM2A-30CD@@-@
CPM2A-40CD@@-@
CPM2A-60CD@@-@

CPM2A

CPM2C-10@@@@@@-@

(*3)

CPM2C-20@@@@@@-@

CPM2C

CQM1-CPU41-EV1
CQM1-CPU42-EV1
CQM1-CPU43-EV1
CQM1-CPU44-EV1
CQM1-CPU45-EV1

CQM1

CQM1H-CPU21
CQM1H-CPU51
CQM1H-CPU61

CQM1H-CPU51

(*4)

CQM1H-CPU61

(*4)

CQM1H

CV Series

(*5)

CV500-CPU01-EV1 CV500

CV1000-CPU01-EV1 CV1000

CV2000-CPU01-EV1 CV2000

63

Connecting to the RS-232C Port at the Host Section 4-1

*1

One of the following Communications Boards is required: C200HW­COM02/COM04/COM05/COM06-EV1.

*2

A CPM1-CIF01 Adapter is required.

*3

Use a CPM2C-CN111 or CS1W-CN114/118 Connecting Cable, CPM1­CIF01 RS-232C Adapter, or CPM1-CIF11 RS-422A Adapter to connect.

*4

A CQM1H-SCB41 Serial Communications Board is required.

*5

CPU Units of CVM1/CV-series PLCs without the suffix -EV@ cannot be
connected.

Reference: CS/CJ-series CPU Units cannot be connected with the 1:1 connection NT link

method. Use the 1:N connection NT link method (standard or high-speed)
instead to make the 1:1 connection. For details, refer to Using the NT Link
(1:N) Method (page 65) or Using the High-speed NT Link (1:N) Method
(page 70).

Settings at the Host

The setting methods for each Unit are as follows.

Connecting to a C-series C200HS, C200HX/HG/HE(-Z)E, CPM1, CPM2A,
CPM2C, CQM1, CQM1H or SRM1 PLC

PLC Setup Area Settings

Write the PLC Setup area (data memory) settings directly from a Program­ming Device (e.g. CX-Programmer) in accordance with the host model and
port.

*1

RS-232C port of the Communications Board

*2

RS-232C port of the Serial Communications Board

For details on operations relating to the PLC Setup area, refer to the manual
for the PLC which is used.

CVM1
Series

(*5)

CVM1-CPU01-EV2
CVM1-CPU11-EV2
CVM1-CPU21-EV2

CVM1

CompoBus/
S Master
Control Unit

SRM1-C02-V1 SRM1

PLC Series CPU Units with Built-in

NT Link Function

CPU Units Connect­able with Expansion

Communications

Board

(*1)

Connectable to

Host Model Word # Writing Value Setting

RS-232C port of C200HS, C200HX/
HG/HE(-Z)E, CPM2A, CPM2C,
CQM1, CQM1H, SRM1

DM6645 4000 Use NT link

(1:1)

Port A of C200HX/HG/HE(-Z)E

(*1)

Por t 1 of CQM1H

(*2)

DM6555

Port B of C200HX/HG/HE(-Z)E

(*1)

DM6550

CPM1 DM6650

64

Connecting to the RS-232C Port at the Host Section 4-1

Connecting to a CPM2C

The CPM2C PLCs do not have the same kind of port connectors found on CS/
CJ-series PLCs. The CPM2C’s communications port handles both RS-232C
and peripheral port connections which are divided internally. Therefore, when
using the CPM2C, it is necessary to select RS-232C or peripheral port con­nections, according to the kind of cable and port (on the cable) used, as
shown in the following table. Refer to the CPM2C Operation Manual for more
details.

Setting the DIP Switches of a C200HX/HG/HE(-Z)E, CQM1, or CQM1H

When using a C200HX/HG/HE(-Z)E, CQM1, or CQM1H, the DIP switches on
the front panel must be set as shown below in order to make the settings in
the PLC Setup area (data memory) effective.

Setting the Switches of a CPM2A

When using a CPM2A, the switches on the front panel must be set as shown
below in order to make the PLC Setup settings effective.

Setting the Switches of a CPM2C

When using a CPM2C, the switches on the front panel must be set as shown
below in order to make the PLC Setup settings effective.

Port connecting to PT PLC Setup

RS-232C por t (D-Sub 9-pin) of CPM2C-CN111 Built-in RS-232C port settings

Peripheral port of CPM2C-CN111 Peripheral port settings

RS-232C port (D-Sub 9-pin) of CS1W-CN118 Built-in RS-232C port settings

Peripheral port of CS1W-CN114 Peripheral port settings

Peripheral port

CPM2C-CN111

CPM2C

CS1W-CN118

CPM2C

Peripheral port

CS1W-CN114

CPM2C

RS-232C port
(D-Sub 9-pin, female)

RS-232C port
(D-Sub 9-pin, female)

C200HX/HG/HE(-Z)E

CQM1 CQM1H

RS-232C port communications condition setting
Set DIP SW5 to OFF to make the settings made
in PLC Setup effective.

Set the Communications
switch to OFF (down
position).

65

Connecting to the RS-232C Port at the Host Section 4-1

Setting the Switches on an RS-232C Adapter

When using a CPM1-CIF01 RS-232C Adapter, set the mode switch as shown
in the following diagram.

Connecting to CVM1/CV Series (-EV

@)

Set the DIP switches on the front panel as follows.

When using a CVM1/CV-series PLC, CPU Unit execution processing (execu­tion control 2) in the PLC Setup must be set to Simultaneous processing.

Using the NT Link (1:N)
Method

Compatible Host Units

The OMRON PLCs that can be connected using the NT link (1:N) method are
the CS/CJ-series CPU Units and the C-series C200HX/HG/HE(-Z)E, CQM1H,
and SRM1 only. With the CS/CJ-series PLCs, it is possible to connect a 1:N
NT Link using a Serial Communications Board (CS Series only) or a Serial
Communications Unit.

• Connecting PT to peripheral port

• Connecting PT to built-in RS-232C port

SW1: OFF
SW2: ON

• Connecting PT to built-in RS-232C port

SW1: OFF
SW2: OFF

The settings for SW1 and SW2 depend upon the usage of the
peripheral port and RS-232C port.

(A device that requires non-standard communications
settings is connected to the peripheral port.)

(A Programming Console is connected to the peripheral
port.)

Set the mode setting switch to NT (lower position).

CPM1­CIF01

OFF

ON

1

2

3

4

5

6

I/O port selection (selector switch)
Set this to RS-232C.

Set SW3 to use NT Link
(ON, right side).

DIP switch setting (SW3)

66

Connecting to the RS-232C Port at the Host Section 4-1

Check the model and series of the PLC as well as the model of Serial Com­munications Board or Unit being used before making the connections.

The hosts that can be connected to the NT631/NT631C by the NT link (1:N)
method using the RS-232C ports of both Units are indicated in the table
below.

*1

A CS1W-SCB21(-V1) or CS1W-SCB41(-V1) Serial Communications Board
or CS1W-SCU21(-V1) Serial Communications Unit is required.

*2

A CS1W-SCU21(-V1) Serial Communications Unit is required. A CS1W­SCB21/41(-V1) Serial Communications Board cannot be used.

*3

One of the following Communications Units is required:
CJ1W-SCU21/41(-V1).

*4

One of the following Communications Boards is required:
C200HW-COM02/COM04/COM05/COM06-E(V1)

*5

A CQM1H-SCB41 Serial Communications Board is required.

PLC Series CPU Units with Built-in NT Link

Function

CPU Units Connectable with

Communications Board/Unit

Connectable

to

CS Series CS1G-CPU42/43/44/45-E(V1)

CS1H-CPU63/64/65/66/67-E(V1)
CS1G-CPU42H/43H/44H/45H
CS1H-CPU63H/64H/65H/66H/

67H
CS1D-CPU65H/67H

CS1G-CPU42/43/44/45-E(V1)

(*1)

CS1H-CPU63/64/65/66/67-E(V1)

(*1)

CS1G-CPU42H/43H/44H/45H

(*1)

CS1H-CPU63H/64H/65H/66H/
67H

(*1)

CS1D-CPU65H/67H

(*2)

CS1G
CS1H
CS1D

CJ Series CJ1G-CPU44/45

CJ1G-CPU42H/43H/44H/45H
CJ1H-CPU65H/66H/67H
CJ1M-CPU11/12/13/21/22/23

CJ1G-CPU44/45

(*3)

CJ1G-CPU42H/43H/44H/45H

(*3)

CJ1H-CPU65H/66H/67H

(*3)

CJ1M-CPU11/12/13/21/22/23

(*3)

CJ1G
CJ1H
CJ1M

C Series C200HE-CPU42-(Z)E

C200HE-CPU32-(Z)E

(*4)

C200HE-CPU42-(Z)E

(*4)

C200HE (-Z)E

C200HG-CPU43-(Z)E
C200HG-CPU63-(Z)E

C200HG-CPU33-(Z)E

(*4)

C200HG-CPU43-(Z)E

(*4)

C200HG-CPU53-(Z)E

(*4)

C200HG-CPU63-(Z)E

(*4)

C200HG (-Z)E

C200HX-CPU44-(Z)E
C200HX-CPU64-(Z)E
C200HX-CPU65-ZE
C200HX-CPU85-ZE

C200HX-CPU34-(Z)E

(*4)

C200HX-CPU44-(Z)E

(*4)

C200HX-CPU54-(Z)E

(*4)

C200HX-CPU64-(Z)E

(*4)

C200HX-CPU65-ZE

(*4)

C200HX-CPU85-ZE

(*4)

C200HX (-Z)E

---

CQM1H-CPU51

(*5)

CQM1H-CPU61

(*5)

CQM1H

CompoBus/
S Master
Control Unit

SRM1-C02-V2 --- SRM1

67

Connecting to the RS-232C Port at the Host Section 4-1

Reference: Version 1 (-V1) and high-speed versions (H) of the CS-series and CJ-series

CPU Units support the high-speed 1:N NT Link method in addition to the
standard 1:N NT Link method. Furthermore, the high-speed 1:N NT Link
method can be used in earlier versions of CS-series CPU Units by installing
the latest version of a Serial Communications Board or Unit. For details, refer
to Using the High-speed NT Link (1:N) Method (page 70).

Settings at the Host

The Settings required for each Unit are described below.

• Connecting a C-series C200HX/HG/HE(-Z)E, CQM1H, or SRM1

PLC Setup Area Settings

Write the PLC Setup area (data memory) settings directly from a Program­ming Device (e.g. CX-Programmer) in accordance with the host model and

port.

*1

RS-232C port on the Communications Board

*2

RS-232C port on the Serial Communications Board

*3

When using a C200HE(-Z)E, the maximum PT unit number is 3.

Refer to the PLC’s operation manual for details on changing PLC Setup set­tings.

Setting the DIP Switches of a C200HX/HG/HE(-Z)E

When using a C200HX/HG/HE(-Z)E, the DIP switches on the front panel must
be set as shown below in order to make the settings in the PLC Setup area
(data memory) effective.

Connecting to CS/CJ-series CPU Units
CS/CJ-series CPU Unit: CS1G/H-CPU@@-E(V1), CS1G/H/D-CPU@@H,

CJ1G/M-CPU@@, CJ1G/H-CPU@@H

Connect the PT to the CPU Unit’s built-in RS-232C port. Use a CS1W-CN118
Connecting Cable, however, if connecting the PT to the peripheral port of the
CPU Unit.

PLC Setup Area Settings

When connecting to a CS/CJ-series CPU Unit, set the following communica­tions conditions for the PLC Setup area, in accordance with the communica­tions port to be used.

Connection to Word # Writing

Val ue

Setting

C200HX/HG/HE(-Z)E, SRM1
Built-in RS-232C port

DM6645 5@00 Use NT link (1:N)

@ = highest unit number of
the connected PTs (1 to 7)

(*3)

C200HX/HG/HE(-Z)E

Communications Board port A

*1

CQM1H port 1

*2

DM6555

C200HX/HG/HE(-Z)E

Communications Board port B

*1

DM6550

RS-232C port communications condition setting
Set DIP SW5 to OFF to make the settings made in
PLC Setup effective.

68

Connecting to the RS-232C Port at the Host Section 4-1

Using the CPU Unit's Built-in RS-232C Port

*1

Set any value between 0000 and 0009 Hex for the communications baud
rate. The same baud rate will be used regardless of the value as long as it
is between 0000 and 0009 Hex.

Using the CPU Unit's Peripheral Port

*1

Set any value between 0000 and 0009 Hex for the communications baud
rate. The same baud rate will be used regardless of the value as long as it
is between 0000 and 0009 Hex.

When connecting PT with its model number 0, 2-5 to the built-in RS-232C
port, for example, set the value 8200 Hex to 160 CH, and 0005 Hex to 166CH.

Either set PLC Setup directly from a Programming Device (Programming Con­sole), or transmit the PLC Setup made at a Programming Device (CX-Pro­grammer) to the CPU Unit.
For details on the PLC Setup, refer to the SYSMAC CS Series Operation
Manual (W339) or the SYSMAC CJ Series Operation Manual (W393).

Setting the Front Switches

Set the CPU Unit’s DIP switch to 4 or 5 in accordance with the port NT631/
NT631C is connected to. An example of a CS-series CPU Unit is shown
below.

Connecting to CS-series Serial Communications Board

Serial Communications Board equipped with a RS-232C port for CS1-series
CPU Units: CS1W-SCB21(-V1)/41(-V1) (See note.)

Word # Writing Value Settings

160 8200 NT link (1:N) mode

161

0000 to 0009

(*1)

Communications baud rate (standard)

166 000@@ = The largest model number of the con-

nected PT (0 – 7)

Word # Writing Value Settings

144 8200 NT link (1:N) mode

145

0000 to 0009

(*1)

Communications baud rate (standard)

150 000@@ = The largest model number of the con-

nected PT (0 – 7)

Peripheral port

RS-232 port

DIP switches (inside the battery storage)

SYSMAC CS1G

PROGRAMMABLE CONTROLLER
CPU42

OPEN

OPEN

PERIPHERAL

PORT

BUSY

RUN

ERR/ALM

INH

PRPHL/COMM

MCPWR

• Set SW5 to OFF (establishing communications in

accordance with PLC Setup) when connecting the
NT631/NT631C to a peripheral port.

• Set SW4 to ON (establishing communications in

accordance with PLC Setup) when connecting the
NT631/NT631C to a peripheral port.

This is used mainly for
connection to the
Programming Device.
(This also supports the
RS-232C unit connection.)

This is used mainly
for connection to the
RS-232C unit.
(This also supports
the CX-Programmer.)

69

Connecting to the RS-232C Port at the Host Section 4-1

Note Cannot be used with the CS1D-CPU65H/67H.

CPU Unit Allocation DM Area Settings

Setting is written from the Programming Device (a Programming Console or
CX-Programmer) directly into the allocation DM area (system setting area) of
the CPU Unit. After the setting is written, it becomes effective by turning the
power ON, restarting the Unit, restarting the communications port, or execu­tion of the STUP command.
In the following, the channel numbers of the allocation DM area and settings
are shown.

*1

Set any value between 0000 and 0009 hex for the baud rate. The same
baud rate will be used regardless of the value as long as it is between 0000
and 0009 hex.

When connecting PTs with model numbers 3 to 6 to port 1, for example, set
the value 8200 hex to DM32000, 0000 hex to DM32001, and 0006 hex to
DM32006.

Connecting to CS/CJ-series Serial Communications Unit

A CS/CJ-series Rack-mounting Unit: CS1W-SCU21,

CJ1W-SCU21(-V1)/41(-V1)

Setting the Front Switches

Set the unit number of the Serial Communications Unit by using the rotary
switch located on the front panel. Set each switch with a flat blade screwdriver
so that the values or symbols in the setting value window agree with the fol­lowing.

Allocation DM Area Settings for CPU Unit

Setting is written from the Programming Device (a Programming Console or
CX-Programmer) directly into the allocation DM area (system setting area) of
the CPU Unit. After the setting is written, it becomes effective by turning the
power ON, restarting the Unit, restarting the communications port, or execu­tion of the STUP command.
In the following, the channel numbers of the allocation DM area and settings
are shown.

m=DM30000+100*unit number (CH)

Allocated DM Area words Setting Setting Contents

Port 1 Por t 2

DM32000 DM32010 8200 1:N NT Link Mode

DM32001 DM32011

0000 to 0009

(*1)

Baud rate (standard)

DM32006 DM32016 000@ @ = The highest unit number of the

connected PTs (0 to 7)

Allocated DM Area words Setting Setting Contents

Port 1 Por t 2

m m+10 8200 1:N NT Link Mode

m+1 m+11

0000 to 0009

(*1)

Baud rate (standard)

m+6 m+16 000@ @ = The highest unit number of the

connected PTs (0 to 7)

SCU21

RUN
ERC
SD1
RD1

RDY
ERH
SD2
RD2

No.

F

E

D

C

B

A

9

8

7

6

5

4

3

2

1

0

UNIT

Set the unit number to 0 through F so
that it will not overlap with the numbers
used in other units.

70

Connecting to the RS-232C Port at the Host Section 4-1

*1

Set any value between 0000 and 0009 hex for the baud rate. The same
baud rate will be used regardless of the value as long as it is between 0000
and 0009 hex.

Using the High-speed NT
Link (1:N) Method

Compatible Host Units

The high-speed 1:N NT Link method can be used with version 1 (-V1) and
high-speed versions (H) of the CS-series and CJ-series CPU Units. Further­more, the high-speed 1:N NT Link method can be used in earlier versions of
CS-series and CJ-series CPU Units by installing the latest version of a Serial
Communications Board (CS Series only) or Serial Communications Unit.

Be sure to check the model number of the PLC and Serial Communications
Board/Unit before trying to establish the high-speed 1:N NT Link.

The following table shows which CS-series PLCs can be connected to an
NT631/NT631C with the high-speed 1:N NT Link.

*1

The high-speed 1:N NT Link is not supported in a direct connection to the
CPU Unit of a CS1-series PLC without the -V1 suffix.

*2

A CS1W-SCB21 or CS1W-SCB41(-V1) Serial Communications Board or
CS1W-SCU21(-V1) Serial Communications Unit is required.

*3

A CS1W-SCU21(-V1) Serial Communications Unit is required.
A CS1W-SCB21/41(-V1) Serial Communications Board cannot be used.

*4

One of the following Communications Units is required:
CJ1W-SCU21/41(-V1).

Settings at the Host

The Settings required for each Unit are described below.

• Connecting CS/CJ-series CPU Units

CS/CJ-series CPU Unit: CS1G/H-CPU@@-EV1, CS1G/H/D-CPU@@H-E,

CJ1G/M-CPU@@-E, CJ1GH-CPU@@H-E

Connect the PT to the CPU Unit’s built-in RS-232C port. Use a CS1W-CN118
Connecting Cable, however, if connecting the PT to the peripheral port of the
CPU Unit.

PLC Setup

When connecting to a CS-series CPU Unit, set the following communications
conditions for the PLC Setup area, in accordance with the communications
port to be used.

PLC Series CPU Units with Built-in NT

Link Function

CPU Units Connectable with
Communications Board/Unit

Connectable to

CS Series

CS1G-CPU42/43/44/45-EV1

(*1)

CS1H-CPU63/64/65/66/67­EV1

(*1)

CS1G-CPU42H/43H/44H/45H
CS1H-CPU63H/64H/65H/66H/

67H
CS1D-CPU65H/67H

CS1G-CPU42/43/44/45-E(V1)

(*2)

CS1H-CPU63/64/65/66/67­E(V1)

(*2)

CS1G-CPU42H/43H/44H/45H

(*2)

CS1H-CPU63H/64H/65H/66H/
67H

(*2)

CS1D-CPU65H/67H

(*3)

CS1G
CS1H
CS1D

CJ Series CJ1G-CPU44/45

CJ1G-CPU42H/43H/44H/45H
CJ1H-CPU65H/66H/67H
CJ1M-CPU11/12/13/21/22/23

CJ1G-CPU44/45

(*4)

CJ1G-CPU42H/43H/44H/45H

(*4)

CJ1H-CPU65H/66H/67H

(*4)

CJ1M-CPU11/12/13/21/22/23

(*4)

CJ1G
CJ1H
CJ1M

71

Connecting to the RS-232C Port at the Host Section 4-1

Using the CPU Unit's Built-in RS-232C Port

Using the CPU Unit's Peripheral Port

When connecting PTs with model numbers 0, 2, 3, 4, and 5 to the built-in RS­232C port, for example, set the value 8200 hex to word 160, 000A hex to word
161, and 0005 hex to word 166.

Either set PLC Setup directly from a Programming Device (Programming Con­sole), or transmit the PLC Setup made at a Programming Device (CX-Pro­grammer) to the CPU Unit.

For details on the PLC Setup, refer to the SYSMAC CS Series Operation
Manual (W339) or the SYSMAC CJ Series Operation Manual (W393).

Reference: When using the CX-Programmer to set the high-speed 1:N NT Link, set the

communications baud rate to 115,200 bps.

Setting The Front Switches

Set the CPU Unit’s DIP switch to 4 or 5 in accordance with the port NT631/
NT631C is connected to. An example of a CS-series CPU Unit is shown
below.

Connecting to a CS-series Serial Communications Board

Serial Communications Board equipped with a RS-232C port for CS-series
CPU Units: CS1W-SCB21(-V1)/41(-V1)

Note Cannot be used with the CS1D-CPU65H/67H.

Word # Setting Setting Contents

160 8200 1:N NT Link Mode

161 000A Baud rate (standard)
166 000@ @ = The highest unit number of the connected

PTs (0 to 7)

Word # Setting Setting Contents

144 8200 1:N NT Link Mode

145 000A Baud rate (standard)
150 000@ @ = The highest unit number of the connected

PTs (0 to 7)

DIP switches (inside the battery storage)

SYSMAC CS1G

PROGRAMMABLE CONTROLLER
CPU42

OPEN

OPEN

PERIPHERAL

PORT

BUSY

RUN

ERR/ALM

INH

PRPHL/COMM

MCPWR

• Set SW4 to ON (establishing communications in

accordance with PLC Setup) when connecting the
NT631/NT631C to the peripheral port.

• Set SW5 to OFF (establishing communications in

accordance with PLC Setup) when connecting
the NT631/NT631C to the RS-232C port.

Peripheral port
This is used mainly for
connection to the
Programming Device.
(This also supports
connection of RS-232C
devices.)

RS-232 port
This is used mainly for
connection of RS-232C
devices.
(This also supports connection
of the CX-Programmer.)

72

Connecting to the RS-232C Port at the Host Section 4-1

Reference: CS-series Serial Communications Boards and Units with lot number 991220

(12/20/99) and later support the high-speed 1:N NT Link. Boards and Units
with earlier lot numbers cannot be used.

CPU Unit Allocation DM Area Settings

Setting is written from the Programming Device (a Programming Console or
CX-Programmer) directly into the allocation DM area (system setting area) of
the CPU Unit. After the setting is written, it becomes effective by turning the
power ON, restarting the Unit, restarting the communications port, or execu­tion of the STUP command.

In the following, the channel numbers of the allocation DM area and settings
are shown.

For example, when connecting PTs with model numbers 3, 4, 5, and 6 to port
1, set the value 8200 hex to DM32000, 000A hex to DM32001, and 0006 hex
to DM32006.

Connecting to a CS/CJ-series Serial Communications Unit

A CS/CJ-series Rack-mounting Unit: CS1W-SCU21(-V1),

CJ1W-SCU21(-V1)/41(-V1)

Reference: CS-series Serial Communications Boards and Units with lot number 991220

(12/20/99) and later support the high-speed 1:N NT Link. Boards and Units
with earlier lot numbers cannot be used.

Setting the Front Switches

Set the unit number of the Serial Communications Unit by using the rotary
switch located on the front panel. Set each switch with a flat blade screwdriver
so that the values or symbols in the setting value window agree with the fol­lowing.

Allocation DM Area Settings for CPU Unit

Setting is written from the Programming Device (a Programming Console or
CX-Programmer) directly into the allocation DM area (system setting area) of
the CPU Unit. After the setting is written, it becomes effective by turning the
power ON, restarting the Unit, restarting the communications port, or execu­tion of the STUP command.

In the following table, the channel numbers of the allocation DM area and set­tings are shown.

Allocated DM Area words Setting Setting Contents

Port 1 Por t 2

DM32000 DM32010 8200 1:N NT Link Mode

DM32001 DM32011 000A Baud rate (standard)
DM32006 DM32016 000@ @ = The highest unit number of the con-

nected PTs (0 to 7)

SCU21

RUN
ERC
SD1
RD1

RDY
ERH
SD2
RD2

No.

F

E

D
C

B

A

9

8

7

6

5

4

3

2

1

0

UNIT

Set the unit number to 0 through F so
that it will not overlap with the numbers
used in other units.

73

Connecting to the RS-232C Port at the Host Section 4-1

Word m = DM30000 + (100 × unit number)

When Using the Memory
Link Method

In the memory link method, the connection can be made to a personal com­puter with RS-232 and an FA computer, etc.

When connecting to the host in the memory link method, it is necessary to
create a program for the memory link at the host side.

The following are the communications conditions that can be used in the
memory link method. For the host (a personal computer, an FA computer,
etc.), its setting should be compatible to one of the communications condi­tions listed in the following table. Set the same communications conditions at
the NT631/NT631C by the memory switch. (page 160).

4-1-2 Connecting Directly between RS-232C Ports

The method for connection between the RS-232C ports of the NT631/
NT631C and the host is described here.

Recommended Connector Cable

When making the connector cable, as far as possible use the recommended
connectors, connector hoods, and cables indicated in the table below. Some
Units come supplied with one connector and one connector hood.

Allocated DM Area words Setting Setting Contents

Port 1 Por t 2

m m+10 8200 1:N NT Link Mode

m+1 m+11 000A Baud rate (standard)
m+6 m+16 000@ @ = The highest unit number of the con-

nected PTs (0 to 7)

Item Settings at the host

Input/Output port RS-232C

Communications speed 1200, 2400, 4800, 9600, 19200, 38400 bps.

Data bits length 7 bits, 8 bits

Stop bits length 1 bits, 2 bits

Parity None, even, odd

Flow control None, RS/CS, XON/XOFF

+DC

RESET
RD
TRM
RDB
SDA
SDB
CSA
CSB

24V

PRINTERPORTB

PORTA

Host Link Unit or CPU Unit

NT631/NT631C

9-pin connector

Cable with RS-232C connectors

Serial port A or B
(RS-232C, 9-pin type)

SYSMAC
CS/CJ-series PLC,
C-series PLC,
CVM1/CV-series PLC,
SRM1

9-pin connector
or
25-pin connector

74

Connecting to the RS-232C Port at the Host Section 4-1

Check the required components and prepare them in advance.

Note After connecting a communications cable, always secure it with the screws.

OMRON Cables with Connectors

When a connection is made at serial port A in other than the memory link
method, OMRON cables with connectors shown below are available.

Name Model Remarks Delivered with

Connector XM2A-0901 9-pin

Made by OMRON

CS-series CS1G/CS1H/
CS1D,

CJ-series CJ1G/CJ1H/
CJ1M,

C-series CQM1,
C200HS,

C200HX/HG/HE(-Z)E,
CVM1/CV-series CPU

Units
CV500-LK201

XM24-2501 25-pin

Made by OMRON

C500-LK203
CV500-LK201
C200H-LK201-EV1

DB-25P 25-pin

Made by JAE

3G2A5-LK201-EV1
3G2A6-LK201-EV1

Connector
hood

XM2S-0911 9-pin

Made by OMRON

C-series CQM1,
C200HS,

C200HX/HG/HE(-Z)E,
CVM1/CV-series CPU

Units
CV500-LK201

XM2S-0913 9-pin

Made by OMRON

XM2S-0911-E 9-pin

Made by OMRON

CS-series CS1G/CS1H/
CS1D,

CJ-series CJ1G/CJ1H/
CJ1M

XM2S-2511 25-pin

Made by OMRON

C500-LK203
CV500-LK201
C200H-LK201-EV1

DB-C2-J9 25-pin

Made by JAE

3G2A5-LK201-EV1
3G2A6-LK201-EV1

Cable AWG28×5P

IFVV-SB

Multi-core shielded cable
Made by Fujikura, Ltd.

CO-MA-VV-SB
5P×28AWG

Multi-core shielded cable
Made by Hitachi Cable,

Ltd.

Model Cable Length Connector Specification

XW2Z-200S 2 m 9-pin ⇔ 25 pin

XW2Z-500S 5 m
XW2Z-200T 2 m 9-pin ⇔ 9-pin

XW2Z-500T 5 m

75

Connecting to the RS-232C Port at the Host Section 4-1

When a connection is made to a personal computer at serial port A in the
memory link method, OMRON cable with connectors shown below are avail­able.

Note The cable’s tensile load is 30 N. Do not subject it to loads greater than this.

Wiring for a Host Link Unit
(25-pin) Connection

Applicable Units: C200H-LK201-EV1

3G2A5-LK201-EV1
C500-LK203
3G2A6-LK201-EV1
CV500-LK201 (communications port 1)

Cables with connectors that can be used at serial port A:

XW2Z-200S (9-pin

⇔ 25-pin, 2 m)

XW2Z-500S (9-pin

⇔ 25-pin, 5 m)

CVM1/CV-series Host Link Units (CV500-LK201) have two types of connec­tor; a 25-pin connector (communications port 1), and a 9-pin connector (com­munications port 2). When using communications port 2, refer to Wiring for
Other Connections (Other Than the Memory Link Method) (page 75).

Serial Port A, B

* For Units that have a CTS setting selector switch, RS and CS do not have

to be shorted if this switch is set to 0 V.

Wiring for Other
Connections

Applicable Units:

CV500-LK201 (communications port 2)
CS1W-SCU21(-V1)
CJ1W-SCU21(-V1) CJ1W-SCU41(-V1)
CPM1-10CDR-@ CPM1-20CDR-@
CPM1A-10CD@-@ CPM1A-20CD@-@
CPM1A-30CD@-@ CPM1A-40CD@-@
CPM2A-30CD@@-@ CPM2A-40CD@@-@
CPM2A-60CD@@-@
CPM2C-10@@@@@@-@ CPM2C-20@@@@@@-@
CQM1-CPU21-E
CQM1-CPU41-EV1 CQM1-CPU42-EV1
CQM1-CPU43-EV1 CQM1-CPU44-EV1
CQM1H-CPU11 CQM1H-CPU21
CQM1H-CPU51 CQM1H-CPU61

Model Cable Length Connector Specification

CV500-CN228 2 m 9-pin ⇔ 25 pin
XW2Z-S002 2 m 9-pin ⇔ 9 pin

1

6

5

9

*

NT631/NT631C

114

13 25

FG

+5V

CS

RS

RD

SD

SG

1

2

3

4

5

6

7

8

9

1

2

3

4

5

6

7

8

-

-

-

-

FG

SG

CS

RS

RD

SD

ER

-

-

-

-

-

PLC (host link unit)

(25-pin type)

(9-pin type)

Abbreviation

Abbreviation

Shielding wire

RS-232C
interface

RS-232C
interface

Connector
hood

Pin
number

Pin
number

76

Connecting to the RS-232C Port at the Host Section 4-1

CS1G-CPU42/43/44/45-E(V1)
CS1H-CPU63/64/65/66/67-E(V1)
CS1G-CPU42H/43H/44H/45H
CS1H-CPU63H/64H/65H/66H/67H
CS1D-CPU65H/67H
CJ1G-CPU44/45
CJ1G-CPU42H/43H/44H/45H
CJ1H-CPU65H/66H/67H
CJ1M-CPU11/12/13/21/22/23
C200HS-CPU21-E, -EC C200HS-CPU23-E
C200HS-CPU31-E C200HS-CPU33-E
C200HE-CPU32-(Z)E C200HE-CPU42-(Z)E
C200HG-CPU33-(Z)E C200HG-CPU43-(Z)E
C200HG-CPU53-(Z)E C200HG-CPU63-(Z)E
C200HX-CPU34-(Z)E C200HX-CPU44-(Z)E
C200HX-CPU54-(Z)E C200HX-CPU64-(Z)E
C200HX-CPU65-ZE C200HX-CPU85-ZE
CV500-CPU01-EV1 CV1000-CPU01-EV1
CV2000-CPU01-EV1
CVM1-CPU01-EV2 CVM1-CPU11-EV2
CVM1-CPU21-EV2
SRM1-C02-V2

Cables with connectors that can be used at serial port A:

XW2Z-200T (9-pin

⇔ 9-pin, 2 m)

XW2Z-500T (9-pin

⇔ 9-pin, 5 m)

CPU Units of CVM1/CV-series PLCs without the suffix -EV@ cannot be con­nected by any connection method.

When connecting to the peripheral port of a CS/CJ-series CPU Unit, a CS1W­CN118 Connecting Cable is required in addition to the above cables.

Serial Port A, B

Wiring for a Memory Link
Connection

Cables with connectors that can be used:

CV500-CN228 (9-pin

⇔25-pin, 2 m)

XW2Z-S002 (9-pin

⇔9-pin, 2 m)

Serial Port A, B

Prepare the adapter cable while referring to the following diagram.

1

6

5

9

1

6

5

9

FG

+5V

CS

RS

RD

SD

SG

1

2

3

4

5

6

7

8

9

2

3

4

5

6

7

8

9

-

-

-

FG

-

CS

RS

RD

SD

SG

-

-

NT631/NT631C PLC (Host link unit)

(9-pin type)

Shielding wire

(9-pin type)

Abbreviation

Abbreviation

RS-232C
interface

RS-232C
interface

Connector
hood

Pin
number

Pin
number

Connector
hood

77

Connecting to the RS-232C Port at the Host Section 4-1

(9-pin type)

Shielding wire

1

6

5

9

FG

−

SD

RD

RS

CS

+5V

−

−

SG

1

2

3

4

5

6

7

8

9

SD

RD

RS

CS

SG

NT631/NT631C

Host side

Abbreviation

Abbreviation

RS-232C
interface

RS-232C
interface

Connector
hood

Pin
number

Connector
hood

78

Connecting to the RS-232C Port at the Host Section 4-1

79

SECTION 5

Connecting to the Host from the RS-422A/485 Port

This section describes the method for connecting to the host using the RS-422A/485 port of the PT.

5-1 Connecting to the Host’s RS-232C Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

5-1-1 The Type of Host and Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

5-1-2 1:1 Connection between RS-422A/485 at the PT and RS-232C

at the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

5-1-3 1:N Connection between RS-422A/485 at the PT and RS-232C

at the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

5-1-4 Recommended Connectors, Cables, and Crimp Terminals . . . . . . . 90

5-1-5 Setting the Terminal Resistance for RS-422A/485 Communications 92

5-2 Connecting to the Host’s RS-422A/485 Port . . . . . . . . . . . . . . . . . . . . . . . . . 93

5-2-1 Host Types and Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

5-2-2 Direct Connection between RS-422A Ports at Both Units . . . . . . . 115

5-2-3 Direct Connection between RS-485 Ports at Both Units . . . . . . . . . 118

5-2-4 1:N Connection among RS-422A Ports. . . . . . . . . . . . . . . . . . . . . . 119

5-2-5 1:N Connection among RS-485 Ports . . . . . . . . . . . . . . . . . . . . . . . 121

5-2-6 Recommended Connectors, Cables and Crimp Terminals. . . . . . . . 123

5-2-7 Setting the Terminal Resistance for RS-422A/485 Communications 124

5-2-8 Handling the Shield on RS-422A/485 Cables . . . . . . . . . . . . . . . . . 125

80

Connecting to the Host’s RS-232C Port Section 5-1

5-1 Connecting to the Host’s RS-232C Port

The methods for connecting the RS-422A/485 port of the NT631/NT631C and
the RS-232C port of the host are described here. There are the following
methods.

The following discussion is focused on the connection method to OMRON
PLCs (By using the memory link method, a connection can be made to any
arbitrary RS-232 unit). When making a connection to a host other than
OMRON PLCs, refer to the PLC Connection Manual (V042-E1-@) or NT31/
631 Multi Vendor Connection Manual (V060-E1-@).

• Method in which the RS-422A port of the NT631/NT631C and the RS­232C port of the host are connected in a 1:1 connection via an RS-232C/
RS-422A Adapter (page 82).

When this method is used, the cable length can be extended up to
500 m.

• Method in which the RS-485 port of the NT631/NT631C and the RS-232C
port of the host are connected in a 1:1 connection via an RS-232C/RS­422A Adapter (page 82).

When this method is used, the cable length can be extended up to
500 m. This connection method can be used only with the NT Link
(1:N) method of type RS-485.

• Method in which the RS-422A ports of multiple NT631/NT631Cs and the
RS-232C port of the host are connected in a 1:N connection via an RS­232C/RS-422A Adapter (page 86).

This connection method is used with the RS-422A NT Link (1:N) meth­od.

• Method in which the RS-485 ports of multiple NT631/NT631Cs and the
RS-232C port of the host are connected in a 1:N connection via an RS­232C/RS-422A Adapter (page 86).

This connection method is used with the RS-485 NT Link (1:N) method
(standard or high-speed).

PT Host

RS-422A cable
(max. 500 m)

RS-232C
cable

(

max. 2 m

)

RS-232C/RS-422A
convertor unit

PT Host

RS-485 cable
(max. 500 m)

RS-232C
cable
(max. 2 m)

RS-232C/RS-422A
convertor unit

PT Host

RS-422A cable
(max. total length
500 m)

RS-232C
cable
(max. 2 m)

RS-232C/RS422A
convertor unit

81

Connecting to the Host’s RS-232C Port Section 5-1

Note One end of the wire must always be connected to the host (PLC), and there

must be no branching. Branching will cause problems such as transmission
delays and communications failures.

Reference: CS/CJ-series CPU Units cannot be connected with the 1:1 connection NT

Link method. Use the 1:N connection NT Link method (standard or high­speed) instead to make the 1:1 connection. For details, refer to Using the NT
Link (1:N) Method (page 65) or Using the High-speed NT Link (1:N) Method
(page 70).

5-1-1 The Type of Host and Settings

The using condition is the same as the connecting PT side RS-232C and the
host side RS-232C.
For the available type and settings of the host, refer to the pages listed below.

Settings at the RS-232C/
RS-422A Adapter (NT­AL001)

When making a connection between RS-232C and RS-422A/485 ports using
an RS-232C/RS-422A Adapter, set the DIP switches on the NT-AL001 as fol­lows.

PT Host

RS-485 cable
(max. total length
500 m)

RS-232C
cable
(max. 2 m)

RS-232C/RS422A
convertor unit

NT631

NT631C

PLC

PLC

NT631

PLC

NT631C NT631CNT631 NT631 NT631 NT631 NT631

(At termination)

Relay terminal block Relay terminal bloc

k

Max. 2 m

Example of Good Connection Examples of Bad Connections

(Not at
termination)

(Not at
termination)

(Not at
termination)

(At
termination)

Method Reference

Host link Host Link Method (page 48)

NT Link (1:1) NT Link (1:1) method (page 61)

NT Link (1:N) Using the NT Link (1:N) Method (page 65)

High-speed NT Link (1:N) Using the High-speed NT Link (1:N) Method (page 70)

Memory link Memory Link Method (page 73)

82

Connecting to the Host’s RS-232C Port Section 5-1

Note Read the manual supplied with the NT-AL001 carefully before using the Unit.

5-1-2 1:1 Connection between RS-422A/485 at the PT and RS-232C at

the Host

The connection method in which the RS-422A/485 port of an NT631/NT631C
and the RS-232C port of a host are connected via a Adapter is described
here.

An RS-232C/RS-422A Adapter (NT-AL001) is used to convert between the
RS-232C and RS-422A communications methods.

12345 6

ON

om on

R

NT-AL001

2-wire type/4-wire type selection (DIP SW1-3, SW1-4)
For RS-422A, set both of these switches to OFF (4-wire type).
For RS-485, set both of these switches to ON (2-wire type).

Example: the terminal resistor is active,

RS-422A, NT Link (1:N).

Built-in terminal resistor setting (DIP SW1-2)
If at the end of the RS-422A/485 cable, set this switch
to ON (to activate the built-in terminal resistor).

If not at the end of the RS-422A/485 cable, set this
switch to OFF (to inactivate the built-in terminal
resistor).

Selection of RS-422A/485 send mode (DIP SW1-5, SW1-6)
For host link or NT Link (1:1), set both of these switches to
OFF. (Always send)

For NT Link (1:N), set SW1-5 to OFF and SW1-6 to ON.
(Sends when CS is H)

NT631/NT631C

Host Link Unit or CPU Unit

RS-422A terminal block

9-pin connector

+DC

RESET
RDA
TRM
RDB
SDA
SDB
CSA
CSB

PRINTERPORTB

PORTA

24V

Serial port B
(RS-422A/485,
terminal block)

RS-232C/RS-422A
convertor unit
(NT-AL001)

RS-422A/485 cable
(max. length: 500 m)

RS-232C cable
with connectors

9-pin connector or
25-pin connector

SYSMAC
CS/CJ-series PLC
C-series PLC,
CVM1/CV-series PLC,
SRM1

83

Connecting to the Host’s RS-232C Port Section 5-1

Reference: When using RS-485 as a port for the NT631/NT631C, only NT Link (1:N)

method (standard or high-speed) can be used.

Connecting an NT631/NT631C and NT-AL001 (RS-422A)

For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS­422A/485 Cables on page 125.

Connecting an NT631/NT631C and NT-AL001 (RS-485)

For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS­422A/485 Cables on page 125.

Reference: When using RS-485 as a port for the NT631/NT631C, only NT Link (1:N)

method (standard or high-speed) can be used.

Connecting an NT-AL001 and Host

RS-422A

NT631/NT631C

Host

NT-AL001

NT631/NT631C side

Pin number

6

5

4

3

1

Abbreviation

RDA (-)

RDB (+)

SDA (-)

SDB (+)

7

5

3

1

8

6

4

2

NT-AL001 side

Shielding wire

Abbreviation

RDA (-)

TRM

RDB (+)

SDA (-)

SDB (+)

RSA (-)

RSB (+)

RDA

TRM

RDB

SDA

SDB

RSA

RSB

24V
+DC

RS-422A/
485
terminal
block

RS-422A
terminal
block

Short-circuit
tool

Functional
ground

Functional
ground

6

5

4

3

1

RDA (-)

RDB (+)

SDA (-)

SDB (+)

NT631/NT631C side

NT-AL001 side

Shielding wire

RDA

TRM

RDB

SDA

SDB

RSA

RSB

24V
+DC

RS-485

NT631/NT631C

Host

NT-AL001

7

5

3

1

8

6

4

2

RDA (-)

TRM

RDB (+)

SDA (-)

SDB (+)

RSA (-)

RSB (+)

Pin number

Abbreviation

Abbreviation

RS-422A/
485
terminal
block

RS-422A
terminal
block

Short-circuit
tool

Functional
ground

Functional
ground

RS-232C

NT631/NT631C

Host

NT-AL001