Omron NT631, NT31, NT21 REFERENCE MANUAL

Cat. No. V069-E1-03

NT21, NT31, and NT631 Series

Programmable Terminals

Reference Manual

NT21, NT31, and NT631 Series
Programmable Terminals

Reference Manual

Revised February 2008

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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

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

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

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

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

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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 “PC” means Programmable Controller and is not used as an abbreviation for any­thing else.

Visual Aids

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

 OMRON, 2001

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permis­sion of OMRON.

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is
constantly striving to improve its high-quality products, the information contained in this manual is subject to change
without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the informa­tion contained in this publication.

Note Indicates information of particular interest for efficient and convenient operation

of the product.

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

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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 PT 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 Functions of the NT21, NT31/NT31C and NT631/NT631C 4. . . . . . . . . . . . . . . . . . . . . . .

1-3 System Configuration 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 Communications with the Host 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5 Communication by Using Memory Links 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6 Before Operating 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

PT Functions 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1 PT Screens 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Areas for Control/Notification 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 Memory Tables 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4 Fixed Displays 90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5 Image and Library Data 106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6 Lamps 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-7 Touch Switches 119. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-8 Numeral Display 140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-9 Character String Display 148. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10 Graphs 154. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-11 Alarm List, Alarm History 182. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12 Inputting Numeric Values 192. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-13 Inputting Character Strings 210. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14 Recipes 216. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15 Window Function 237. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16 Special Functions 244. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17 Device Monitor Function 259. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-18 Mathematical Function 278. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-19 PT Configuration Settings 284. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3

How to Use the PT 287. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1 Screen Creation Procedure 288. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2 Buzzer, Backlight, and Display Control 290. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3 Screen Display and Notification 299. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-4 Display and Control of Windows 307. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-5 Changing Numeral and Character String Display 315. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-6 Display of Graphs 326. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-7 Input of Numeric Values and Character Strings 327. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-8 Using the Alarm List/History Function 346. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-9 Using the Display History Function 351. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-10 Display and Setting of Calendar Clock 354. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-11 Printing Data and Checking the Printer Status 362. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-12 Enabling/Disabling PT Operations 366. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TABLE OF CONTENTS

SECTION 4

Using Memory Link 369. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1 Operation of the Memory Link 370. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2 Outline of Communications 372. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3 Commands/Responses 375. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4 Memory Link Online Transfer Function 398. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5

Function Applications 401. . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1 Examples of Actual Applications of Direct Access 402. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2 Examples of Actual Applications of Memory Link 411. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6

Troubleshooting and Maintenance 415. . . . . . . . . . . . . . . . . .

6-1 Troubleshooting 416. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2 Responding to Displayed Error Messages 421. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendices

A Specifications 429. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B Compatibility with Screen Data of Other PT Models 435. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C NT20S and NT30/620 Compatible Modes 451. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D PC Memory Maps 459. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E Keycode Tables 463. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index 465. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Revision History 469. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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About this Manual:

This manual describes the basic functions and operation procedures of the NT-series NT21, NT31,
NT31C, NT631, and NT631C Programmable Terminals, their operations when connected to a PC (Pro­grammable Controller) or other host, and 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 describes the functions of the PT.

Section 2 gives basic information on the method for connecting to the host and communication methods,

and describes the names and functions of the parts of the PT.

Section 3 how to use the functions provided by the PT.

Section 4 gives an overview of memory link operations and contains explanations centered on commu-

nications between the PT and host when using memory link.

Section 5 presents a collection of simple practical examples that will give you hints on how to make best
use of the functions of the PT.

Section 6 describes the action to take when PT errors occur.

The Appendices provide the specifications, compatibility with screen data of other PT models, NT30/620
emulation mode, PC memory maps, and keycode tables.

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

personal 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.

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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

 NT21 PT Setup Manual (V068-E1-)

 NT31 and NT31C PT Setup Manual (V062-E1-)

 NT631 and NT631C PT Setup Manual (V063-E1-)

These manuals are used separately for the different models of PT. They describe
connecting the Programmable Terminals to a host and peripheral devices and
settings required for communications and applications.

The functions and actual operating messages for the NT21, NT31, NT31C,
NT631, and NT631C PTs are provided in the Reference Manual (V069-E1-).

Programmable Terminal Functions and Operation

 NT21, NT31, and NT631 Series PT Reference Manual

(V069-E1-, this manual)

This manual is used for any of the following PTs: NT21, 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 NT21 PT Setup Manu-

al (V068-E1-), NT31 and NT31C PT Setup Manual (V062-E1-), and 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 NT21, NT31, NT31C, 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

 PC Connection Manual (V042-E1-)

The NT31, NT31C, NT631, and NT631C PTs can be connected to controllers in
the following series: Mitsubishi’s 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
NT31, NT31C, NT631, and NT631C PTs to Mitsubishi controllers.

 NT31/NT631 Multivendor Connection Manual (V060-E1-)

The NT31 and NT31C 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.

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Read and Understand this Manual

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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

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a period of one year (or other period if specified) from date of sale by OMRON.

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OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING

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NON–INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE

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PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS

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DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.

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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

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PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR

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STRICT LIABILITY.

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In no event shall the responsibility of OMRON for any act exceed the individual price of the product on

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which liability is asserted.

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IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS

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REGARDING THE PRODUCTS UNLESS OMRON’S ANALYSIS CONFIRMS THAT THE PRODUCTS

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WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO

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CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

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Application Considerations

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SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to

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the combination of products in the customer’s application or use of the products.

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At the customer’s request, OMRON will provide applicable third party certification documents identifying

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ratings and limitations of use that apply to the products. This information by itself is not sufficient for a

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complete determination of the suitability of the products in combination with the end product, machine,

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system, or other application or use.

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The following are some examples of applications for which particular attention must be given. This is not

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intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the

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uses listed may be suitable for the products:

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• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions

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or uses not described in this manual.

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• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical

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equipment, amusement machines, vehicles, safety equipment, and installations subject to separate

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industry or government regulations.

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

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

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NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR

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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

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INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

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PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user’s programming of a programmable product, or any

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consequence thereof.

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Disclaimers

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CHANGE IN SPECIFICATIONS

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

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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

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changed without any notice. When in doubt, special model numbers may be assigned to fix or establish

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key specifications for your application on your request. Please consult with your OMRON representative

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at any time to confirm actual specifications of purchased products.

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DIMENSIONS AND WEIGHTS

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

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PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and

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does not constitute a warranty. It may represent the result of OMRON’s test conditions, and the users

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must correlate it to actual application requirements. Actual performance is subject to the OMRON

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Warranty and Limitations of Liability.

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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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ERRORS AND OMISSIONS

xiii

xiv

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xv

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 that 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.

3Safety Precautions

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 NT21.
The cautions, warnings, and dangers shown here contain important information
related to safety. The instructions in these cautions, warnings, and dangers must
be observed.

The conventions used and their meanings are presented below.

xvi

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.

3Safety Precautions

xvii

SECTION 1

General

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

1-1 Role and Operation of the PT 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-1 Operation of a PT at an FA Production Site 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-2 Operations of the PT 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 Functions of the NT21, NT31/NT31C and NT631/NT631C 4. . . . . . . . . . . . . . . . . . . . . . . .

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

1-2-2 Comparison between NT21, NT31, NT31C, NT631, and NT631C 7. . . . . . . . . . .

1-2-3 Comparisons with Earlier Models 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-4 Principal Functions of NT21, NT31/NT31C, and NT631/NT631C 14. . . . . . . . . . .

1-2-5 Displays 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3 System Configuration 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3-1 Peripheral Devices That Can Be Connected 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3-2 Connecting to the Host 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 Communications with the Host 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4-1 Direct Connection Function 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4-2 Host Link 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4-3 NT Link 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4-4 Functions of the Allocated Bits and Words 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4-5 Clock Data Area (PC to PT) (NT21 Only) 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4-6 Connecting to other Companies’ PCs 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5 Communication by Using Memory Links 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5-1 Memory Link 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5-2 Comparison between Direct Connection and Memory Link 35. . . . . . . . . . . . . . . . .

1-5-3 Memory Link Online Transfer Function 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6 Before Operating 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

1-1 Role and Operation of the PT

The NT21, NT31, NT31C, NT631, and NT631C are sophisticated operator inter­faces (Programmable Terminals) that automatically display information and can
also be used for operations when necessary. The following gives a general de­scription of the role and operation of the PT for those using a Programmable Ter­minal (PT) for the first time.

1-1-1 Operation of a PT at an FA Production Site

1-1SectionRole and Operation of the PT

Production Line Status
Monitoring

Directions to Workers on
the Shop Floor

The PT 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.

Production Control (3)

Product

Today’s target 560 441
Current production 305 275
Number defective 2 8
Number repaired 7 15

% achieved

The PT warns of system or equipment failures and prompts the appropriate re­medial action.

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

Panel Switch Functions

2

Setting touch switches on the PT allows workers to use the PT as an operating
panel; the results of the operations are transmitted to the host.

Electroplating control

Transport

Int. stop

Clamp

Unclamp

Adv.

Rev.

Electr.

head

Electro-

lyte

Wash.

head

Wash

Corr. prv.

head

Corr.

prv.fluid

1-1-2 Operations of the PT

1-1SectionRole and Operation of the PT

Transferring Screen Data

Displays Screens

The screen data to be displayed on the PT can be created on a personal comput­er using the Support Tool. Connect the PT to the personal computer with an
RS-232C cable and transfer the screen data to the PT.

Create screen data.

RS-232C

Screen data

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

Personal
computer

(Support Tool)

The information to be displayed (screen data) can be created on a computer us­ing the Support Tool and stored in the PT. The screen data can be displayed on
the PT in response to instructions from the host or touch switch operation.

Host

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

Receives Data from a
Host

Sends Data to a Host

The PT can be connected to the host by a host link or NT Link and receive neces­sary data from the host.

Host link, NT Link

Host

Data input using the touch panel (switch ON/OFF statuses, numeric values,
character strings) can be transmitted to the host.

Host

Touch panel

ON/OFF information, numeric
data, etc.

3

1-2 Functions of the NT21, NT31/NT31C and NT631/NT631C

The NT21, NT31/NT31C and NT631/NT631C have the following features.

1-2-1 Features

Slim Construction

• The PT is slimmer but retains the same functions. The depth is 50 mm max.

when mounted in a panel with the recommended thickness (1.6 to 4.8 mm.)

• The communication cable connectors are housed in the unit so that they do not

protrude from the unit.

Ideal Construction for an FA Environment

• NT21-ST121-E: STN monochrome LCD with backlight

• NT31-ST123-EV3: STN monochrome LCD with backlight

• NT31C-ST143-EV3: STN color LCD with backlight

• NT631-ST211-EV2: High-contrast EL display

• NT631C-ST141-EV2: STN color LCD with backlight

• NT631C-ST153-EV3: TFT color bright LCD with backlight

• The backlight unit and battery can be replaced onsite. (The backlight on the

NT21 cannot be replaced.)

• Degree of protection equivalent to IP65F with oil resistance (See note.), water

resistance equivalent to NEMA4

Note The panel can not be used in some IP65F environments requiring long-term ex-

posure to oil.

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

NT21

260 dots

140 dots

Wide angle of visibility

Panel Contrast and
Brightness Adjustment

Compatibility with Other PTs

NT31/NT31C

320 dots

240 dots

480 dots

Wide angle of visibility

NT631/NT631C

640 dots

On the NT31, NT31C, and NT631C, the contrast and brightness are adjustable
by touch switch operations. (These features are not supported on NT631 mod­els and NT631C-ST153-EV3.) On the NT21, the contrast is adjustable by
switch operations on the back panel.

• There is upward compatibility between the following models for screen data

and user programs: NT20S, NT30, NT30C, NT600S, NT21, NT31, NT31C
NT610G, NT610C, NT620S, NT620C, NT625C, NT631, NT631C. (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, refer to Appendix B Compatibility with

Screen Data of Other PT Models (page 435) and the Support Tool Operation
Manual.)

• The panel cut-out dimensions for the NT21 are the same as the dimensions for

the NT20S, the panel cut-out dimensions for the NT31/NT31C are the same as
the dimensions for the NT30/NT30C, and the panel cut-out dimensions for the
NT631/NT631C are the same as the dimensions for the NT625C.

4

Two Ports Featured as Standard:
Port A for Common Use by Support Tool/Host and Port B for Exclusive Use by the Host

• Communication 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 (NT-MF261) on the rear of the NT21, NT31/NT31C or

NT631/NT631C makes it easy to write screen data into the PT onsite. This en­ables a rapid response to setup changes.

• The NT21, NT31/NT31C, and NT631/NT631C can store a system program

into a Memory Unit. This enables the system to handle more flexible setups.

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

Screen Data Check
Function

Increased Screen Data
Capacity (NT21 and
NT31/NT31C)

Large Increase in
Maximum Number of
Registered Elements

Binary Data can be Read
to/Written from the Host

Character Display Using
High Definition Fonts

Simple Upgrades

Complies with
International Standards

Compatible with Other
Vendors’ Devices
(NT31/NT31C and
NT631/NT631C)

Screen data can be checked simply by operations in the NT21, NT31/NT31C, or
NT631/NT631C system menu, without connecting up to the Support Tool.

The NT21 data capacity of 512 Kbytes is over five times that of the NT20S and
the NT31/31C data capacity of 1 MB is twice that of the NT30/NT30C, enabling
storage of a larger quantity of screen data.

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 (page 431).

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

Any ×4 characters are displayed with a 32-dot high-definition font.

By using the system installer supplied with the ZJCAT1-EV4.6 Support Tool, the
system program at the NT21, NT31/NT31C or NT631/NT631C can be changed
easily from a personal computer.

The PTs meet UL/CSA standards and EC Directives.

Compatible with the 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, Modicon TSX Series, Se­quencers. Specialized system programs can be installed that allow the
NT31/NT31C or NT631/NT631C to be controlled from other companies’ Se­quencers. (The NT21 does not support PCs made by other companies.)

Multiple Windows

High-speed 1:N NT Link

Additional Mathematical
Functions

Device Monitor Function

Interlock Function

Up to 3 windows can be displayed simultaneously in the normal display. A
9-word window control area has been allocated in the host; the contents of these
9 words can be changed from the Host to open, close, and move windows.

The V3 versions are compatible with the high-speed 1:N NT Link as well as the
earlier standard 1:N NT Link.

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

The new device monitor function can be used to change the PC’s operating
mode or display/change values in the PC’s memory areas. The PVs of several
words can be listed with the device monitor.

PT operations and inputs can be disabled from the PC if interlock bits have been
allocated in the PC for the corresponding PT touch switches, numeric inputs, or
string inputs.

5

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

Improved Lamp/Touch
Switch Guide Characters

NT30/NT30C, and
NT620S/NT620C/NT625C
Compatible

Additional CS/CJ-series
PC Data Areas
Accessible

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

• Display several lines of guide characters.

• Switch the display between different guide characters when OFF and ON.

• Display numeral memory table contents as guide characters.

• Display string memory table contents as guide characters.

The word configuration of the PT status control area and PT status notify area
can be set to emulate those of the NT20S, NT30/NT30C, or NT620S/NT620C/
NT625C; this mode is called NT20S or NT30/620 compatible mode.

When the PT is operating in a compatible mode, it will be equivalent to an
NT20S, NT30/NT30C, or NT620S/NT620C/NT625C in the functions listed be­low. The PT retains full V2, V3 functionality in all functions other than the ones
listed below. Refer to Appendix C NT20S and NT30/620 Compatible Modes 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

Data areas in CS/CJ-series PCs that were previously inaccessible can be ac­cessed.

All banks in the EM Area, Timer Completion Flags (TU), Counter Comple­tion Flags (CU), Work Area (WR), Task Flags (TK), and the HR Area.

Recipe Function

Adjusting Contrast and
Brightness During PT
Operation

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., PC 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.

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.

6

1-2-2 Comparison between NT21, NT31, NT31C, NT631, and NT631C

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

NT21

NT31/NT31C

The NT21 models are shown in the following table.

Item NT21

Models NT21-ST121-E (Beige)

NT21-ST121B-E (Black)

Display STN monochrome LCD (with white backlight)

Two models are available: the monochrome NT31 and the 8-color NT31C. The
differences between the NT31 and NT31C are shown in the following table.

Item NT31 NT31C

NT631/NT631C

Front panel
color

Display STN monochrome LCD (with

Two models are available: the NT631 has a monochrome (yellow EL) display

NT31-ST123-EV3 (Beige)
NT31-ST123B-EV3 (Black)

white backlight)

NT31C-ST143-EV3 (Beige)
NT31C-ST143B-EV3 (Black)

STN color LCD (with white
backlight)

and the NT631C has an 8-color display. The differences between the NT631 and
NT631C are shown in the following table.

Item

Front panel
color

Display Monochrome EL display STN color LCD (with white backlight) Bright TFT color LCD (with white

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

NT631-ST211-EV2 (Beige)
NT631-ST211B-EV2 (Black)

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

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

backlight)

1-2-3 Comparisons with Earlier Models

Comparison between NT20S and NT21

Item NT20S NT21

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

Effective display area 112 x 56 mm (horizontal x vertical) 117 x 63 mm (horizontal x vertical)

Screen dots (resolution) 256 x 128 dots (horizontal x vertical) 260 x 140 dots (horizontal x vertical)

Number of touch switches 12 x 6 (horizontal x vertical) 13 x 7 (horizontal x vertical)

DIP switch settings On rear of Unit None (software settings)

Use of Memory Unit Not possible Possible (transferring system program

data and screen data)

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

screen data transfer.

Backlight life expectancy 10,000 hours min. 50,000 hours min.

Replacement Backlight NT20S-CFL01 Replacement not possible

Battery backup None Possible*1 (numeral table, string table,

System program data Installed in PT (not replaceable) The system installer and system pro-

1:N NT Links Standard only Standard or high-speed

Memory Link Not possible

Number of user-registered screens Maximum of 500 Maximum of 3,999

Screen data capacity
(User program memory)
Numeral/character string table Maximum of 128 entries each Maximum of 2,000 entries each

*3

96 KB 512 KB

*2

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

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

history data, recipe data)

gram data are supplied with the NT
Support Tool.

Possible

7

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

Item NT21NT20S

Bit memory table None Maximum of 1,000 bits

Mathematical table None 256 entries max.

Calculations can be executed
automatically in the PT.

Image data None Maximum of 4,095 (224 for compatibili-

ty with NT20S)

Library data None Maximum of 12,288 (896 for compati-

bility with NT20S)

Graphic figures (rectangles, poly­gons, circles/ovals, sectors, filling)

Image library displays None 256 per screen max.

Analog meters None 50 per screen max.

Trend graphs None 1 per screen max.

Broken-line graphs None 1 per screen max.

Alarm lists/history None 4 per screen max.

Recipe function None 1 per screen max.

Windows None 3 per max.

Method for storing numeric values
(numeral memory data and PT Sta­tus Control Area)

PT Status Control Area size 4 words 5 words (partial change of contents)

PT Status Notify Area size 3 words 2 words (partial change of contents)

Window Control Area size None 9 words

Clock Data Area size None 4 words

Registering continuous screens Possible Not possible (Use screen switches as

System tenkey Possible Not possible (Use normal tenkey as a

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

Interlock function None Operations can be disabled from the

Programming Console function Not possible. Possible.

Bar code reader connection Not possible. Possible.

High-quality font display Not possible. Possible.

Character codes CP437 (DOS) CP437 (DOS) or ISO8859/1 (Win-

Accessible CS/CJ PC data Areas --- The data areas listed below can be

None 65,535 total per screen, including other

fixed objects

BCD (binary-coded decimal) BCD (binary-coded decimal) or binary

(4 words for compatibility with NT20S)

(3 words for compatibility with NT20S)

a substitute.)

substitute.)

- ON/OFF switching is possible

- Numeral display is possible

- Character string display is possible

PC by allocating interlock bits to the
corresponding touch switch, numeral
input, character string input,
thumbwheel switches, or recipe
objects.

dows)

accessed in addition to the data areas
accessible with the NT20S.

- EM banks (EM_0 to EM_C)

- Timer Completion Flags (TU)

- Counter Completion Flags (CU)

- Work Areas (WR)

- Task Flags (TK)

- HR Area (HR)

*4

8

*1: The Battery is optional.
*2: The NT20S-ST128 supports RS-232C communications commands instead of memory links.
*3: This is the capacity of the flash memory that stores screen data.

*4: These data areas are accessible only when the PT is connected to the CS/CJ-series PC in a 1:N NT Link. (They are

not accessible through host link communications.)

For differences in programming, refer to Appendix B Compatibility with Screen
Data of Other PT Models on page 435.

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

9

Comparison between NT30/NT30C and NT31/NT31C

y

Item NT30/NT30C NT31/NT31C

Compatible Support Tool(s) NT-ZJCAT1-EV4 or

NT-ZA3AT-EV2

DIP switch settings On rear of unit None (software settings)

Use of B7A Interface Unit Possible Not possible

Use of Memory Unit Not possible Possible

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

screen data transfer.

RS-422A/485 interface Terminal block Serial port B (25-pin D-SUB connector)

Backlight color White/red (switchable) White only

Replacement backlight NT30-CFL01/NT30C-CFL01 NT31C-CFL01

NT31/NT31C system program data NT-ZS3AT-EV1

(including system installer)

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 unit By touch panel operation

Backlight brightness adjustment Not possible By touch panel operation

Number of user-registered screens 2,000 max. 3,999 max.

Screen data capacity

*1

512 KB 1 MB

(User program memory)

Numeral string data 1,000 max. 2,000 max.

Character string data 1,000 max. 2,000 max.

Bit data 256 1,000 max.

Mathematical table None 256 entries max.

Image data 224 max. 4,095 max.

Library data 896 max. 12,288 max.

Method for storing numeric values

Fixed as BCD (binary coded decimal) Selectable from BCD (binary coded
(numeral memory data and PT status
control area)

PT status control area size 4 words 5 words (partial change of contents)

PT status notify area size 3 words 2 words (partial change of contents)

Window control area size None 9 words

Registering continuous screen Possible Not possible (Use a screen switchover

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

NT-ZJCAT1-EV4

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

- Serial port B connector (for host
communications only, 25-pin)

(Used for the NT31-ST121-EV2
and NT31C-ST141-EV2. The user
cannot replace the backlight for the
NT31-ST122-EV2,
NT31C-ST142-EV2,
NT31-ST123-EV3, and
NT31C-ST143-EV3.)

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

Calculations can be executed
automatically in the PT.

*2

*2

decimal) or binary

as a substitute.)

- ON/OFF switching is possible

- Numeral display is possible

- Character string display is possible

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

*2

*2

10

Item NT31/NT31CNT30/NT30C

Interlock function None Operations can be disabled from the

PC 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 PC data
areas

*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.

*3: These functions are available only in the V2 and V3 versions of the NT31/31C.

--- 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 Area (WR)

- Task flags (TK)

- HR Area

*2

*3

For differences in programming, refer to Appendix B Compatibility with Screen
Data of Other PT Models on page 435.

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

11

Differences between the NT620S/NT620C/NT625C and NT631/NT631C

y

Item NT620S/NT620C/NT625C NT631/NT631C

Compatible Support Tool(s) NT-ZJCAT1-EV4 or

NT-ZA3AT-EV2

DIP switch settings On rear of unit None (software settings)

Use of Memory Unit Not possible Possible

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

screen data transfer.

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

NT625C: Terminal block (Select
RS-232C or RS-422A/485 with the DIP
switch.)

Replacement backlight NT620C-CFL01 (NT620C)

NT610C-CFL02 (NT625C)

NT631/NT631C system program
data

NT620-ZS3PC/ZS3DV-EV1
(including system installer)

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 unit Adjustable with touch panel operation.

Backlight brightness adjustment Not possible Adjustable with touch panel operation.

Number of user-registered screens 2,000 max. 3,999 max.

Screen data capacity

(User program memory)

*1

NT620S: 512 KB
NT620C/NT625C: 1 MB

Numeral string data 1,000 max. 2,000 max.

Character string data 1,000 max. 2,000 max.

Bit data 256 1,000 max.

Mathematical table None 256 entries max.

Image data 224 max. 4,095 max.

Library data 896 max. 12,288 max.

Method for storing numeric values

Fixed as BCD (binary coded decimal) Selectable from BCD (binary coded
(numeral memory data and PT
status control area)

PT status control area size 4 words 5 words (partial change of contents)

PT status notify area size 3 words 2 words (partial change of contents)

Window control area size None 9 words

Registering continuous screen Possible Not possible (Use a screen switchover

Lamp/Touch switch guide

Fixed display (1 line only) - Multiple lines can be displayed
characters

NT-ZJCAT1-EV4

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

- Serial port B connector (for host
communications only, 25-pin)

Terminal block (A memory switch can
set the RS-232C connector as serial
port B.)

NT631C-CFL01 (for ST151)

(The user cannot replace the
backlight for the
NT631C-ST152-EV2, and
NT631C-ST153-V3.)

NT631C-CFL02 (for ST141)

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

(NT631-ST141-V2 only)

(NT631-ST141-V2 only)

1 MB

Calculations can be executed
automatically in the PT.

*2

*2

decimal) or binary

as a substitute.)

- ON/OFF switching is possible

- Numeral display is possible

- Character string display is possible

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

*2

*2

12

Item NT631/NT631CNT620S/NT620C/NT625C

Interlock function None Operations can be disabled from the

PC 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 PC data
areas

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

*2: The values are the same as the NT620S/620C/NT625C when the PT is in NT30/620 compatible mode.

*3: These functions are available only in the V2 version of NT631 and the V2 and V3 versions of the NT631C.

--- 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 Area (WR)

- Task flags (TK)

- HR Area

*3

For differences in programming, refer to Appendix B Compatibility with Screen
Data of Other PT Models on page 435.

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

13

1-2-4 Principal Functions of NT21, NT31/NT31C, and NT631/NT631C

The following are the principal functions of the NT21, NT31/NT31C, and
NT631/NT631C.

Functions relating to data display

Character display

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.

Graphic display

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.

Memory data display

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

Graph display

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

Lamp display

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.

Alarm list/history display

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.

NT21

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

NT31/NT31C

NT631/NT631C

Functions relating to data output

Buzzer

A built-in buzzer can be sounded.

Screen printing (NT31/NT31C and NT631/NT631C)

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

14

Functions relating to data input

Input by touch switches

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.

Pop-up window function

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

input is required, the screen can be used efficiently.

. Since the window need only be opened when

Numeral/character string setting function

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 table entries and also sent to the host. It is also possible to disable
input by control from the host.

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

The PT can communicate with the host by four methods: host link, 1:1 NT Link, 1:N NT Link
(standard and 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 the NT31/NT31C and NT631/NT631C with PCs from other companies.

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

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

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

Resume function

The status and memory table contents of the NT21, NT31/NT31C, and 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. (Optional Bat­tery required for NT21.)

Screen saver function

This function serves to extend the service life of the backlight 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

The PT can perform the same operations as a C200H-PR027-E Programming Console when the PT is connected to a CPM1, CPM2A, CPM2C,
CQM1, CQM1H, C200HX/HG/HE(-Z)E, or SRM1 PC in a 1:1 NT Link connection, or a CS/CJ-series PC in a 1:N NT Link connection.

Device Monitor function (NT31/NT31C and NT631/NT631C)

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

System program install function

The system program of the NT21, NT31/NT31C, or NT631/NT631C can be changed by using the system installer supplied with the Support Tool
(NT-ZJCAT1-EV4). It can also be installed by using a Memory Unit (NT-MF261).

Screen display history function/alarm history 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.

Trend graph logging function and background function

Changes in the contents of numeral memory table entries 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).

Mathematical function

This function allows calculations to be executed regularly during PT operation when mathematical table entries 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.

15

1-2-5 Displays

Example NT31/NT31C Display

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

The NT21, NT31/NT31C, and 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 NT21, NT31/NT31C, and
NT631/NT631C are created by using the Support Tool at a personal computer.

Fixed Displays

Characters
(fixed display)

Bar
graph

Line 1 Status

Machine name: NT31C-ST143

Production qty.: 137 units

0% 50% 100%

Stage 1

Stage 2

Stop

Restart

Check 2Check 1

Characters
(character string display)

Numeric values

25%

(numeral display)

Touch
switches

Lamps

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.

Circle SectorArc

Polyline Polygon Rectangle

16

* A continuous straight line with

up to 256 points can be drawn.

* A polygon with up to 255

vertices can be drawn.

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 contain 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.

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

Library data contain 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.

Mark Image data Library data

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 guide characters: 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 guide characters can be displayed.

Normal (Standard) Lamps

ON

ON

Unlit state Lit state

Host

Image/Library Lamps

ON

Unlit state Lit state

Host

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

17

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

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: 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.

Touch
switch area

Display
frame

When this
position is
pressed...

Function executed

Shown
in
reverse
video

There are four standard touch-switch guide characters: 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 guide characters can be displayed.

Numeral Displays

Numeric values stored in the numeral memory table entries are displayed. The
displayed numerals can be changed by changing the data stored in the numeral
memory table entries.

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.

18

String Displays

Character strings stored in the character string memory table entries are dis­played. The displayed character strings can be changed by changing the data
stored in the character string memory table entries.

Numeral Inputs

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 notified to the
host.

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

12345678

Input

7 8 9
4 5 6
1 2 3



0 .

Window

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

String Inputs

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 entry and notified to the host.

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

Character string setting input field

Display

NT31

Input

NT21 NT31

NT631

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 entry and notified 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 table entries. There are the following four types.

Bar Graphs

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

60%

Analog Meters

Analogue meters display, using a quarter, half, or full circle shape, the present
value in a numeral memory table entry 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.

60%

Broken Line Graphs

Broken line graphs display, in an easy-to-read form, a sequence of numeral

19

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

memory table values converted to a percentage within the range –100% to
+100% of a preset value.

100%

0%

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

–100%

display sign)

Trend Graphs

Trend graphs display chronological changes in the value in a numeral memory
table entry, 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 entry 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.

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 table entries are monitored, and mes­sages (contained in the character string memory table) set for bit memory table
entries that come ON are displayed.

For the alarm history, bit memory table entries 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 entry.

The NT21, NT31/NT31C, and NT631/NT631C allow selection of the display or­der for the newest record first or 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. (Optional Bat­tery required for NT21.)

• Alarm list

20

Message (character string table entry 32)
set for bit memory table entry 14

Character string table entry 32

Image/library
data 113C

When the message displayed is pressed, the image/library
data (113C) set for bit memory table entry 14 is displayed.

Character string table entry 50
Image/library data 1002

Character string table entry 32
Image/library data 113C

Character string table entry 54
Image/library data 1125

No.13

No.14

No.15

Bit

0
1
0

A000000
L001003
D010015

HOST

1(ON)

• Alarm history

Message (character string table entry 13)
set for bit memory table entry 24

Character string table entry 13

Character string table entry 12

Image/library

data 102B

Character string table entry 11
Image/library data 005F

Character string table entry 12
Image/library data 102A

Character string table entry 13
Image/library data 102B

When the upper message displayed is pressed, the image/library
data (102B) set for bit memory table entry 13 is displayed.

No. 22

No. 23

No. 24

Recorded data

Bit memory table entry 24
97/12/04 11:19:20

Bit memory table entry 23
97/12/04 11:25:12

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C

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.

21

1-3 System Configuration

This section shows the configuration of a system that uses an NT21,
NT31/NT31C and NT631/NT631C. For details on product models, refer to the
Setup Manual.

1-3-1 Peripheral Devices That Can Be Connected

NT21

The following peripheral devices can be connected to an NT21.

Host

Controls the NT21 as required while controlling machines and monitoring the
production line.

Host Link: CS/CJ-series PCs, C-series PCs, CVM1/CV-series PCs, 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 PCs, CPM1, CQM1, C200HS, C200HX/HG/HE(-ZE),

CVM1/CV-series PCs, SRM1

Can be connected to CPU Units and SRM1. However, connection is not

possible to some models.

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

Personal computer

Running Windows 95/98/NT

Bar code reader

Bar codes can be read
as character strings.

RS-232C cable
(15 m max.)

An RS-422A/485 cable
(500 m max.) can be
connected through an
RS-232C/RS-422A Link
Adapter.

1-3SectionSystem Configuration

NT Support Tool

Used to create screens for the NT21
at the personal computer and transmit
them to the NT21, and to make NT21
settings.

Memory Unit

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

System installer

Used to change the system
program of the NT21.

NT21

Displays production line monitoring and
commands to the operation site, and
notifies the switch ON/OFF status and
numeric value inputs to the host.

When a 1:N NT Link is being used, up to
8 PTs can be connected to a single PC.

• Bar Code Reader

V520-RH21-6 (made by OMRON)

• Memory Unit

NT-MF261 (made by OMRON)

• NT Support Tool

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

• NT-ZJCAT1-EV4 (CD-ROM version for IBM PC/AT and compatible com-

puters)

• System Installer

System Installer (made by OMRON)

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

22

Reference: The following optional devices are available.

Reflection-suppressing Protective Sheets (5) NT20S-KBA04
Chemical-resistant cover NT20S-KBA01
Battery C500-BAT08

NT31/NT31C and NT631/NT631C

The following peripheral devices can be connected to the NT31/NT31C and
NT631/NT631C.

Bar code reader

Bar codes can be read
as character strings.

RS-232C cable
(max. 15 m)
or

Printer

For printing out the currently
displayed NT31/NT31C or
NT631/NT631C screen.

Memory Unit

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

NT31/NT31C or NT631/NT631C

Displays production line monitoring and instructions to the
operation site, and notifies the switch ON/OFF status and
numeric value inputs to the host.

When a 1:N NT Link is being used, up to 8 PTs can be
connected to a single PC.

RS-422A/485 cable
(max. 500 m)

1-3SectionSystem Configuration

Host

Controls the NT31/NT31C or NT631/NT631C as required while controlling
machines and monitoring the production line.

Host Link: CS/CJ-series PCs, C-series PCs, CVM1/CV-series PCs, 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 PCs, CPM1, CQM1, C200HS, C200HX/HG/HE(-Z)E,

CVM1/CV-series PCs, SRM1

Can be connected to CPU Units and SRM1. However, connection is not

possible to some models.

Memory Link

Can be connected to a personal computer, FA computer, etc.

Other companies’ PCs can also be connected.

Personal computer

Running Windows 95/98/NT

Support Tool

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

System installer

Used to change the system
program of the NT31/NT31C
or NT631/NT631C.

• Bar code reader

V520-RH21-6 (made by OMRON)

• Recommended printers

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).

If using an HP printer, make sure that it conforms to the PCL5 standard.

• Memory Unit

NT-MF261 (made by OMRON)

• Support Tool

NT-series Support Tool Version 4. for Windows (made by OMRON)

• NT-ZJCAT1-EV4 (CD-ROM version for IBM PC/AT and compatible com-

puters)

23

• System installer

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 the NT31 or NT31C.

Anti-reflective Film (5 sheets) NT30-KBA04
Chemical-resistant Cover NT30-KBA01
Replacement Battery C500-BAT08

 The following products are available as options for the NT631/NT631C. All of

these options can be used for either the NT631 or the NT631C.
Anti-reflective Film (5 sheets) NT610C-KBA04
Chemical-resistant Cover NT625-KBA01
Replacement Battery C500-BAT08

1-3-2 Connecting to the Host

1-3SectionSystem Configuration

NT21

NT31/NT31C

The NT21 has the following two communication ports.

• Serial port A:

D-Sub 9-pin connector (female)

RS-232C only (The NT Support Tool and bar code readers can be connected

here, as can an NT-AL001 RS-232C/RS-422A Link Adapter.)

• Serial port B:

D-Sub 9-pin connector (female)

RS-232C (The NT Support Tool and bar code readers cannot be connected

here, as can an NT-AL001 or NS-AL002 RS-232C/RS-422A Link Adapter.)

The host can be connected at either of these two ports.
Refer to the Setup Manual for information on types of communications for the PT

and host.

The NT31/NT31C has the following two communication ports.

• Serial port A:

D-SUB 9-pin connector (female)

For RS-232C use only (The Support Tool and bar code readers can be con-

nected here.)

• Serial port B:

D-SUB 25-pin connector (female)

24

For RS-232C or RS-422A/485 (Selectable by memory switch)

(The Support Tool and bar code readers cannot be connected here.)

The host can be connected at either of these two ports.
The connection methods for each communication method at the PT and host

sides are indicated below. Make the settings in accordance with the communica­tion method that can be used with the PC to be connected and the conditions at
the operation site.

Reference: When using an RS-232C/422A Adaptor (NT-AL001) with the host link or 1:1 NT

Link communication method, RS-485 cannot be used. The connection must be
made with RS-232C or RS-422A.

1-3SectionSystem Configuration

NT631/NT631C

The NT631/NT631C has the following two communication ports. (Serial port B
has an RS-422A/485 terminal block as well as an RS-232C connector; use the
memory switch to select the serial communications method.)

• Serial port A:

D-SUB 9-pin connector (female)
For RS-232C use only (The Support Tool and bar code readers can be con­nected here.)

• Serial port B: Use the memory switch to select RS-232C or RS-422A/485.

Communications Connection Notes

RS-232C

RS-422A/485 Terminal block ---

D-SUB 9-pin connector
(female)

Cannot be used for Support Tool
or bar code reader.

The host can be connected at either of these two ports.
The connection methods for each communication method at the PT and host

sides are indicated below. Make the settings in accordance with the communica­tion method that can be used with the PC to be connected and the conditions at
the operation site.

Reference: When using an RS-232C/422A Adaptor (NT-AL001) with the host link or 1:1 NT

Link communication method, RS-485 cannot be used. The connection must be
made with RS-232C or RS-422A.

25

1-4 Communications with the Host

The NT21, NT31/NT31C, or NT631/NT631C is connected to the host by one of
the following four communication methods.

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

• Host link

• 1:1 NT Link

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

The following communications can be used to connect another companies’ PC:

• Communications protocol supported by the other company’s PC

(NT31/NT31C or NT631/NT631C only)

The following communications can be used to connect RS-232C/RS-422 de­vices, such as factory computers:

• Memory links
In all of these communication methods that can be used with NT21,

NT31/NT31C, or NT631/NT631C, data communication with host is 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 section 1-5 Communication by
Memory Link.

1-4SectionCommunications with the Host

1-4-1 Direct Connection Function

With the NT21, NT31/NT31C, or NT631/NT631C, the bits and words used to ac­cess data required for display, and those for storing input data, can be allocated
in any part of the PC memory area.

The NT21, NT31/NT31C, or 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 statuses to the host.

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

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 PT to be
read from the memory area in the PC and written to memory table entries in the
PT. Also, the data input at the PT can be written to the memory area in the PC.
The PT screen can be changed in accordance with statuses in the PC memory
area, and the PT’s status data can be written to the PC’s memory area.

PCPT

DM Area IR/CIO Area

Features of the Direct
Connection Function

26

AR Area Timer/Counter Area

The direct connection function has the following features.

• The bits and words used to access operating status and work instruction in-

formation and those for storing input data can be freely allocated in almost any
area of the PC memory.

• Since the PT can directly access PC bit and word data without using the pro-

gram at the PC, it can be connected to the PC without changing the PC pro­gram that controls the currently running production line.

1-4-2 Host Link

Reference: The CPU Unit cannot be changed to RUN mode when the PT is connected to a

1-4-3 NT Link

Features of the NT Link

1-4SectionCommunications with the Host

• The area to control and notify the PT statuses, including display screens, dis-

play/no display status, and buzzer output, can be freely allocated in any part of
the PC data area. This means that the PC status can be read and controlled
just by reading this area at the PC side, without preparing a special commu­nication program.

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

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 communication. This method can be
used for connection to the majority of PC models.

PC using Host Link communications. Use a C200H-PRO27 or CQM1H-PRO01
Programming Console. The Programming Console will display a password input
screen when the Programming Console is switched to specify RUN mode. To
switch the CPU Unit to RUN mode using communications, change the commu­nications mode with the PT to NT Link mode.

NT Link is a method for high-speed communication with a PC using the direct
connection function. The PCs that can be connected with the NT Link are as fol­lows:

CPM1, CPM2A, CPM2C, CQM1, CQM1H, C200HS, C200HX/HG/HE(-Z)E,
CS1G/H/D, CJ1G/H/M, CVM1/CV-series PC (-EV1 or later version), SRM1

Besides the 1:1 NT Link method, in which one PC is connected to one PT, the
NT21, NT31/NT31C, and NT631/NT631C can also use the 1:N connection NT
Link method, which allows a maximum of eight PTs to be connected to one PC
port.

PCs that can be connected with the 1:N connection NT Link method are as fol­lows: CQM1H, C200HX/HG/HE(-Z)E, CS1G/H/D, CJ1G/H/M.

The NT21, NT31/NT31C, and NT631/NT631C also support OMRON’s high­speed 1:N NT Link that provides faster 1:N communications. The only PCs that
support the high-speed 1:N NT Link are the -EV1 and higher versions of the
CS1G/H/D, CJ1G/H/M.

In the following sections, the term NT Link is used to refer to the NT Link commu­nication 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.

The NT Link has the following features.

• High-speed communications with specific models of PCs can be executed.

The NT21, NT31/NT31C, and NT631/NT631C also support OMRON’s high­speed 1:N NT Link.

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

This enables the other bits of words allocated for a touch switch 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 for touch switches in the DM Area cannot be used for other
purposes.

• The NT Link can be used even when the PC is in the RUN mode. (When the

host link method is used, the PT switches to the monitor mode when the PC is
in the RUN mode.)

27

1-4SectionCommunications with the Host

• In the case of PTs that support the standard 1:N NT Link (NT20S, NT21, NT30,

NT30C, NT31, NT31C, NT600S, NT620S, NT620C, NT625C, NT631,
NT631C) up to 8 PTs can be connected to one port of the PC and used at the
same time. Up to 8 PTs (NT21, 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 PC port must use either the standard or high­speed 1:N NT Link; the two communications systems cannot share a single
port.

• When using a C200HX/HG/HE(-Z)E PC and standard 1:N NT Links, up to

three 1:N NT Link systems (i.e., 24 PTs) can be connected by installing a com­munication board in the option slot of the CPU. For details on the communica­tion board, refer to the SYSMAC Serial Communications Board Operation
Manual (W304-E1-).

• When using a CQM1H PC 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 Manual (W365-E1-).

• When using a CS1G/H/D PC, multiple 1:N NT Link systems (standard or high-

speed) can be connected by installing a Serial Communications Board in the
Inner Board slot. When using a CS1G/H/D or CJ1G/H/M PC, multiple 1:N NT
Link systems can be connected by installing a Serial Communications Unit on
the Backplane. For details on the Communications Board/Communications
Unit, refer to the CS/CJ Series Serial Communication Board/Unit Operation
Manual (W336-E1-).

• If the PC being used supports the Programming Console function, the NT21,

NT31/NT31C or NT631/NT631C can be used as a Programming Console.

• If the PC being used supports the Device Monitor function, the NT31/NT31C or

NT631/NT631C can be used to change the PC’s operating mode and read/
change data in the PC’s memory areas. (The NT21 does not support the de­vice monitor function.)

The NT Link is compatible with the host link. The PT screen data and PC pro­grams used with the host link direct connection method can be used with the NT
Link method as they are.

1-4-4 Functions of the Allocated Bits and Words

Words and bits in the PC can be allocated to elements displayed on the PT and
PT status when using the direct connection function. By changing the contents
of the bits and words, the PT can be controlled from the PC. It is also possible to
send data to the PC by pressing touch switches at the PT.

Controlling the PT from
the PC

28

The following PT functions can be controlled from the PC.

• Screens:

Display of designated screens, confirmation of screen numbers, etc.

• Memory table:

Writing to a memory table entry, copying from a memory table entry to anoth­er memory table entry, etc.

• Lamps:

Display instructions, confirmation of display status, etc.

• Touch switches:

Display instructions, confirmation of display status, enable/disable opera­tions, etc.

• Numeric inputs, character string inputs, thumbwheel switch inputs:

Enable/disable inputs, etc.

• System control:

Buzzer ON/OFF, display/no display status, screen printing, window open/
close status, and other PT status

1-4SectionCommunications with the Host

Notification from the PT
to the PC

Functions of Display Elements

Data in the PT is sent to a PC when, for example, a touch switch is pressed. The
following 5 types of data are sent to a PC.

• PT status, screen number of currently displayed screen

• The status of touch switch inputs

• Numeric values and character string input with the numeral/character string

setting function using touch switches or a bar code reader.

• Changes in memory table entries after copying between memory table entries,

etc.

• Numerical results of calculations from the mathematical function

Lamps (page 112)

Allocated: Bit

PT

Lamp #1 (Bit 000100)

Lit

Unlit

PC

Switch 1: ON (Bit 000100)

Switch 2: OFF (Bit 000101)

Lamp #2 (Bit 000101)

The PC’s bit status is displayed by the lamp at the PT.

Normal (standard) lamps come on (flash) when the PC’s bit status (lamp bit) is
ON (1), and go off when it is OFF (0).

With image/library lamps, the displayed image or library data can be switched in
accordance with the ON (1)/OFF (0) status of PC bits (lamp bits).

Touch Switches (page 119)

Allocated: Bit (lamp bit, notification bit, or interlock bit)

PC

009012

1

Touch switch #12
Bit 009012

PT

Bit 009012: ON

The lamp comes on (flashes) when the PC’s bit (lamp bit) is ON (1) and goes
OFF when it is OFF (0). When the touch switch is pressed, the PC’s notification
bit comes ON (1) or goes OFF (0).

The interlock function can also be used. An operation is enabled only while the
corresponding interlock bit allocated in the PC is ON.

29

Numeral Display or Graph (Numeral Memory Table) (page 140)

Allocated: Word

1-4SectionCommunications with the Host

PC

TIM003

Wd 0005

1 6 1 2

A 2 3 C

Numeral memory
table entry 1
(TIM003)

PT

1612

A23C

Numeral memory table entry 150 (Wd 0005)

Allocate any desired words in the PC for numeral memory table entries. If the
contents of the allocated words are changed while the numeral memory table
data is being displayed on the screen as numeric values or lamps, the display on
the screen will also change automatically. This function allows the contents of
allocated words to be monitored easily.

Reading and writing are executed so that the contents of allocated words are
always the same as those of the numeral memory table entries.

Character String Display (Character String Memory Table)
(page 148)

Allocated: Word

PT

abcdef

Character string memory table entry 1
Number of allocated words: 3
First word: DM0100

PC

DM0100

DM0101

DM0102

6 1 6 2

6 3 6 4

6 5 6 6

(“a”, “b”)

(“c”, “d”)

(“e”, “f”)

Allocate any desired words in the PC to character string memory table entries. If
the contents of the allocated words are changed while the character string
memory table data is being displayed on the screen as text, the corresponding
display on the screen will also change automatically. This function allows any
desired message to be displayed easily.

Reading and writing are executed so that the contents of allocated words are
always the same as those of the character string memory table entries.

Numeric and Thumbwheel Inputs (Numeral Memory Table) (page 192, 200)

Allocated: Word

Bit (interlock bits)

Numeric input

Numeral memory
table entry 52
(DM 1000)

Thumbwheel Switch

Numeral memory table entry 53 (IR 0012)

DM 1000

IR 0012

9 5 1 1

C 0 1 8

Allocate any desired words in the PC to the numeral memory table entries. When
a value is input or changed with the numeric input or thumbwheel switch, the new
value will be written to the numeral memory table entry and the contents of the
words allocated in the PC will be changed automatically. This function allows
word PVs to be changed easily from the PT.

30

1-4SectionCommunications with the Host

The interlock function can also be used. The numeric and thumbwheel switch
inputs are enabled only while the corresponding interlock bits allocated in the PC
are ON.

Character String Input (Character String Memory Table) (page 210)

Allocated: Word

Bit (interlock bits)

DM 0150

ABCDEF

Character string input

Character string memory table entry 100
Number of allocated words: 3
First word: DM 0150

DM 0151

DM 0152

4 1 4 2

4 3 4 4

4 5 4 6

Allocate any desired words in the PC to character string table entries. When text
is input with a character string input, the new character string will be written to the
character string memory table entry and the contents of the words allocated in
the PC will be changed automatically. This function allows text to be written from
the PT to the PC easily.

The interlock function can also be used. The character string input is enabled
only while the corresponding interlock bit allocated in the PC is ON.

Alarm List (Bit Memory Table) (page 182)

Allocated: Bit

(“A”, “B”)

(“C”, “D”)

(“E”, “F”)

PT

Material low

Character string memory table entry 120

Alarm list

Character string memory table entry 120

Material low

Bit memory table entry 23

Bit 010009

PC

1010009

When the PC bit comes ON (1), the contents of the character string memory
table entries registered for the bit memory table entries are displayed in the
alarm list. When the bit returns to the OFF (0) status, the character string
memory table display is automatically cleared.

31

Alarm History (Bit Memory Table) (page 182)

Allocated: Bit

1-4SectionCommunications with the Host

PT

Water temp. high

Alarm history

Character string memory table entry
134

Water temp. high

Bit memory table entry 52

Character string memory table entry 134

Alarm history record data

Bit 015012

PC

1015012

The PC bit allocated to the bit memory table entry for which the history property
has been set is continually monitored: when the bit turns ON (1), the time, the
number of times, and the contents of the character string memory table entry
registered for the bit memory table entry are recorded in the alarm history record
data.

This record data can be displayed as the alarm history.

PT Status Control Area
(PC ↔ PT)

PT Status Notify Area
(PT to PC)

The PT status control area is used to control the PT status. When data is written
to this area in the PC, the PT reads the contents and operates according to the
contents.

Example of PT Status Control Area Application

When data is written to the PT status control area, the PT operates as shown
below (page 52).

PC

PT status control area

0003
0050
1007
A000

Screen switch setting

Memory table entry

Copy setting

PT status control bits

System reserve

Continuous
buzzer
sound

Copy

PT

Screen 3 display

Numeral memory table entry 50

Numeral memory table entry 7

The PT status notify area is used to notify the changes in the PT status.

When the PT status changes, the change is written to this area in the PC. By
reading the data from this area, the PT status can be checked.

32

1-4SectionCommunications with the Host

Example of PT Status Notify Area Application

When the PT status changes, the change is applied to the PT status notify area
as shown below (page 61).

Reference: When the PT is set to NT20S or NT30/620 compatible mode, the word configura-

Functions of the Window
Control Area
(PC to and from PT)

PT

12345678

7 8 9
4 5 6
1 2 3
0 .

Numeral memory table entry 13

1 2 3 4 5 6 7 8

PC

PT status notify area

0013
8800

Allocated word (numeral table entry 13)

12345678

5 6 7 8

1 2 3 4

Content upgrade memory table entry

PT status

Start
Start + 1

tion is identical to that of the earlier NT20S, NT30, NT30C, NT620S, NT620C,
and NT625C PTs.

The window control area is used to notify and control the window status. The
window control area has areas that correspond to three windows. Each area
stores the screen number, and the X and Y coordinates of the lower left corner of
the window that is being displayed.
When data is written to this area in the PC, the PT reads the contents and
executes tasks such as switching the windows to be displayed or moving the
position of the windows according to the contents (page 241).
When the window display status changes, the change is written to this area in
the PC. By reading the data from this area, the window display status can be
checked (refer to page 241).

If the window functions are not used, it is not necessary to allocate a window con­trol area in the host.

Example of Window Control Area Application

When data is written to the window control area, the PT operates as shown be­low.

Window
(screen No.34)
Opens

PT

PC

WIndow control area

(local window 2)

0034
0020

0079

Screen number

X coordinate

Y coordinate

Bottom left coordinate
(20, 79)

When the window display status changes, the change is notified to the window
control area as shown below (Window’s Opening/Closing status is notified to the
PT status notify area as well).

Move

PT

Window
(screen No.34)

Bottom left coordinate
(140, 119)

PC

PT status notify area

WIndow control area

(local window 2)

0034
0140

0119

Screen No.

X coordinate

Y coordinate

33

1-4-5 Clock Data Area (PC to PT) (NT21 Only)

The NT21 does not have a built-in clock and instead uses the clock data from the
PC. The seconds, minutes, hour, day, month, year, and day of week data is read
from the PC into a Clock Data Area.

The NT21 periodically updates the data in the Clock Data Area, storing the data
in numeral table entries 247 to 253. These table entries are used to read the
clock data. When displaying the time or date on the NT21 or when using the
screen display history or alarm history, allocate the Clock Data Area in PC
memory and periodically update the contents of the allocated words in the PC
using the PC’s ladder diagram. (The structure of the clock data in the NT21 is the
same as the structure of the words containing the clock data in the PC. If these
words are allocated for the Clock Data Area, then periodic updating from the lad­der diagram is not necessary.

1-4SectionCommunications with the Host

PCPT

2001/9/25

13:47:58

Numeral table

247

248

249

250

251

252

253

58

47

13

25

9

1

2

1-4-6 Connecting to other Companies’ PCs

Installing a system program for multi-venders by using a specific system installer
enables the NT31/NT31C or NT631/NT631C to be connected to the PCs of oth­er companies in direct connection. This system installer is supplied with the Sup­port Tool (NT-ZJCAT1-EV4). (The NT21 does not support this function.)

Clock Data

4758

2513

0109

0002

Minutes and seconds

Day and hour

Year and month

Day of week

Compatible PCs

34

The NT31/NT31C and NT631/NT631C can be connected to the following Mitsu­bishi PCs.

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

• Mitsubishi FX-series programmable controller

• SLC500 Series by Allen-Bradley

• 90-20 and 90-30 Series by GE Fanuc

• S7-300 and S7-400 Series by Siemens

• TSX Series by Modicon

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

1-5 Communication by Using Memory Links

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

1-5-1 Memory Link

The memory link is a method to send and receive data between a personal com­puter or a FA computer and the PT by using RS-232C/422A communication.

In memory link, there is an area called the PT Memory, as shown below, inside
the PT, and this area is treated as a virtual area on the PC. This allows PT
memory and the display elements of the PT to make a quasi-direct connection.
By sending a command for the memory link, the host can make the PT 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.

1-5SectionCommunication by Using Memory Links

Numeral
memory
table

Lamp

NT31/NT31C
PT

PT memory

Direct connection

RS-232C/422A
communication

PC

In the memory link method, the only difference is that the PT finds its commu­nication 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 NT21, NT31/NT31C,
and 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.

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

• The following strobes of PT status notify bits do not turn ON (page 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:

• In the memory link method, the communication 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 communication means,
allowing the PT to be suited for larger usage.

35

• Actual PCs have many kinds of areas, where as PT memory is a single area.

When creating screen data by using the memory link methods, it is always nec­essary to allocate PT memory to display parts.

For communication between the host and the PT by the memory link method,
refer to Section 4 Using Memory Link, and for how to use screen and display
elements, refer to Section 3 How to Use the PT.

1-5-3 Memory Link Online Transfer Function

When memory link communications are being used, the PT can be switched to
Transmit mode from the host and screen data can be written even if the PT is
operating. (The PT 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 4-4 Memory
Link Online Transfer Function.

1-5SectionCommunication by Using Memory Links

36

1-6 Before Operating

Follow the procedure given below to start the system of the NT21, NT31/NT31C,
or NT631/NT631C.

1-6SectionBefore Operating

Host

Set the host settings.

Connect to the NT21,
NT31/NT31C or
NT631/NT631C.

NT21, NT31/NT31C,
or NT631/NT631C

Install the PT in the
operation panel.

Connect the power supply
and peripherals.

Install the system program.

Make the settings in the
system installer mode.

Transmit the screen data.

Set the memory switches.

Connect to the host.

*2

Support Tool

Install the Support
Tool at the computer.

(refer to the manual for
the Support Tool)

*1

Create the screens.

(refer to Sections 2
through 5 and the
Support Tool manual)

Confirm the settings and

Create the host program.

Start operation.

check communication.

*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 PC
models (sequencers), however, it is necessary to install specific system programs.

*2: Display of the system menu, and all change operations, can be disabled to prevent

the accidental deletion or alteration of screens and settings.

Reference:  For the system program, use the NT21, NT31/NT31C, or NT631/NT631C sys-

tem program supplied as an accessory with the NT-series Support Tool (NT-

ZJCAT1-EV4).

 The following products are available as options for the NT631/NT631C. All of

these options can be used for either the NT631 or the NT631C. For the Support

Tool, use NT-series Support Tool for Windows 95/98 (Ver. 4.).

Refer to the following manuals for the Units and software.

37

Equipment or Software Manual Title Manual Number

gg

NT21 Setup Manual

NT31/NT31C Setup Manual

NT631/NT631C Setup Manual

System Installer

Support Tool

PC SYSMAC CPM1 Operation Manual

CompoBus Master Con­trol Unit

Programming Devices SYSMAC Support Software Operation Manual: C-series PCs

Host Link Unit/
Communications Board

NT-series Support Tool for Windows 95/98 (Version 4.) V061-E1-

NT-series Support Tool for Windows 95/98 (Version 4.) V061-E1-

SYSMAC CPM1A Operation Manual

SYSMAC CPM2A Operation Manual

SYSMAC CPM1A/CPM2A/CPM2C/SRM1(-V2) Programming Manual

SYSMAC CPM2C Operation Manual

SYSMAC C200H Operation Manual (for CPU01/03/11) (programming)

SYSMAC C200H Operation Manual (for CPU21/23/31) (programming)

SYSMAC C200HS Installation Guide

SYSMAC C200HS Operation Manual (programming)

SYSMAC C200HX/HG/HE-Z Installation Guide

SYSMAC C200HX/HG/HE Programming Manual

SYSMAC C200HX/HG/HE-Z Programming Manual

SYSMAC C1000H/C2000H Operation Manual (programming)

SYSMAC CQM1 Programming Manual

SYSMAC CQM1H Operation Manual

SYSMAC CQM1H Series Serial Communications Board Operation
Manual

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

CS Series Programmable Controllers Operation Manual

CJ Series Programmable Controllers Operation Manual

CS/CJ/NSJ Series Programming Manual

CS/CJ/NSJ Series Instructions Reference Manual

CS/CJ Series Programming Consoles Operation Manual

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

CS/CJ Series Serial Communications Boards/Units Operation Manual

SRM1 Operation Manual

SYSMAC Support Software Operation Manual: CVM1 PCs

SYSMAC CPT Operation Manual

CX-Programmer Operation Manual

SYSMAC C Series Host Link Unit Operation Manual

SYSMAC CVM1/CV Series Host Link Operation Manual

SYSMAC
C200HW-COM01 C200HW-COM02-V1 to C200HW-COM06-EV1
Communications Boards Operation Manual

V068-E1-

V062-E1-

V063-E1-

W262-E1-

W317-E1-

W352-E1-

W353-E1-

W356-E1-

W130-E1-

W217-E1-

W236-E1-

W235-E1-

W302-E1-

W303-E1-

W322-E1-

W140-E1-

W228-E1-

W363-E1-

W365-E1-

W202-E1-

W339-E1-

W393-E1-

W394-E1-

W340-E1-

W341-E1-

W342-E1-

W336-E1-

W318-E1-

W248-E1-

W249-E1-

W332-E1-
W333-E1-

W446-E1-

W143-E1-

W205-E1-

W304-E1-

1-6SectionBefore Operating

38

This section describes the functions of the PT.

2-1 PT Screens 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-1 Screen Composition 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-2 Screen Numbers 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-3 Screen Types 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-4 Screen Attributes 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-5 Display Colors 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-6 Display Elements 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Areas for Control/Notification 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-1 PT Status Control Area (Host ↔ PT) 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-2 PT Status Notify Area (PT to Host) 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-3 Window Control Area (Host ↔ PT) 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-4 Clock Data Area (Host to PT, NT21 Only) 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 Memory Tables 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-1 Numeral Memory Table 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-2 Character String Memory Table 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-3 Bit Memory Table 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4 Fixed Displays 90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4-1 Circles, Arcs, Sectors, Polylines, Polygons, Rectangles

(Fixed Displays) 90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4-2 Text (Fixed Display) 98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4-3 Tiling 101. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4-4 Marks 103. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5 Image and Library Data 106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5-1 Image Data Display 106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5-2 Library Data Display 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6 Lamps 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-7 Touch Switches 119. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-8 Numeral Display 140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-9 Character String Display 148. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10 Graphs 154. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10-1 Bar Graphs 154. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10-2 Analog Meter 158. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10-3 Broken Line Graphs 164. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10-4 Trend Graphs 170. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-11 Alarm List, Alarm History 182. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12 Inputting Numeric Values 192. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12-1 Numeric Key Type (Numeral Input) 192. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12-2 Thumbwheel Type (Thumbwheel) 200. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-13 Inputting Character Strings 210. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14 Recipes 216. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-1 Function Outline 216. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-2 Operation Outline 221. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-3 Limits 226. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-4 Common Attributes 227. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-5 Display Functions 235. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-6 Input Functions 235. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-7 Output Functions 235. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14-8 Relationship with Other Elements 236. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

PT Functions

39

2-15 Window Function 237. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-1 What Are Windows? 237. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-2 Window Type 238. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-3 Window Screens and Display Elements 239. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-4 Opening/Closing and Moving a Window 239. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-5 Size and Display Position of a Window 241. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-6 Changing the Displaying Order of Windows 241. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-7 Checking the Display Status of a Window 242. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-8 Temporary Input Fields 242. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15-9 Focus Window 243. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16 Special Functions 244. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16-1 Display History Record Function 244. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16-2 Alarm History Record Function 246. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16-3 Resume Function 249. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16-4 Screen Saver Function 249. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16-5 Buzzer Function 250. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16-6 Clock Function 251. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16-7 Print Function (NT31/NT31C or NT631/NT631C Only) 253. . . . . . . . . . . . . . . . . . .

2-16-8 Adjusting Contrast and Brightness During PT Operation 255. . . . . . . . . . . . . . . . . . .

2-16-9 Programming Console Function 257. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17 Device Monitor Function 259. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17-1 Compatible Systems 259. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17-2 Device Monitor Screens and Functions 260. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17-3 Starting and Exiting Device Monitor 260. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17-4 Operations Common to the Device Monitor Screens 262. . . . . . . . . . . . . . . . . . . . . .

2-17-5 Using the Registration Monitor Screen 263. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17-6 Using the Continuous Monitor Screen 270. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17-7 Using the Error Log Screen 274. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-17-8 Errors Occurring during Device Monitor Operation 276. . . . . . . . . . . . . . . . . . . . . . .

2-18 Mathematical Function 278. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-18-1 Executable Calculations 278. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-18-2 Data Flow in Calculations 281. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-18-3 Precautions When Using the Mathematical Function 282. . . . . . . . . . . . . . . . . . . . . .

2-19 PT Configuration Settings 284. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-19-1 PT Configuration Settings 284. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section

40

2-1 PT Screens

This section describes the PT screens, which are the basis of PT functions.

2-1-1 Screen Composition

The size of the NT21, NT31/NT31C and NT631/NT631C screens are as follows:

NT21: 260 dots wide by 140 dots high
NT31/NT31C: 320 dots wide by 240 dots high
NT631/NT631C: 640 dots wide by 480 dots high

The location of each dot is expressed by Cartesian coordinates: an X coordinate
(horizontal direction) and a Y coordinate (vertical direction). The coordinate ori­gin (0, 0) is at the top left of the screen.

2-1SectionPT Screens

NT21

X coordinate (horizontal direction)

0

0

Coordinates (X, Y)



139

Y coordinate (vertical direction)

259

259,139

0

239

Y coordinate (vertical direction)

2-1-2 Screen Numbers

The screens of the PT are classified and managed by screen numbers.
Screen numbers are used to designate the first screen displayed when the PT is

started up, and to designate the objective screen when switching the screen dis­play, etc.

The PT allows up to 3999 screens to be registered, apart from those screens
reserved for specific functions. For these 3999 screens, screen numbers can be
designated without restriction within the range 1 to 3999. There are also no re­strictions on the order of screen numbers, they can be discontinuous either.

When creating a screen at the PT with the Support Tool, designate a screen
number and then register the display elements.

NT31/NT31C NT631/NT631C

X coordinate (horizontal direction)

0

Coordinates (X, Y)



319

319,239

0

Y coordinate (vertical direction)

479

X coordinate (horizontal direction)



Coordinates (X, Y)

6390

639,479

2-1-3 Screen Types

Normal (Standard)
Screens

The screens that can be displayed by the PT are classified as follows according
to their function:

• Normal (standard) screens

• Overlapping screens

• Window screens

• System screens

Normal (Standard) screens are the basic screens of the PT. There are no specif­ic functions themselves and their purpose is to display elements that have al­ready been registered.

Normal (Standard) screens can be registered under any screen numbers in the
range 1 to 3999.

41

2-1SectionPT Screens

Overlapping Screens

The PT allows up to 8 screens to be displayed overlapped as one screen. A
group of overlapped screens is called overlapping screens.

To allow distinction, the screen onto which the multiple component screens are
overlapped is called the parent screen and the individual component screens
are called the child screens.

Both parent screens and child screens can be registered under any screen num­bers in the range 1 to 3999. Note that a new screen must be designated as a
parent screen.

Parent screen Child screen

Screen No. 8

This are
overlapping
screens.

Screen No. 10

This are

Screen No. 7

overlapping

Screen No. 25

screens.

Child Screen Registration and Display Result

Child screens are created as normal (standard) screens. Therefore they can
also be displayed independently by designating their screen numbers.

Parent screens are special screens used for the purpose of displaying overlap­ping screens. They are created by designating a new screen as a parent screen
at the Support Tool. Register only the screen numbers of the child screens to be
overlapped for this new screen. Direct registration of elements on a parent
screen is not possible.

To display overlapping screens on the PT, designate the screen number of the
parent screen. The child screens will be displayed in the order they were regis­tered (i.e., the first one registered will be the bottom-most screen) to build up the
compound image.

Note that the order in which the child screens are registered may affect the way
that overlapped screens are displayed.

Registration order:

Child screen 1

Child screen 1 → Child screen 2

42

Registration order:

Child screen 2

Child screen 2 → Child screen 1

Restrictions on Overlapping Screens

Note the following points, when creating overlapping screens.

• Numeral input and character string input fields, which allow the input of numer-

ic values and character strings, can each only be set on one of the child

2-1SectionPT Screens

screens. (Thumbwheel switches can be used but temporary input fields can­not.) For details on numeral input, refer to 2-12 Inputting Numeric Values (page

192), and for details on character string input, refer to 2-13 Inputting Character
Strings (page 210).

• Arrange the touch switches registered for each child screen, so that they do not

overlap on the parent screen. If touch switches are overlapped, the intended
operation may not be performed when a touch switch is pressed.

• On overlapping screens, the screen attributes of the child screens are invalid

and the screen display is governed by the attributes of the parent screen. For
details on screen attributes, refer to 2-1-4 Screen Attributes (page 45).

Window Screens

Apart from the normal (standard) screen display method, which a screen is dis­played over the entire panel area, the PT also allows screens to be displayed in
one part of the screen area only. This partial screen is called a window. and a
screen on which a window is displayed is called a window screen.

Window screens can be registered under any screen numbers 1 to 3999. How­ever, screens that are registered as window screens cannot be displayed inde­pendently like normal (standard) screens.

Base screen



9

8

7

.

6

5

4

0

3

2

Keypad

Touch switch for opening
the window

Window screen



9

8

7

.

6

5

4

0

3

2

1

Keypad

1

Window displayed on the screen
at the registered size and position

Window area

Windows can be called anytime, regardless of which screen is currently dis­played. It is possible to display multiple windows (max.: 3) on the same screen,
and to open, close or move windows by the control from the host.

With PT, up to three windows can be displayed at the same time.
One of these windows is called a global window. This window can be displayed

all the time, regardless of which screen is currently displayed.
Other two windows are called local windows. These windows can be displayed

by linking to the currently displayed screens. When the screen is switched, the
local window is closed automatically.

For details, refer to 2-15 Window Function (page 237).

43

2-1SectionPT Screens

System Screens

Screens with predetermined functions are called system screens.

The types of system screens are indicated in the table below.

Reference: When changing the screen from the PT status control area display screen, the

only screen 0 can be changed.

Screen

No.

0 No-display screen If screen number 0 is designated as the display screen, the screen of the PT is made

9000 System initializing

9001 Occurrence history

9002 Frequency history

Name Function

blank.

screen

screen

screen

This screen is displayed during the initial processing when the PT starts operation.
During operation, screen number 9000 cannot be designated for display, but it is pos­sible to create and register a screen under screen number 9000 at the Support Tool,
and this screen can then be displayed instead of the default system initialization
screen. Only fixed display elements can be registered for screen number 9000.

The PT features the display history record function, which records the display status
of screens. By designating screen number 9001 as the display screen, you can
check the screens that have been displayed up to the present time in display order.
You can set whether the records are presented in the order of newest first or oldest
first by setting a PT memory switch.

The PT features the display history record function, which records the display status
of screens. By designating screen number 9002 as the display screen, you can
check the screens that have been displayed up to the present time in order of fre­quency of display.

9020 Programming Con-

9021 to
9023

9030 Brightness and

9999 Return to previous

sole function
screen

Device Monitor
function screens
(NT31/NT31C and
NT631/NT631C
only)

Contrast Adjust­ment Screen
(NT31/NT31C and
NT631/NT631C
only)

screen designation

As an expansion function, the PT features the Programming Console function, which
allows equivalent functions to those of a Programming Console. When the PT is con­nected to a host that supports the Programming Console function, it can be used in
the place of a Programming Console by designating screen number 9020 as the dis­play screen.

The PT has been equipped with the Device Monitor function, which can perform the
same functions as a Data Access Console (DAC). When the PT is connected to a
host that supports the Device Monitor function, one of the following screens can be
specified to list the contents of host words, change word PVs, or display error log
information.

9021: Registration monitor screen
9022: Continuous monitor screen
9023: Error log screen

This screen can be used to adjust the contrast and the backlight brightness during
PT operation.

In addition to the display history function, the PT has a function that allows the
screen numbers of up to 32 screens to be recorded in their order of display. When
screen number 9999 is designated as the display screen, the screen that was dis­played immediately before the currently displayed screen is redisplayed. However,
note that if a system screen is displayed in the middle of operation, the record of dis­played screens is cleared. (The display history function’s data is not affected.)

44

For details on the display history function, refer to 2-16-1 Display History Record
Function (page 244).
For details on the Programming Console function, refer to 6-12 Programming
Console Function of the Setup Manual (V062-E1-).

For details on the Device Monitor function, refer to 2-17 Device Monitor Function
(page 259).
For details on screen switching refer to 3-3-1 Switching the Screen (page 299).

2-1-4 Screen Attributes

The PT allows attributes to be set for each screen, so that the function specified
by the attribute is executed when the screen is displayed. For example, when a
screen for which the buzzer attribute has been set is displayed, the buzzer
sounds.

Set the screen attributes as properties of each screen using the Support Tool.

The screen attributes that can be set are listed below. It is possible to set more
than one attribute for the same screen at one time.

• Backlight (Light/Flash)

• Buzzer (None/Continuous/Long/Short)

• Background (NT31C and NT631C only)

• Screen comment

• History (record/don’t record)

• History title

• Load Local1 (Keyboard) (screen number)

• Load Local2 (screen number)

2-1SectionPT Screens

Backlight

The backlight attribute sets whether the backlight is lit or flashed when a screen
is displayed.

Setting Function

Light The backlight is lit. (Default)

Flash The backlight is flashed.

Reference: The PT’s backlight can also be lit or made to flash using the PT status control bit

(page 293).

Buzzer

The buzzer attribute allows the buzzer to sound when a screen is displayed.
There are the following four types of buzzer attribute setting.

Setting Function

None

Continuous

The buzzer does not sound when the screen is displayed. (Default)
If the buzzer is sounding when the screen is displayed, it stops.

The buzzer sounds continuously when the screen is displayed.
If a buzzer type other than continuous is sounding when the screen is
displayed, the sound changes to continuous.

Long

Short

The long intermittent buzzer sounds when the screen is displayed.
If a buzzer type other than long intermittent is sounding when the
screen is displayed, the sound changes to long intermittent.
The long intermittent buzzer sound is the repeated alternation of 1.0
second on and 1.0 second off.

The short intermittent buzzer sounds when the screen is displayed.
If a buzzer type other than short intermittent is sounding when the
screen is displayed, the sound changes to short intermittent.
The short intermittent buzzer sound is the repeated alternation of 0.5
seconds on and 0.5 seconds off.

45

The setting for the Buzzer Sound memory switch at the PT takes priority in deter­mining whether or not the buzzer actually sounds. When this memory switch is
set to ON. the buzzer set with a screen attribute can sound.

Reference:  The buzzer can also sound by PT status control bit operation (page 290).

 The following methods can be used to stop the buzzer when it is sounding.

• Switching to a screen whose buzzer attribute is None

• Stopping the buzzer by PT status control bit operation (page 292)

• Registering the buzzer stop touch switch on the screen (page 293)

Background Color (NT31C and NT631C Only)

With the NT31C and NT631C, the background color of the entire screen can be
set for each screen. The following 8 background colors can be set.

Black, blue, red, magenta, green, cyan, yellow, white

Screen Comment

A comment indicating the contents of the screen can be set as any required
character string of up to 24 characters.

History

When a screen for which this attribute is set is displayed, the screen number,
display time, number of times displayed, and history title of the displayed screen
are recorded as display history data.

2-1SectionPT Screens

Setting Function

Checked

Not
checked

When the screen is displayed, its data is recorded in the display histo­ry.

When the screen is displayed, its data is not recorded in the display
history. (Default)

Reference: The display history can be checked in the Maintenance mode of the PT, and can

also be read during operation by displaying screen number 9001 (occurrence or­der) or screen number 9002 (frequency order). It is also possible to transmit the
display history record data to the personal computer by operation at the Support
Tool. For details, refer to the NT-series Support Tool Version 4. for Windows
Operation Manual (V061-E1-).

History Title

This attribute sets a character string to be recorded in the display history along
with the display time and other information when a screen for which the history
attribute is set is displayed.

The history title can be set as any required character string of up to 24 charac­ters.

This setting is only valid for screens for which the history attribute is set. When a
screen for which the history title attribute is set is displayed by the PT, the desig­nated character string is recorded together with the screen number in the display
history.

Load Local1, Load Local2

Specify whether or not a window (Local1, Local2) pops up at the same time the
screen is displayed by screen switching. Set the window screen number to be
displayed when you check these attribute.

For details of a window, refer to 2-15 Window Function (page 237), and for de­tails of using method of a window, refer to 3-4 Display and Control of Windows
(page 307)

46

2-1SectionPT Screens

Reference:  A window can also be opened, closed or moved by the operation at Window

control area. (Refer to page 310.)

 To control (open close or move) a window, follow the methods below.

• Register an Input key-Window/Keyboard touch switch or a Window Move

touch switch on a screen. (Refer to pages 308, 309.)

• Register a Cursor Move touch switch that has a window open function.

(Refer to page 308.)

• Operate Window control area from the host. (Refer to page 310.)

• Switch to the screen that has a Load Local1 (keyboard) or Load Local2

screen attribute. (Refer to page 311.)

Restrictions Relating to
Screen Attributes

2-1-5 Display Colors

Available Colors

The functions of the backlight and buzzer attributes can also be performed using
the PT status control bits. (And the buzzer can also be operated with a touch
switch.) When a screen for which one of these attributes is set is displayed, the
set function is executed regardless of the status of the PT status control bits, but
the status of the backlight or buzzer can be changed later by using another op­eration.

Depending on the screen attribute settings and the PT status control bit sta­tuses, the PT status control bit statuses may not match the actual operation (ex.
the buzzer bit in the PT status control bits may indicate that the buzzer is stopped
although the buzzer is actually sounding). In such a case, carry out PT status
control bit operations to make the statuses agree with the actual status of the PT.

For details on the PT status control bits, refer to 2-2-1 PT Status Control Area
(page 52).

When a screen is created with the Support Tool, the color of each element dis­played on the PT screen can be set in the element’s attributes.

The monochrome PTs (NT21, NT31, and NT631) can display elements in black
or white. (The NT631 has an EL display so lit elements will actually appear
orange, but the color is still referred to as white.)

The color PTs (NT31C and NT631C) can display the following eight colors.

Black, blue, red, magenta, green, cyan, yellow, white

When an element’s color is the same as the background color (making it invis­ible), the PT changes the color of the element to its opposite color to make it vis­ible. The opposite color combinations (XOR relationships) are as follows:

Black ⇔ White, Blue ⇔ Yellow, Red ⇔ Cyan, Magenta ⇔ Green

The following kinds of display elements are displayed in the above combinations
of colors.

• Frame of input fields for numeral/character string input, and screen back-

ground color (page 192, 210).

• Display color of eight dots beyond the top of a bar graph, and screen back-

ground color (page 157).

Reference: XOR is the abbreviation of eXclusive OR. Color combinations that are opposites

in terms of the three primary colors — red, green, and blue — are said to be in an
XOR relationship.

Example: Blue (red 0, blue 1, green 0) ⇔ Yellow (red 1, blue 0, green 1)

47

2-1SectionPT Screens

Color Correspondence Between Color and Monochrome PTs

The only colors that a monochrome PT can display are white and black.
The screen data for a color PT can be displayed on a monochrome PT without

alteration and in this case the color correspondences are as follows:

Reference: When screen data is created for an NT21 or NT31, black and white are displayed

Transparent Display

Color on a color PT Color on an NT 21 or

NT31

Black, blue, red, or magenta White Black

Green, cyan, yellow, or white Black White (EL lit color)

Color on an NT631

Likewise, the screen data for a monochrome PT can be displayed on a color PT
without alteration and in this case the color correspondences are as follows:

Color on an NT 21 or

NT31

White Black Black

Black White (EL lit color) White

Color on an NT631 Color on a color PT

as white and black respectively at the Support Tool.

When elements are displayed on top of others, normally the background color of
the element on top conceals the element below so that it cannot be seen.

Besides the above eight colors, the color transparent is available for the back­ground of some display elements.

When transparent is set, nothing appears behind a display element, and the dis­play element or screen background color underneath it is visible.

<Normal display> <Transparent display>

Graphic under character

Graphic under character

A A

Background
color

Character

Background color
(transparent)

Character

Possible Applications of the Transparent Color Designation

• Background color of normal display text

• Background of labels for lamps and touch switches (fixed as transparent)

• Display color of lamps and touch switches when they are off

• Background color of tiling patterns for graphics

• Background color of marks

Impossible Applications of the Color Transparent Designation

• Background of character strings displayed from the character string memory

table

• Background of numeric values displayed from the numeral memory table

• Background of numeric values and character strings in numeral setting input

fields and character string input fields

• Background of characters indicating percentages (%) on graphs

• Display color of lamps and touch switches when lit

• Background color of temporary input fields

• Display color of alarm list/history

48

2-1SectionPT Screens

Screen Background
Color

Text Display Color

Graphics Display Color

The background color of the entire screen can be designated with the Back­ground screen attribute. Screen attributes are properties set for each screen
with the Support Tool.

The color of characters (character color) and that of their rectangular frames
(background color) can be specified.

A

Background color

Character color

The colors of lines and tiling patterns can be specified for graphics.

The colors that can be designated for tiling patterns are the color of the pattern
itself, the background color of the pattern, and the color of the outline of the tiled
area.

Outline color (Border)

Pattern display

Tiling

color (Foreground)

Pattern background
color (Background)

Line color

Reference: When a lamp, a touch switch, and a graphic are displayed in color, part of the

frames of the display elements may be invisible because of the combination of
the background, outline, and tiling colors. This is a phenomenon peculiar to a col­or LCD, not a failure of the system. In such a case, change the color combination.

2-1-6 Display Elements

The PT can display the following elements.

Text

Graphic

Character strings

95/04/10 14:10
LINE B PRODUCTION
STATUS

TARGET

OUTPUT

PRODUCT

C

PRODUCT

D

Mark

EMERGENCY
STOP

Image data

Touch switch

Lamp

Numeric keys

Numeral display Numeral

input

Graph

49

2-1SectionPT Screens

Fixed
display

Element Description

Arcs Possible display modes: standard/flash/inverse/inverse flash. Other

display modes are not available.

Circles Possible display modes: standard/flash/inverse/inverse flash. Other

display modes are not available.

Rectangles Possible display modes: standard/flash/inverse/inverse flash. Other

display modes are not available.

Polygons Possible display modes: standard/flash/inverse/inverse flash. Other

display modes are not available.

Polylines Possible display modes: standard/flash. Other display modes are not

available.

Sectors Possible display modes: standard/flash/inverse/inverse flash. Other

display modes are not available.

Text Character strings. Possible display modes: standard/flash/inverse

flash. Other display modes are not available.

Tiling The inside of an enclosed area is filled with a tiling pattern. Page 101

Image data Graphics of any required size, composed of dots. The display mode

cannot be changed.

Library data These are groups of elements used as a single element. Fixed display

graphics can be registered as library data.

Marks These are graphics composed of 16 by 16 dots that are treated as

characters.

For Details,

Refer to

Page 90

Page 90

Page 90

Page 90

Page 90

Page 90

Page 98

Page 106

Page 109

Page 103

Lamps

Touch switches These are elements that can be used as switches: they allow the

Numeral display The contents of a numeral memory table entry in the internal memory

Character string display The contents of a character string memory table entry in the internal

Graphs

Normal (Standard)
lamps

Image/library lamps These are elements that display different image/library data depend-

Bar graphs The data contents of a numeral memory table entry in the internal

Analogue meter The data contents of a numeral memory table entry in the internal

These are graphics that light (flash) and go off depending on the sta­tus of a bit at the host. The following shapes can be selected for nor­mal (standard) lamps: rectangles, polygons, circles, fans.

ing on the status of a bit at the host.

execution of various functions, such as notification to the host, to be
executed by pressing the touch panel of the PT. They also have the
same display functions as normal (standard) lamps. They can be dis­played in any of the following forms: standard, shadow, 3-dimension,
rectangle, circle, polygon, sector — (standard without frame can be
displayed also.).

of the PT is displayed. The display changes in accordance with chan­ges in the data contents.

memory of the PT is displayed. The display changes in accordance
with changes in the data contents.

memory of the PT is displayed in bar graph form.

memory of the PT is displayed in the form of a quarter, semi-circle or
circle-shaped graph.

Page 112

Page 112

Page 119

Page 140

Page 148

Page 154

Page 158

50

Broken line graphs The data contents of multiple numeral memory table entries in the

internal memory of the PT are displayed in the form of a broken line
graph.

Trend graphs The data contents of multiple numeral memory table entries in the

internal memory of the PT are displayed in the form of a trend graph.

Page 164

Page 170

2-1SectionPT Screens

Element

Alarms

Input
Settings

Recipe Tabular elements that can be used to write several words of numeric

Alarm list This element monitors the status of host bits designated in advance,

Alarm history  Occurrence order

Numeral input This is an element for inputting numeric values to a numeral memory

Character string
input

Thumbwheel
switch

and displays the message corresponding to the bit that comes ON. By
pressing the displayed message, the corresponding image/library data
can be displayed and the screen can be switched.

This element monitors the status of host bits designated in advance,
and displays the contents of the alarm history record (occurrence
order), which records the time when the bits come ON, together with
the messages corresponding to each bit. As with the alarm list, it is
possible to display the messages or image/library data correspond­ing to each bit.

 Frequency order

This element monitors the status of host bits designated in advance,
and displays the contents of the alarm history record (frequency
order), which records the number of times each bit has come ON,
together with the messages corresponding to each bit. As with
alarm list, it is possible to display the messages or image library
data corresponding to each bit.

table entry by using touch switches as numeric keys.

This is an element for inputting character strings to a character string
memory table entry by using touch switches as input key – string.

This is an element for inputting numeric values to a numeral memory
table entry by using + and – touch switches for each digit.

value data set at the PT, or can be used to read several words of data
from the host. It also allows numerical value data to be edited from the
touch panel.

Description

For Details,

Refer to

Page 182

Page 182

Page 192

Page 210

Page 200

Page 216

51

2-2 Areas for Control/Notification

The following areas are provided for PT control and PT status notification be­tween the PT and the host.

• PT status control area

This area is used to designate the screen to be displayed at the PT, to copy
data contents between memory table entries in the PT, and to control the status
of the backlight and other statuses.

• PT status notify area

This area is used to notify the memory table entry number to the host when
there is a change in the data contents of a memory table entry in the PT, and to
notify information such as changes in the PT status.

• Window control area

This area is used to designate the window screen number or display position
from the host, and to notify these information from PT.

• Clock data area (NT21)

This area is used to read clock data from the host for use by the PT. The NT21
does not have a built-in clock, so data is periodically read to this area.

Reference:  Words must be allocated in the host for the PT status control area and PT sta-

tus notify area. Screen data cannot be downloaded from the Support Tool un­less they have been allocated.

2-2SectionAreas for Control/Notification

 The PT status control area, PT status notify area, window control area, and

clock data area (NT21 only) must be set so that they do not overlap.

 When multiple PTs are connected to one PC, the PT status control area, PT

status notify area and window control area of each PT must be set so that they
do not overlap, or the movement of PT will be unstable.

 Allocate words for a window control area in the host only when the window is

used and when the window is controlled from the host. Even if words are not
allocated for the window control area in the host, a window can be controlled by
touch switch operation.

 Words must be allocated in the host for the clock data area only when clock

data is required on the NT21 (e.g., to display the time or date or to use the
screen display or alarm history). Allocation is not required if clock data is not
being used on the NT21.

2-2-1 PT Status Control Area (Host ↔ PT)

When data is written to this area from the host, the PT reads the data and oper­ates accordingly. However, note that the number of the currently displayed
screen is written to the screen switch setting word from the PT too.

The PT status control area is configured as five consecutive words as shown
below. The first word (word n) is set in the Control/Notify Area settings in the PT
configuration settings made with the Support Tool.

15

Word

n

n + 1

n + 2

n + 3

14131211109876543210

Screen No. (4-digit BCD or hexadecimal) Screen switch setting

Copy source memory table entry

number (4-digit BCD or hexadecimal)

Copy destination memory table entry

number (4-digit BCD or hexadecimal)

PT status control bits PT status control

Bit

Copy memory table
setting

52

n + 4

Reserved for system use

2-2SectionAreas for Control/Notification

Reference: The configuration and functions of the PT status control area are different when

the PT is set to NT20S or NT30/620 compatible mode. Refer to Appendix C for
details on the NT20S and NT30/620 compatible modes.

Words Allocated for the
PT Status Control Area

Symbol C-series PCs Allocation CV-series PCs Allocation CS/CJ-series PCs Allocation

None IR Area OK CIO Area OK CIO Area OK

H HR Area OK --- --- HR Area

A AR Area OK Auxiliary Area No AR Area OK

L LR Area OK --- --- LR Area

T

TU --- --- --- ---

C

CU --- --- --- ---

W --- --- --- --- WR Area

TK --- --- --- --- Task Flags No

TC Area,
Timer PVs

TC Area,
Counter PVs

Words can be allocated for the PT status control area (host ↔ PT) in the follow-
ing host (PC) areas.

Not for

Host Link

Not for

Host Link

No

No

No

No

Not for

Host Link

No

No

Timer Area,
Timer PVs

Counter Area,
Counter PVs

No

No

*1

TC Area,
Timer PVs

TC area,
Timer Completion Flags

TC Area,
Counter PVs

TC Area,
Counter Completion Flags

D DM Area OK DM Area OK DM Area OK

E

E0_ to
EC_

EM Area *2,
current bank

--- --- --- ---

OK

*1: LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.

*2: The EM Area is supported only by the C200HX/HG/HE(-Z)E PCs.

EM Area,
current bank

Not for

Host Link

EM Area,
current bank

EM Area,
EM banks 0 to C

Not for

Host Link

Not for

Host Link

The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func­tions, and cannot be used for purposes other than system use.

The range of each memory area differs according to the PC. Refer to Appendix D
PC Memory Maps on page 435.

Functions of the PT Status Control Area

Screen Switch Setting

Data is written to the screen switch setting word from both the PT and the host.
The meaning of the data differs according to whether it is written from the PT or
the host. However, if the PT is currently operating, the number of the screen dis­played is always written to the screen switch setting word.

Reference: When the PT is set to NT20S or NT30/620 compatible mode, data can be written

from the host only. In this case, the screen switch setting notification from the PT
occurs in the first word (word m) of the PT status notify area. Refer to Appendix C
for details on the NT20S and NT30/620 compatible modes.

When Data Is Written from the Host

To switch the screen displayed at the PT by an instruction from the host, write the
screen number, as a 4-digit BCD or hexadecimal value, to the screen switch set­ting word. Whether the value is expressed in BCD or hexadecimal is determined

53

2-2SectionAreas for Control/Notification

by the setting for numeral storage type in the PT configuration settings made
with the Support Tool.

Designated screen

PCPT

PT status control area

Screen switch setting

Copy memory

table setting

PT status control setting

Reserved for system use

← Screen number

Screen Switch Setting in the PT Status Control Area

1514131211109876543210

Word

n

Screen number (4-digit BCD or hexadecimal)

Bit

Screen switch setting

The screen numbers that can be set are as follows:

BCD Hexadecimal Screen

0000 0000 No-display (screen cleared)

0001 to
3999

0001 to 0F9F Screen numbers 1 to 3,999

Note These functions are not supported by the NT21.

Reference:  The screen can also be switched by bit memory table operation (page 299), by

touch switch operation (page 300), or by using the alarm list/history function
(page 302).

 To display overlapping screens, designate the screen number of the parent

screen.

 If there are no elements registered for the designated screen number, or if a

keyboard screen is designated, the screen does not switch.

 When the PT starts operating, the screen is displayed according to the con-

tents of the screen switch setting word. If the contents of the screen switch set­ting word are invalid, the screen is displayed according to the Initial Screen in
the PT configuration settings made at the Support Tool. If the setting for Initial
Screen is also invalid, an error message is displayed.

 The PT will continue operating when the Programming Console function or De-

vice Monitor function is called with a command from the host, but even though
the Programming Console or Device Monitor screen is displayed, it will be
skipped if you attempt to go back to it with a return to previous screen touch
switch.

54

2-2SectionAreas for Control/Notification

When Data Is Written from the PT

When the screen display has been switched by operation at the PT, the new
screen number is written as a 4-digit BCD or hexadecimal value into the screen
switch setting word by the PT. At the same time, the ON status is also notified to
the screen switch strobe flag of the PT status word of the PT status notify area by
the PT (after notification, the OFF status is re-established) (page 304). Whether
the data is written in BCD or hexadecimal format is determined by the setting for
numeral storage type in the PT configuration settings made at the Support Tool.

Currently
displayed screen

PCPT

PT status control area

Screen switch setting

Copy memory

table setting

PT status control setting

Reserved for system use

PT status notify area

Content update memory table

PT status

← Screen number

← Screen switch strobe

flag

Screen Switch Setting Word of the PT Status Control Area and PT Status
Word of the PT Status Notify Area

PT status control area

1514131211109876543210

Word

n

Screen number (4-digit BCD or hexadecimal)

Bit

Screen switch setting

PT status notify area

151413 12 11 10 9 8 7 6 5 4 3 2 1 0

Word
m + 1

000–––000––––– –

Bit

PT status

Screen switch strobe flag

The screen numbers notified are as follows:

BCD Hexadecimal Screen

0000 0000 No-display (screen cleared)

0001 to
3999

0001 to 0F9F Screen numbers 1 to 3,999

9001 2329 Occurrence history screen

9002 232A Frequency history screen

9021 233D

9022 233E

Device Monitor function: Registration monitor screen
(See note.)

Device Monitor function: Continuous monitor screen
(See note.)

9023 233F Device Monitor function: Error log screen (See note.)

9030 2346 Brightness and contrast adjustment screen (See note.)

Note These functions are not supported by the NT21.

55

2-2SectionAreas for Control/Notification

Reference:  The screen number is notified only when the screen is switched by operation

at the PT.

 When overlapping screens are displayed, the screen number of the parent

screen is notified.

 When the PT is set to NT20S or NT30/620 compatible mode, the screen switch

setting notification from the PT occurs in the first word (word m) of the PT status
notify area. Refer to Appendix C for details on the NT20S and NT30/620 com­patible modes.

Copy Source/Copy Destination Memory Table Entry Numbers

Designate the memory table entry numbers of the copy source and copy des­tination memory table entries as 4-digit BCD or hexadecimal values, when copy­ing data between memory table entries in the PT. Whether the values are BCD or
hexadecimal is determined by the setting for numeral storage type in the PT con­figuration settings made with the Support Tool.

The memory table entry numbers that can be designated are indicated in the
table below.

BCD Hexadecimal Numbers

0001 to 1999 0000 to 07CF Memory table entry numbers 0 to 1,999

Note that it is only possible to copy between the following combinations.

• A numeral memory table entry and a numeral memory table entry

• A character string memory table entry and a character string memory table

entry

Reference:  What is designated here is the memory table entry number only. The type of

memory table (numeral/character string) is set by the memory table copy type
bit in the PT status control bits.

 Copying is not executed just be writing the memory table entry numbers. It is

executed when the memory table entry copy execution bit in the PT status con­trol bits is turned ON.

 Since the memory table entry numbers start from 0, if there are 2000 memory

table entries, the range is 0 to 1999, and if there are 1000, the range is 0 to 999.

 When the PT is set to NT20S or NT30/620 compatible mode, copying between

memory table entries is performed differently. Refer to Appendix C for details
on the NT20S and NT30/620 compatible modes.

56

Pt Status Control Bits

The PT status control bits have the functions indicated below.

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit

n+3ch

0

0

15

Screen display

14

Processing priority registration (for NT link (1:N))

13

Continuous buzzer

12

Intermittent buzzer (short)

11

Display history initialization

10

Not used

9

Intermittent buzzer (long)

8

Backlight mode

7

Screen printing

6

PT window opening

5

Numeral/character string input

4

PT screen switching

3

Memory table copy execution

Memory table copy type

2

Alarm history initialization

1

Not used

0

Controlled Item

1 (ON)

Performed

Registered

Sounded

Sounded

Performed

Sounded

Lit

Performed

Disabled

Disabled

Disabled

Performed

Numeral

Performed

2-2SectionAreas for Control/Notification

0 (OFF)

Not performed

Canceled

Stopped

Stopped

Not performed

Always 0

Stopped

Flashing

Not performed

Enabled

Enabled

Enabled

Not performed

Character string

Not performed

Always 0

The backlight mode bit (bit 8) is not supported by the NT631.
The screen printing bit (bit 7) is not supported by the NT21.

Reference:  Since the statuses of the PT status control bits do not change even if the status

of the PT changes in accordance with the settings of attributes or memory
switches, the statuses of the PT status control bits may sometimes disagree
with the status of the PT. For example, the buzzer may be sounding even
though the continuous buzzer bit is OFF. In such a case, perform PT status
control bit operations to achieve agreement with the status of the PT.

 The PT status control bits are checked in bit units by the PT. The only functions

that are actually performed are those for which the corresponding bits have
changed in status.

 The configuration of the PT status control bits is different when the PT is set to

NT20S or NT30/620 compatible mode. Refer to Appendix C for details on the
NT20S and NT30/620 compatible modes.

Screen Display (Bit 15)

The screen display bit displays and clears screens. It is used to prevent the
formation of an afterimage on the display panel, etc. When bit 15 is turned OFF,
the screen is cleared and the backlight also goes off. However, if the screen sav­er function is set with the memory switches of the PT, the screen saver is acti­vated (the operation depends on the setting made for the screen saver function).

If bit 15 is turned ON (1), or the touch panel is pressed, while the screen is
cleared (or while the screen saver function is working), the screen that was dis­played immediately before the screen was cleared is redisplayed. The backlight
also comes back on (or flashes).

Reference: Even when bit 15 is OFF, the designated screen will be displayed if screen

switching is designated from the host, or the status of bit 8 (backlight mode)
changes, or the touch panel of the PT is pressed.

57

Processing Priority Registration (For NT Link 1:N) (Bit 14)

IR 284 (port A)
A393 (RS-232C

t)

CIO 1919 (port 2)

CIO n+19 (port 2)

3

CQM1H

(p )

AR 09

One of the PTs connected by the NT link (1:N) method can be registered for
priority processing. The PT for which bit 14 is set to ON (1) is given priority over
the other PTs, and has more rapid response time for screen display, touch switch
operations, etc.

When bit 14 is set to OFF (0), this registration is canceled and the response
speed is returned to normal. If priority registration is set for more than one PT, the
one set last is given priority.

The unit number of the PT given priority registration can be checked by monitor­ing (reading) a word at the CS1G/H/D, CJ1G/H/M, C200HX/HG/HE(-Z)E,
CQM1H, and SRM1 PC. For details on the word monitoring operation at a PC,
refer to the manual for the PC you are using.

The contents of the words that reflect the status of an NT link (1:N) system are
indicated below.

Word Bit Function

2-2SectionAreas for Control/Notification

C200HX/HG/HE(-Z)E

IR 265 (standard port)
IR 284 (port A)
IR 285 (port B)

CS1G/H/D or CJ1G/H/M

A394 (peripheral port)
CIO 1909 (port 1)
CIO 1919 (port 2)
CIO n+9 (port 1)

IR 202 (port 1)
IR 203 (port 2)

SRM1

*1
*1

*2
*

*2

por

*

*2
*2

*3

*3

0 Peripheral Port PT Communications Flag for unit 0: ON when connected

1 Peripheral Port PT Communications Flag for unit 1: ON when connected

2 Peripheral Port PT Communications Flag for unit 2: ON when connected

3 Peripheral Port PT Communications Flag for unit 3: ON when connected

4 Peripheral Port PT Communications Flag for unit 4: ON when connected

5 Peripheral Port PT Communications Flag for unit 5: ON when connected

6 Peripheral Port PT Communications Flag for unit 6: ON when connected

7 Peripheral Port PT Communications Flag for unit 7: ON when connected

8 Peripheral Port PT Priority Registered Flag for unit 0: ON when given priority

9 Peripheral Port PT Priority Registered Flag for unit 1: ON when given priority

10 Peripheral Port PT Priority Registered Flag for unit 2: ON when given priority

11 Peripheral Port PT Priority Registered Flag for unit 3: ON when given priority

12 Peripheral Port PT Priority Registered Flag for unit 4: ON when given priority

13 Peripheral Port PT Priority Registered Flag for unit 5: ON when given priority

14 Peripheral Port PT Priority Registered Flag for unit 6: ON when given priority

15 Peripheral Port PT Priority Registered Flag for unit 7: ON when given priority

*1: Communications Board ports

*2: Ports on the Serial Communications Board (CS Series only)

*3: Ports on the Serial Communications Unit (n=150025 the Unit’s unit number)

Continuous Buzzer (Bit 13), Short Intermittent Buzzer (Bit 12), Long Inter­mittent Buzzer (Bit 9)

The continuous buzzer continues buzzing with no interruptions.
The short intermittent buzzer repeatedly alternates between sounding for 0.5

seconds and stopping for 0.5 seconds.
The long intermittent buzzer repeatedly alternates between sounding for 1.0 se-

conds and stopping for 1.0 seconds.
If more than one of these bits is ON at the same time, the buzzer sounds in accor-

dance with the following order of priority.

1. Continuous buzzer

2. Short intermittent buzzer

3. Long intermittent buzzer

58

2-2SectionAreas for Control/Notification

When stopping the buzzer by PT status control bit operation, set all three of the
bits above to 0 (OFF).

Reference:  The buzzer will actually sound only when the Buzzer Sound memory switch of

the PT is set to ON.

 The buzzer can also be stopped in other ways: by using a touch switch to which

the buzzer stop attribute has been assigned (page 300), or by setting the
screen attribute that stops the buzzer sound (page 45).

 The buzzer can also be controlled by using the Buzzer screen attributes (page

45).

 Even if the buzzer is controlled using PT status control bit operation, changes

in the displayed screen may cause the status of the buzzer to changed depend­ing on the buzzer setting in the screen attributes. Reset the PT status control
bits if necessary.

Display History Initialization (Bit 11)

This bit is used to initialize the display history recorded in the PT.

When it is switched from 0 (OFF) to 1 (ON), the display history in the PT is initial­ized.

After initialization, return its status to 0.

Reference: The display history can also be initialized from the MEMORY INIT. MENU screen

under the System Menu of the PT.

Backlight Mode (Bit 8)

The backlight mode is used for controlling the backlight of the PT. This bit is inval­id in the NT631.

The status of bit 8 has the following effects.

• 1 (ON): lit

• 0 (OFF): flashing

Screen Printing (Bit 7) (Not Supported by the NT21)

Hard copies of the screen can be made when a printer is connected to the PT.

When bit 7 is set from 0 (OFF) to 1 (ON), printing of the currently displayed
screen starts. Note that it is not possible to stop printing while printing is in prog­ress.

Check that bit 7 (printer operating status) of the PT status notify area is in the 0
(OFF) status before starting printing.

When printing starts and bit 7 has been set to the 1 (ON) status, return the screen
printing bit to 0 (OFF).

Reference:  It is also possible to print screens by using a touch switch assigned the Print

screen function.

 The printer type (control protocol) and printing method, are set with the

memory switches of the PT.

PT Window Opening Bit (Bit 6)

The PT window opening bit is used to disable opening of a window by operation
at the PT.

The status of bit 6 has the following effects.

59

Bit 6 Function

0 (OFF) Windows can be opened by operation at the PT.

2-2SectionAreas for Control/Notification

1 (ON) Windows cannot be opened by operation at the PT (windows that are

already open can be closed by operation at the PT).
Also, when a keyboard screen attribute is designated for a screen, the
window will not open when the screen is switched by operation at the PT.

Reference: If the interlock function has been set for a touch switch, window operations from

the touch switch can also be disabled by turning OFF the corresponding interlock
bit in the PC.

Numeral/Character String Input (Bit 5)

This bit is used to disable the input of numeric values and character strings into
numeral setting/character string input fields by operation at the PT. It also con­trols input from thumbwheel switches, recipe objects, and bar code readers.

The status of bit 5 has the following effects.

Bit 5 Function

0 (OFF) Input into numeral setting input fields and character string input fields is

1 (ON) Input into numeral setting input fields and character string input fields is

possible.

disabled (it is also not possible to change the contents of numeral/charac­ter string memory table entries by operation at the PT, such as copying
memory table entries with touch switches).
The contents of numeral/character string memory table entries can be
changed without restriction from the host. It is also possible to copy
memory table entries using the PT status control area.

Operation

Reference: If the interlock function has been set for a numeral input, character string input,

thumbwheel switch, or recipe object, the input can also be disabled by turning
OFF the corresponding interlock bit in the PC.

PT Screen Switching (Bit 4)

This bit is used to disable screen switching by operation at the PT.
The status of bit 4 has the following effects.

Bit 4 Function

0 (OFF) Screen switching by operation at the PT is possible.

1 (ON) Screen switching by operation at the PT is not possible.

The screen can be switched by the instructions from the host (screen
switch setting word of the PT status control area, bit memory table opera­tions).

Reference: If the interlock function has been set for a touch switch, screen switching by the

touch switch can also be disabled by turning OFF the corresponding interlock bit
in the PC.

Memory Table Copy Execute (Bit 3), Memory Table Copy Type (Bit 2)

The memory table copy execute and memory table copy type bits are used to
copy data between memory table entries in the PT by PT status control area op­erations.

Proceed as follows to copy between memory table entries using the PT status
control area:

1, 2, 3... 1. Set the numbers of the copy source and copy destination memory table en-

tries for copy source memory table entry number (word n + 1) and copy des-

60

2-2SectionAreas for Control/Notification

tination memory table entry number (word n + 2) of the PT status control
area.

2. Set the type of the memory table to be copied for memory table copy type (bit

2) of the PT status control bits (word n + 3) as follows:

• 1 (ON): When copying between numeral memory table entries

• 0 (OFF): When copying between character string memory table entries

3. Set 1 (ON) for memory table copy execution (bit 3) of the PT status control
bits (word n + 3).

Memory table entry data is copied.

4. After copying has been executed, return memory table copy execution (bit

3) to 0.

Reference:  If the display method or number of registered words is different for the copy

source and copy destination memory table entries, the data may not be dis­played correctly.

 If the contents of memory table entries are changed by PT status control area

operation, the change in memory table contents is not notified by the PT status
notify area.

 Memory table entries are copied differently when the PT is set to NT20S or

NT30/620 compatible mode. Refer to Appendix C for details on the NT20S and
NT30/620 compatible modes.

Alarm History Initialization (Bit 1)

This bit is used to initialize the alarm history recorded in the PT.
When it is switched from 0 (OFF) to 1 (ON), the alarm history in the PT is initial-

ized.
After initialization, return its status to 0.

Reference: The alarm history can also be initialized from the MEMORY INIT. MENU screen

under the System Menu of the PT.

2-2-2 PT Status Notify Area (PT to Host)

The PT status notify area is provided to notify the host of changes in the status of
the PT. The host can determine the status of the PT by reading this area.

The PT status notify area is configured as two consecutive words as shown be­low. The first word (word m) is set in the Control/Notify Area settings in the PT
configuration settings made with the Support Tool.

Word

m

m + 1

Reference: The configuration and functions of the PT status notify area are different when

the PT is set to NT20S or NT30/620 compatible mode. (There are 3 words, with
the first word indicating the screen currently being displayed.) Refer to Appendix
C for details on the NT20S and NT30/620 compatible modes.

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Numeral/character string memory table number

(4-digit BCD or hexadecimal value)

PT status notify bits

Bit

Content update
memory table

000

PT status

Words Allocated of the
PT Status Notify Area

Symbol C-series PCs Allocation CV-series PCs Allocation CS/CJ-series PCs Allocation

None IR Area OK CIO Area OK CIO Area OK

H HR Area OK --- --- HR Area

Words can be allocated for the PT status notify area (PT → host) in the following
host (PC) areas.

Not for

Host Link

61

Symbol AllocationCS/CJ-series PCsAllocationCV-series PCsAllocationC-series PCs

A AR Area OK Auxiliary Area No AR Area OK

2-2SectionAreas for Control/Notification

L LR Area OK --- --- LR Area

T

TU --- --- --- ---

C

CU --- --- --- ---

W --- --- --- --- WR Area

TK --- --- --- --- Task Flags No

D DM Area OK DM Area OK DM Area OK

E

E0_ to
EC_

TC Area,
Timer PVs

TC Area,
Counter PVs

EM Area *2,
current bank

--- --- --- ---

No

No

OK

Timer Area,
Timer PVs

Counter Area,
Counter PVs

EM Area,
current bank

No

No

Not for

Host Link

TC Area,
Timer PVs

TC Area,
Timer Completion Flags

TC Area,
Counter PVs

TC Area,
Counter Completion Flags

EM Area,
current bank

EM Area,
EM banks 0 to C

*1

Not for

Host Link

No

No

No

No

Not for

Host Link

Not for

Host Link

Not for

Host Link

*1: LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.

*2: The EM Area is supported only by the C200HX/HG/HE (-Z)E PCs.

The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func­tions, and it cannot be used for purposes other than system use.

The range of each memory area differs according to the PC. Refer to Appendix D
PC Memory Maps on page 435.

Functions of the PT Status Notify Area

Reference: When the PT is set to NT20S or NT30/620 compatible mode, there are 3 words in

the PC status notify area instead of 2 words. The added first word indicates which
screen is currently being displayed at the PT and the original two words are
shifted down. Refer to Appendix C for details on the NT20S and NT30/620 com­patible modes.

Updated Memory Table Entry Number

When the contents of a numeral/character string memory table entry has been
changed by operation at the PT, the number of the memory table entry subject to
the change is written to the content update memory table entry number word as
a 4-digit BCD or hexadecimal value. Whether the value is expressed in BCD or
hexadecimal is determined by the setting for numeral storage type in the PT con­figuration settings made with the Support Tool. The classification of memory
table entry can be determined by whether the numeral setting strobe flag or

62

2-2SectionAreas for Control/Notification

character string setting strobe flag is turned ON. (After turning ON, the flag will
automatically turn OFF.) (Refer to page 63.)

12345678

Numeral memory table entry 1

12345678

7

8

9

4

5

6

1

2

3

0

.

Table entry number
Numeral setting

strobe flag

Allocated words (numeral memory table entry 1)

12345678 →

PCPT

PT status notify area

Content update memory table

PT status

5
1

62738

4

First
First + 1

Updated Memory Table Entry and PT Status of the PT Status Notify Area

151413 12 11 10 9 8 7 6 5 4 3 2 1 0

Word

m

m + 1

Memory table entry number (4-digit BCD or hexadecimal)

–

–––

String setting strobe flag
Numeral setting strobe flag

BCD Hexadecimal Numbers

0001 to 1999 0000 to 07CF Memory table entry numbers 0 to 1,999 max.

Bit

Updated memory
table entry

000000–––– PT status

Reference: The updated memory table entry number is written only when the memory table

contents are changed by operation at the PT. The memory table entry number is
not written when the contents of the numeral memory table entry are changed
with the mathematical function.

PT Status Notify Bits

The PT status notify bits have the functions shown below.

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit

0000

0

0

The printer operating status (bit 7) is not supported by the NT21.

PT Operation Status (Bit 15)

When the PT is in RUN mode, this bit is set to 1. In other modes, and when the
System Menu screen is displayed, it is set to 0 (OFF). When this bit is set to 0
(OFF), the allocated bits and words are neither read or written.

While the PT is in RUN mode, 1 (ON) is periodically written to this bit. In order to
check whether the PT is operating normally or not, write 0 (OFF) to this bit, then

Notified Information

PT operation status

15

Battery status

13

Screen switch strobe

12

Numeral setting strobe flag

11

Character string setting strobe flag

10

Printer operating status

7

Backlight status

6

Global window status

5

Local window1 status

4

Local window2 status

3

1 (ON)

Run

Low

Printing

Off

Open

Open

Open

0 (OFF)

Stop

Normal

Stopped

Lit/Flashing

Close

Close

Close

63

2-2SectionAreas for Control/Notification

read it 30 seconds later. If the setting for the bit is 1 (ON), the PT is judged to be
running, and if it is 0 (OFF), the PT is judged to be stopped.

Note To ensure system safety, be sure to periodically read the PT operating status bit

from the host in order to ensure that the PT is always operating normally.

Battery Status (Bit 13)

This bit is set to 1 (ON) when the voltage of the battery that backs up the internal
memory of the PT (built-in battery) is low. (An optional Battery is required for the
NT21.)

If the battery voltage drops, it is impossible to retain data with the resume func­tion and to retain history records, therefore the battery must be replaced with a
new one within one week after the battery bit is set to 1 (ON). For details on how
to replace the battery, refer to section 7 of the Setup Manual.

Screen Switching Strobe (Bit 12)

This bit is set to 1 (ON) when the PT screen is changed by an instruction from the
host or by operation at the PT (ex. use of screen changeover function). After noti­fication to the host, it is automatically returned to 0 (OFF).

Numeral Setting Strobe Flag (Bit 11)

This bit is set to 1 (ON) when a numeric value is input to a numeral memory table
entry using the numeral input function of the PT. After notification to the host, it is
automatically returned to 0 (OFF).

At the same time, the number of the numeral memory table entry to which the
input was made is notified to the content update memory table word.

Character String Setting Strobe Flag (Bit 10)

This bit is set to 1 (ON) when a character string is input to a character string
memory table entry using the character string input function of the PT. After noti­fication to the host, it is automatically returned to 0 (OFF).

At the same time, the number of the character string memory table entry to which
the input was made is notified to the content update memory table word.

Printer Operating Status (Bit 7) (Not Supported by the NT21.)

This bit is set to 1 (ON) when a printer connected to the PT is printing due to touch
switch operation at the PT or an instruction from the host. On completion of print­ing, it returns to 0 (OFF). It is also returned to 0 (OFF) even while printing is in
progress if the PT displays the System Menu or an error screen. (This bit will
always be OFF for the NT21.)

The PT can print the following data in the RUN mode.

• The currently displayed screen image (by touch switch operation, or operation

of the screen printing bit of the PT status control bits)

• Display history record data (by pressing the Print Screen touch switch when

screen number 9001 or 9002 is displayed)

• Device Monitor display screens (by pressing the print touch switch when

screen number 9021, 9022, or 9023 is displayed)

Backlight Status (Bit 6)

Indicates the status of the EL screen of an NT631 or the backlight of an NT21,
NT31/NT31C, or NT631C as follows:

• 1 (ON): EL screen off or backlight off

• 0 (OFF): EL screen displaying or backlight lit (flashing)

However, this bit is returned to 0 (OFF) when the PT displays the System Menu
or an error screen.

64

Reference: Whether the backlight is lit continuously or flashes when the backlight status bit is

set to 0 (OFF) is determined by the backlight mode bit (bit 8) of the PT status con­trol bits and the Backlight screen attribute.

Global Window Open Status (Bit 5), Local Window1 Open Status (Bit 4),
Local Window2 Open Status (Bit 3)

This bit is set to 1 (ON) when a corresponding window is open. It is returned to 0
(OFF) when a corresponding window is closed. (It remains 1 (ON) even if the
window screen number is switched in the middle of operation.)

It is possible to know the screen number of the window that is currently open or
the display position (bottom-left coordinate) by checking the window control
area.

Strobes

The screen switching, numeral setting, and character string setting strobes are
automatically returned to 0 (OFF) after notification to the host. The status of op­erations at the PT can easily be ascertained by detecting the leading edges of
these strobes.

However, when connected to a CVM1/CV-series CPU Unit, if the PC is set for
asynchronous operation, the leading edge may not be detected.

2-2-3 Window Control Area (Host ↔ PT)

Data is written to the window control area from both the PT and the host. The
status of the window is always written.

When the data is written to this area from the host, the PT reads the data and
display the window with the specified number at the designated position.

When the display status of the window (screen No., display position) is changed
due to the operation at PT, current status of the window is written to the words
allocated in the host. The host can determine the display status of the window by
reading this area.

The window control area is configured as nine consecutive words as shown be­low. The first word (word k) is set in the Control/Notify Area settings in the PT
configuration settings made with the Support Tool.

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit

Word

k

k+1

k+2

k+3

k+4

k+5

k+6

k+7

k+8

Screen No. (4-digit BCD or hexadecimal)

X coordinate (4-digit BCD or hexadecimal)

Y coordinate (4-digit BCD or hexadecimal)

Screen No. (4-digit BCD or hexadecimal)

X coordinate (4-digit BCD or hexadecimal)

Y coordinate (4-digit BCD or hexadecimal)

Screen No. (4-digit BCD or hexadecimal)

X coordinate (4-digit BCD or hexadecimal)

Y coordinate (4-digit BCD or hexadecimal)

2-2SectionAreas for Control/Notification

Global window

Local Window1

Local Window2

Reference: It is not necessary to allocate words in the host for window control area when the

window is not controlled from the host or when the window is not used.

Words Allocated for the
Window Control Area

Symbol C-series PCs Allocation CV-series PCs Allocation CS/CJ-series PCs Allocation

None IR Area OK CIO Area OK CIO Area OK

H HR Area OK --- --- HR Area

A AR Area OK Auxiliary Area No Auxiliary Area OK

L LR Area OK --- --- LR Area

Words can be allocated for the window control area (PT to host) in the following
host (PC) data areas.

Not for

Host Link

*1

Not for

Host Link

65

Symbol AllocationCS/CJ-series PCsAllocationCV-series PCsAllocationC-series PCs

2-2SectionAreas for Control/Notification

T

TU --- --- --- ---

C

CU --- --- --- ---

W --- --- --- --- WR Area

TK --- --- --- --- Task Flags No

D DM Area OK DM Area OK DM Area OK

E

E0_ to
EC_

TC Area,
Timer PVs

TC Area,
Counter PVs

EM Area *2,
current bank

--- --- --- ---

No

No

OK

*1: LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.

*2: The EM Area is supported only by the C200HX/HG/HE (-Z)E PCs.

Timer Area,
Timer PVs

Counter Area,
Counter PVs

EM Area,
current bank

No

No

Not for

Host Link

TC Area,
Timer PVs

TC Area,
Timer Completion Flags

TC Area,
Counter PVs

TC Area,
Counter Completion Flags

EM Area,
current bank

EM Area,
EM banks 0 to C

No

No

No

No

Not for

Host Link

Not for

Host Link

Not for

Host Link

The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func­tions, and it cannot be used for purposes other than system use.

The range of each memory area differs according to the PC. Refer to Appendix D
PC Memory Maps on page 435.

The screen numbers that can be specified are as follows:

BCD Hexadecimal Screen

0000 0000 No display (window closed)

0001 to 3999 0001 to 0F9F Window screen No. 1 to 3,999

The X coordinates that can be specified are as follows:

PT BCD Hexadecimal Contents

X coordinate of bottom-left corner
NT21
NT31/C
NT631/C

0000 to 0240
0000 to 0300
0000 to 0620

0000 to 00F0
0000 to 012C
0000 to 026C

(multiple of 20)

NT21: 0 to 240
NT31/NT31C: 0 to 300
NT631/NT631C: 0 to 620

The Y coordinates that can be specified are as follows:

PT BCD Hexadecimal Contents

66

NT21
NT31/C
NT631/C

0019 to 0139
0019 to 0239
0019 to 0479

0013 to 008B
0013 to 00EF
0013 to 01DF

Y coordinate of bottom-left corner

(multiple of 20 - 1)

NT21: 19 to 139
NT31/NT31C: 19 to 239
NT631/NT631C: 19 to 479

2-2SectionAreas for Control/Notification

Reference:  Local window can be also opened, closed or moved by the operation of touch

switch (page 308, 308). In addition, by setting the attribute of the screen (base
screen) to be displayed, local window pops up at the same time the screen is
displayed (refer to page 45).

 Global window can be controlled only by writing to the window control area

from the host.

 Window position (coordinate) can be specified by 20 dot unit. (Y coordinate =

multiple of 20-1, because of the bottom-left coordinate specification)
Window can not be controlled and the contents of the window remains un­changed when the number other than multiple of 20 is specified for X coordi­nate or when the number other than multiple of 20-1 is specified for Y coordi­nate.
However, when opening a new window, the window is displayed at the position
that was specified when the window screen was created using the Support
Tool.

Functions of the Window
Control Area

If the PT is currently operating, the status of the window is always written to the
window control area. The contents of the window control area depends on the
window type (global window/local window) and the circumstances as follows:

When the Window Is Opened by Touch Switch Operation (Local Window
Only)

A window screen that is set for a touch switch pops up at the position that was
specified when the window was created using the Support Tool. At this time, the
status of the window is written to the screen No.. X coordinate and Y coordinate
of window control area (corresponding window type).

When the Window Is Closed by Touch Switch Operation (Local Window
Only)

The screen No.. X coordinate and Y coordinate of window control area (corre­sponding window type) are all cleared to 0.

When the Window Screen No. Is Specified for Screen No. of Window Con­trol Area

The specified window is opened as the corresponding window type. The window
position follows the contents of X coordinate and Y coordinate of window control
area. However, in the following cases, the window is opened at the position that
was specified when the window was created using the Support Tool. (Window
move operation is not performed and the X, Y coordinates return to the existing
value when the incorrect X coordinate and Y coordinate are specified without
changing the screen No..)

• When the contents of X coordinate is not multiple of 20, or when the contents of

Y coordinate is not multiple of 20-1

• When the window will extend out of the screen with the specified value (for ex-

ample, when an NT31/NT31C is being used and an X coordinate of 300 and a
Y coordinate of 199 are specified for a window screen of 100100 dots).

When 0 Is Written to the Screen No. of Window Control Area

Window of the corresponding type is closed. The contents of X coordinate and Y
coordinate is retained.

When the Screen Is Switched to the Other While the Window Is Being Dis­played (Other Than System Screen)

The behavior depends on the screen type as shown below. (Even when the glob­al window and the local window were displayed before screen switching, the
each screen also behaves as the table below.)

67

2-2SectionAreas for Control/Notification

Window type Screen No.

X coordi-

nate

Y coordi-

nate

Status

Global window Retains the existing value Remain opened

Local window Cleared to 0 Closed (*)

* If the local window open attribute is set for the screen switched to, the local

window opens.

When the Screen Is Switched to System Screen, Error Screen or System
Menu, while the Window Is Being Displayed.

The behavior depends on the screen type as shown below. (Even when the glob­al window and local window were displayed before screen switching, the each
screen also behaves as the table below. )

Window type Screen No.

X coordi-

nate

Global window Retains the existing value Closed

Local window Cleared to 0 Closed

Y coordi-

nate

Status

If a standard screen or overlapping screens are displayed again, the same glob­al window will be opened at the same position but the local window will not be
opened.

System screens that close global window are as follows:

• System initializing screen (screen number 9000)

• Programming Console function screen (screen number 9020)

• Device Monitor function screen (screen number 9021, 9022, or 9023)

With Occurrence history screen (screen number 9001) and frequency history
screen (screen number 9002) global window remains opened.

Data is written to the window control area from both the PT and the host. The
meaning of the data differs according to whether it is written from the PT or the
host.

When the Data Is Written from the Host

To switch, open, close or move a window on the PT by an instruction from the
host, write the window screen number or coordinates to the window No.. X coor­dinate or Y coordinate as 4-digits BCD or hexadecimal. Whether the values are
BCD or hexadecimal is determined by the setting for numeral storage type in the
PT configuration settings made with the Support Tool.

By changing the screen No.. window can be switched, opened or closed.

It is possible to move the window position by changing the X coordinate and Y
coordinate.

PT PC

Local Window1 opens

(Window screen No.125)

Window control area

Screen No.

X coordinate

Y coordinate

← 0125

← 0060
← 0099

Local Window1

68

Bottom left coordinate (60, 99)

2-2SectionAreas for Control/Notification

Screen No., X Coordinate, and Y Coordinate of the Window Control Area

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit

k+6

k+7

k+8

Local
Window2

Screen No. (4-digit BCD or hexadecimal)

X coordinate (4-digit BCD or hexadecimal)

Y coordinate (4-digit BCD or hexadecimal)

k

k+1

k+2

Global
Window

Word

k+3

k+4

k+5

Local
Window1

When the Data Is Written from the PT

When the display status of the window is changed by the operation at PT, new
window screen No. or coordinates is written to the window No.. X coordinate or Y
coordinate as 4-digits BCD or hexadecimal from the PT. When the window is
opened or closed, window open/close status is written to the window open status
(page 312) of PT status in PT notify area.
Whether the values are BCD or hexadecimal is determined by the setting for nu­meral storage type in the PT configuration settings made with the Support Tool.

PC

0314
0200

0219

Window control area

Screen No.

X coordinate

Y coordinate

Local Window2

Window open

touch switch

PT

Local Window2 opens

(Window screen No.314)

open

Bottom left coordinate (200, 219)

Local Window2

Open Status

2-2-4 Clock Data Area (Host to PT, NT21 Only)

The NT21 has a clock function that displays the date and time, but the data is
periodically read from the host. The PT clock data can be updated by updating
the contents of this area from the host.

The clock data area consists of 4 continuous words, as shown below. The first
word, j, is set under the Set Clock Address settings made with the Support Tool.

15

Word

j

14131211109876543210

Minutes (2-digit BCD)

j + 1

j + 2

j + 3

Day of month (2-digit BCD) Hour (2-digit BCD)

Year (2-digit BCD) Month (2-digit BCD)

Always 00 Day of week (2-digit BCD)

PT notify area

PT status

Bit

Seconds (2-digit BCD)

Reference: It is not necessary to allocate words in the host for the clock data area when the

clock data is not displayed or the screen display/alarm history is not used.

69

2-2SectionAreas for Control/Notification

Words Allocated for the
Clock Data Area

Symbol C-series PCs Allocation CV-series PCs Allocation CS/CJ-series PCs Allocation

None IR Area OK CIO Area OK CIO Area OK

H HR Area OK --- --- HR Area

A AR Area OK Auxiliary Area No AR Area OK

L LR Area OK --- --- LR Area

T

TU --- --- --- ---

C

CU --- --- --- ---

W --- --- --- --- WR Area

TK --- --- --- --- Task Flags No

TC Area,
Timer PVs

TC Area,
Counter PVs

Words can be allocated for the clock data area (host to PT) in the following host
(PC) areas.

Not for

Host Link

Not for

Host Link

No

No

No

No

Not for

Host Link

No

No

Timer Area,
Timer PVs

Counter Area,
Counter PVs

No

No

*1

TC Area,
Timer PVs

TC area,
Timer Completion Flags

TC Area,
Counter PVs

TC Area,
Counter Completion Flags

D DM Area OK DM Area OK DM Area OK

E

E0_ to
EC_

EM Area *2,
current bank

--- --- --- ---

OK

*1: LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.

*2: The EM Area is supported only by the C200HX/HG/HE(-Z)E PCs.

EM Area,
current bank

Not for

Host Link

EM Area,
current bank

EM Area,
EM banks 0 to C

Not for

Host Link

Not for

Host Link

The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func­tions, and cannot be used for purposes other than system use.

The range of each memory area differs according to the PC. Refer to Appendix D
PC Memory Maps on page 435.

The clock data that can be specified is listed in the following table.

Item Data (BCD) Remarks

Seconds 00 to 59
Minutes 00 to 59
Hour 00 to 23 24-hour time
Day of month 01 to 31
Month 01 to 12
Year 00 to 99 Rightmost two digits of year
Day of week 00 to 06 See following table.

70

Days of the week are expressed as follows:

Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Value 00 01 02 03 04 05 06

2-2SectionAreas for Control/Notification

Reference:  The NT21’s clock function is not a counter. This function just displays the most

recent clock data read from the host.

 After the NT21 is turned ON, the default date and time (01/01/00 00:00:00) will

be displayed if the data in the PT is not correct until the clock data is read prop­erly from the host.

 The clock function does not strictly check the date and day of the week settings.

The data must therefore be set correctly so that there is no discrepancy be­tween the date and the day of a week

 The clock data cannot be set from the NT21’s System Menu or the NT Support

Tool.

 The clock data is always BCD regardless of the setting of the Storage Type set-

ting made in the PT configuration settings from the Support Tool.

Clock Data Area
Functions

The PT periodically reads the contents of the Clock Data Area to update the
clock data in the PT.

The structure of the clock data in the PT is the same as the structure of the words
containing the clock data in the CS/CJ-series and C-series PCs. If these words
are allocated for the Clock Data Area with the NT21, then the clock data will be
automatically synchronized during operation if the words are allocated.

If the structure of the clock data in the host is not the same as the structure in the
PT (or the words containing the clock data in the host cannot be allocated), use
the ladder program to update the Clock Data Area periodically, e.g., by copying
the contents of the PC’s clock data to the Clock Data Area.

Reference: Numeral memory table entries 247 to 253 are reserved for the clock function

(read-only) and the clock data is automatically stored in them. Refer to 3-10 Dis-
play and Setting of Calendar Clock for the methods used to display the date or
time.

71

2-3 Memory Tables

The PT has the following three types of memory area that can be written to freely
from the host.

• Numeral memory table for numeric value data Page 72

• Character string memory table for text data Page 79

• Bit memory table for bit data Page 83

The contents of numeral/character string memory table entries can be displayed
for individual memory table entries at the Support Tool, and set in table editing.

Reference: In addition to the memory tables listed above, there is a mathematical table in

which a calculation formulas can be registered. For details, refer to 2-18 Mathe-
matical Function (page 278).

2-3-1 Numeral Memory Table

2-3SectionMemory Tables

Function Outline

Restrictions

Numeral memory table is contained in internal memory of the PT for recording
numeric value data.

Since words can be allocated in the host for numeral table entries, the contents
of host words can be displayed as numeric values at the PT via the numeral
memory table.

Numeral memory table entries are assigned numeral memory table entry num­bers so that they can be managed and designated individually.

PT

1234

9999

Display

Display

Numeral memory table entry 1

Numeral memory table entry 5

PC

Allocated word

• The number of numeral memory table entries can be set as one of the following

in the System settings in the PT configuration settings made at the Support
Tool.

• 512 (numeral memory table entry numbers 0 to 511)

• 1000 (numeral memory table entry numbers 0 to 999)

• 2000 (numeral memory table entry numbers 0 to 1999)

Since the numeral memory table shares memory with the screen data, setting a
large number of numeral memory table entries reduces the memory area avail­able for screen data.

72

 The data quantity of one numeral memory table entry can be set to either of the

following by setting at the Support Tool.

1 word (2 bytes)/2 words (4 bytes)

• Since numeral memory table entry numbers 1000 and higher are not backed

up by the battery, they return to the initial values set with the Support Tool when
the power to the PT is turned ON, when the PT is reset, and on transition from
the System Menu to the RUN mode, regardless of the setting made for the re­sume function.

• Numeral memory table entry numbers 247 to 255 are used with the clock func-

tion of the PT. These table entries cannot be used for other applications. For
details on the clock function, refer to 2-16-6 Clock Function (page 251).

2-3SectionMemory Tables

I/O

Common Attributes

Numeral memory table entries have the following properties.

Property

Value

Initial

Storage
Type

 For BCD format:

–9999999 to 99999999

 For binary format:

–2147483648 (80000000H) to 2147483647 (7FFFFFFH)

The initial values that can be set as the contents of memory table en­tries by the Support Tool
The format is determined by the system memory of the PT and the Nu­meral Storage Type setting.
For details, refer to Storage type and stored data (page 74).

Check mark (initialize)/No check mark (do not initialize)

This setting determines whether or not the allocated words at the host
are initialized when the power to the PT is turned ON, when the PT is
reset, and on transition from the System Menu to the RUN mode.
Initialization here means initialization of the allocated words at the host:
when a check mark is set, the previously existing numeral memory table
contents are written to the host words. When no check mark is set, the
data at the host is read and set in the numeral memory table entries.

System/Binary/BCD

Method for storing numeric data in numeral memory table entries.
This setting is valid only when a word is allocate for the numeral table
entry in the host. Numeral memory table entries that are not allocated
words in the host always use binary format. If a setting is made for Sys­tem. it complied with the Numeral Storage Type setting of PT configura­tion.
For details, refer to Storage type and stored data (page 74).

Possible Settings

Meaning

0/1/2

Words

PC
Address

I/O
Comment

The number of words allocated in the host for the numeral memory table
entry.
For details, refer to Allocated words (page 73).

Any word address at the host

Word at the host allocated for the numeral memory table entry.
When two words are allocated for the numeral memory table entry, des­ignate the first (lower) word.
For details, refer to Allocated words (page 73).

Up to 16 characters of text

Comment that describes the contents of a numeral memory table entry

Allocated Words

Either one or two words can be allocated at the host for each numeral memory
entry. Words can be allocated in the following host (PC) areas.

Symbol C-series PCs Allocation CV-series PCs Allocation CS/CJ-series PCs Allocation

None IR Area OK CIO Area OK CIO Area OK

H HR Area OK --- --- HR Area

A AR Area OK Auxiliary Area No AR Area OK

L LR Area OK --- --- LR Area

*1

Not for

Host Link

Not for

Host Link

T

TC Area,
Timer PVs

1-word en-

tries only

Timer Area,
Timer PVs

1-word en-

tries only

TC Area,
Timer PVs

1-word en-

tries only

73

Symbol AllocationCS/CJ-series PCsAllocationCV-series PCsAllocationC-series PCs

2-3SectionMemory Tables

TU --- --- --- ---

C

CU --- --- --- ---

W --- --- --- --- WR Area

TK --- --- --- --- Task Flags No

D DM Area OK DM Area OK DM Area OK

E

E0_ to
EC_

TC Area,
Counter PVs

EM Area *2,
current bank

--- --- --- ---

1-word en-

tries only

OK

*1: LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.

*2: The EM Area is supported only by the C200HX/HG/HE(-Z)E PCs.

Counter Area,
Counter PVs

EM Area,
current bank

Not for

Host Link

Not for

Host Link

TC Area,
Timer Completion Flags

TC Area,
Counter PVs

TC Area,
Counter Completion Flags

EM Area,
current bank

EM Area,
EM banks 0 to C

No

1-word en-

tries only

No

Not for

Host Link

Not for

Host Link

Not for

Host Link

The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func­tions, and it cannot be used for purposes other than system use.

The range of each memory area differs according to the PC. Refer to Appendix D
PC Memory Map on page 435.

The relationships among the allocated words, the number of allocated words,
and the contents of numeral memory table entry are indicated in the figure be­low.

When the Number of Allocated Words Is 1 Word

PT

Numeral memory table entry

162E

(Decimal number 5678)

Only four digits read

PC

5162738

← Allocated word

4

When the Number of Allocated Words Is Two Words

PT

Numeral memory table entry

00BC614E

(Decimal number 12345678)

Eight digits read

PC

5162738

← Allocated word

4

Storage Type and Stored Data

A numeral memory table entry internally stores the specified number of words of
data as signed binary data. When the contents of words allocated in the host are
stored in a memory table entry, the numeric value is interpreted according to the
Storage Type setting and is stored after conversion to signed binary data. Also,
the signed binary data in numeral memory table entries is written to the words
allocated in the host according to the Storage Type setting.

Accordingly, different Storage Type settings will cause the same data to be rec­ognized by the PT as different values and written to the host as different values.

Reference: Signed binary data expresses negative values as the complement of two (the bits

are inverted and 1 is added).

74

• Storage Type For The BCD Format

1 allocated word

2 allocated words

g

,

,

$

y

,

,

$

y

When using BCD format, the contents of the word(s) at the host are interpreted
as BCD (binary coded decimal) data. However, since it is not possible to input a
negative sign in a host word, the letter F at the most significant digit is used
instead to denote negative values (a negative sign can be used in the setting
for Value. so negative values can be input in the normal manner for this set­ting).

If a value with a letter from A to E inclusive as its most significant digit, or a
value with a letter from A to F inclusive at any position other than the most
significant digit is stored in a host word, it is invalidated as illegal data and the
existing value is retained.

If the contents of a numeral memory table entry exceeds the range that can
be handled by the allocated words in the host, the value is written to the host
as negative sign + less significant digits (see below).

2-3SectionMemory Tables

Contents of numeral memory

table entry (decimal notation)

12345 → 2345

–12345 → F345

123456789 → 23456789

–12345678 → F2345678

Data at

host

Conditions

1 allocated word
When using BCD format

2 allocated words
When using BCD format

• Storage Type For Binary Format

When binary format is used, the initial value and contents of the host word(s)
are interpreted as signed binary data and are stored without change in the nu­meral memory table entry.

With binary format, the most significant bit is the sign bit (when this bit is 1 it
indicates a negative value). When there is one allocated word, the most sig­nificant bit is bit 15; when there are two allocated words it is bit 31.

The initial value is always expressed as a 2-word signed binary value re­gardless of the Storage Type setting.

However, when the initial value is input using the Support Tool, the basis for
input is always the decimal system. The – symbol can be input to indicate a
negative value. If $ is input at the head of the input value, it will be input as a
hexadecimal value (after confirmation of input, it is displayed in decimal).

Data Flow and Stored Data

The table below indicates how the set Value (initial value) and the contents of
host words are stored in numeral memory table entries. (The examples show
initial values that are set with the Support Tool and written to the host when the
Resume function is not being used.)

confirmation)

123,456 123,456 0001 E240 BCD

$1E240 Binary

–123,456 –123,456 FFFE 1DC0 BCD

$FFFE 1DC0 Binary

Support Tool values

Input Value

(before

--- 1 2 --- --- 3 4

Input Value

(after

confirmation)

Stored value

before op-

eration

Storage

Type of

1 3456 0000 0D80 3,456
2 0012 3456 0001 E240 123,456
1 E240 FFFF E240 –7,616
2 0001 E240 0001 E240 123,456
1 F456 FFFF FE38 –1,456
2 F012 3456 FFFE 1DC0 –123,456
1 1DC0 0000 1DC0 7,616
2 FFFE 1DC0 FFFE 1DC0 –123,456

Number

Words

Contents of
host words after start of

Stored value

operation

Stored Value

in decimal

75

2-3SectionMemory Tables

,

,

$

y

,

$

y

$

y

Support Tool values Stored Value

Input Value

(before

confirmation)

--- 43------21

61,441 61,441 0000 F001 BCD

$F001 Binary

65535 65,535 0000 FFFF BCD

$FFFF Binary

–1 –1 FFFF FFFF BCD

$FFFF FFFF Binary

Input Value

(after

confirmation)

Stored value

Stored value

before op-

before op-

eration

eration

Storage

Storage

Type

Type

Number

Number

of

of

Words

Words

1 1441 0000 05A1 1,441
2 61441 0000 F001 61,441
1 F001 FFFF F001 –4,095
2 0000 F001 0000 F001 61,441

1 5535 0000 159F 5,535
2 0006 5535 0000 FFFF 65,535
1 FFFF FFFF FFFF –1
2 0000 FFFF 0000 FFFF 65,535

1 F001 FFFF FFFF –1
2 F000 0001 FFFF FFFF –1
1 FFFF FFFF FFFF –1
2 FFFF FFFF FFFF FFFF –1

Contents of

Contents of
host words

host words

Stored value

Stored value
after start of

after start of

operation

operation

Stored Value

Numeral Table Memory Data before Start of Operation

1, 2, 3... 1. Initial value inputs at the Support Tool are written into the numeral memory

table entries as 2-word signed binary data regardless of the Storage Type or
Number of Words settings. (Even when the value is written in hexadecimal
with the $ prefix, it will be displayed in decimal at the Support Tool after the
input is confirmed.)

in decimal

in decimal

2. Before operation starts, the contents of the numeral memory table entries
are retained within the PT as 2-word signed binary data regardless of the
Storage Type or Number of Words settings.

Numeral Table Memory Data at the Start of Operation

3. When operation is started, the contents of numeral memory table entries are
written to words in the host first. At this point, data is converted and written as
described below according to the Storage Type or Number of Words set­tings.

Storage

Type

BCD 1

BCD 2

Binary 1

Binary 2 The 2-word signed binary data is written as is.

Number

of words

Conversion and storage

The 2-word signed binary data is converted to BCD and
the least significant 4 digits are written. If the value is
negative, F and the least significant 3 digits are written.

The 2-word signed binary data is converted to BCD and
the 8 digits are written. If the value is negative, F and
the least significant 7 digits are written.

The least significant 4 digits of the 2-word signed binary
data are written as is.

4. After operation has started, the host words are read and the data is regularly
mirrored in the numeral memory table entries. The data is converted and

76

2-3SectionMemory Tables

written as described below according to the Storage Type or Number of
Words settings.

Storage

Type

BCD 1

BCD 2

Binary 1

Binary 2

Number

of words

Conversion and storage

The contents of the host words are treated as 4-digit
BCD, converted to 2-word signed binary data, and
stored. (If the most significant digit is F. the remaining
data is treated as negative 3-digit BCD.)
Words that do not contain 4-digit BCD or F and 3 BCD
digits are invalid and the numeral memory table entries
will be left unchanged.

The contents of the host words are treated as 8-digit
BCD, converted to 2-word signed binary data, and
stored. (If the most significant digit is F. the remaining
data is treated as negative 7-digit BCD.)
Two-word fields that do not contain 8-digit BCD or F
and 7 BCD digits, are invalid and the numeral memory
table entries will be left unchanged.

The contents of the host words are treated as signed
binary data (a sign bit and 15 data bits), converted to
2-word signed binary data, and stored.

The contents of the host words are treated as signed
binary data (a sign bit and 31 data bits) and stored as
is.

Resume Function and Initial Values

When the resume function is not used, the preset initial values are written in the
numeral memory table entries when the power to the PT is turned ON, the PT is
reset, or the PT is switched to RUN mode from the System Menu. (See Initialize
below.)

Use the resume function to prevent initialization and retain the last values that
were in place before operation stopped.

Resume function setting Numeral memory table contents

Yes The previous numeral memory table values are used.
No The numeral memory table’s initial values are used.

The System Menu’s initialize operation can be used to write the initial values to
the memory table entries regardless of the resume function setting. When the
resume function is used, the previous values will be used even if the initial values
are changed, so changes to the initial values won’t be reflected in the table en­tries. Initialize the memory table values before starting operation to reflect chan­ges in initial values.

With the NT21, the resume function can be used only if the optional Battery is
used. Without the Battery, the resume function will not operate even if the func­tion is set to Yes .

Initialize

The initialize setting determines whether the contents of numeral memory table
entries are written to the allocated word(s) in the host when the power to the PT
is turned ON, when the PT is reset, or the PT is switched to RUN mode from the
System Menu.

Here, initialize means the initialization of the contents of host word(s) as they are
overwritten by the contents of the numeral memory table. If a word is not allo­cated for the numeral memory table entry in the host, this setting has no effect.

77

2-3SectionMemory Tables

Word al

Reference: When the PT starts operation, the contents of numeral memory table entries is as

follows depending on whether or not a word is allocated for the numeral memory
table entry in the host, on the Initial setting for the numeral memory table entry,
and on whether or not the resume function is used:

Display Functions

Input Functions

Word al-

located

in host?

Yes

No (Ineffective)

Initial set-

Checked

Not checked Contents of host word(s)

ting

Used (Battery must be

present.)

Existing numeral memory
table value retained (at
host word(s) also)

When the numeral memory table is initialized by System
Menu operation: initial value of the numeral memory
table entry (at host word(s) also)

Existing numeral memory
table value

When the numeral memory table is initialized by System
Menu operation: initial value of the numeral memory
table entry

Resume function

Not used

Initial value of numeral
memory table entry used
(at host word(s) also)

Initial value of numeral
memory table entry

Numeral memory table entries themselves have no display function.
To display the contents of numeral memory table entries, use 2-8 Numeral Dis-

play (page 140) or 2-10 Graphs (page 154). Specify numeral memory table en­tries when displaying numeral displays as guide characters of lamps or touch
switches as well.

When one or two words are allocated in the host for numeral memory table en­tries, the contents of the words is read and stored.

However, reading is only executed for those numeral memory table entries that
are being used for the currently displayed screen (when copying a memory table
entry, the contents of the allocated word(s) of the copy source memory table
entry is read) or specified as operands in the mathematical function.

Output Functions

When one or two words are allocated in the host for a numeral memory table
entry, the contents of the numeral memory table is written to the word(s).

However, writing is only executed in the following cases.

• When the contents of the numeral memory table entry has changed as a result

• When the Initial setting at the Support Tool is checked when the power to the

• When using words allocated for the numeral memory table entry in the host as

Processing Functions

The contents of word(s) allocated in the host are interpreted and stored in accor­dance with the attributes that have been set (refer to Common Attributes on
page 73). Data is converted according to the preset attributes even when the
contents of numeral memory table entries changed with PT operations are being
written to words in the host.

Relationship with Other Elements

• When numeral display is used, the contents of numeral memory table entries

78

of operations at the PT, such as memory table entry copying by touch switch
operation, or use of the numeral setting function

PT is turned ON, the PT is reset, or on transition from the System Menu to the
RUN mode (the contents of all numeral memory table entries that are allocated
words in the host and whose initial setting is checked are written)

destinations for the calculation results of the mathematical function

can be displayed in real time as numeric values (page 140).

2-3SectionMemory Tables

• When a bar graph is used, the contents of a numeral memory table entry can

be displayed in real time in bar graph form (page 154).

• When an analogue meter is used, the contents of a numeral memory table

entry can be displayed in real time in the form of quarter, semi-circle or circle­shaped graph.

• When a broken line graph is used, the contents of multiple, consecutive nu-

meral memory table entries can be displayed in real time in the form of a bro­ken line graph (page 164).

• When a trend graph is used, changes over time in the contents of a numeral

memory table entry can be displayed in the form of a broken line graph (page

171).

• When a lamp’s guide character is made into a numeral display, the contents of

a numeral memory table entry can be displayed numerically in real-time (page

112).

• When a touch switch’s guide character is made into a numeral display, the con-

tents of a numeral memory table entry can be displayed numerically in real­time (page 119).

• When a numeral setting is used, numeric values can be input into the numeral

memory table entry from the screen of the PT (page 192).

• When a thumbwheel switch is used, numerical values can be input into the nu-

meral memory table entry from the screen of the PT (page 200).

• When the touch switch copy setting function is used, the contents of a numeral

memory table entry can be copied, and constants can be input to the numeral
memory table entry (page 135).

• By operation of the PT status control area, data can be copied between

memory table entries from the host (page 52).

• If the contents of numeral memory table entries are changed by operation at

the PT, the change is notified to the PT status notify area (page 61).

• A numeral memory table entry can be specified as the location of operands

used by the mathematical function or the destination of calculation results
(page 278).

2-3-2 Character String Memory Table

Function Outline

abcde

ABCDE

Restrictions

Character string memory table entries are internal memories of the PT for re­cording character string data.

Since words can be allocated for character string memory table entries in the
host, the contents of words at the host can be displayed as character strings at
the PT via the character string memory table.

Character string memory table entries are assigned character string memory
table entry numbers so that they can be managed and designated individually.

PT

Display

Display

Character string memory table entry 8

Character string memory table entry 12

• The number of character string memory table entries can be set as one of the

following at the Support Tool.

• 256 (character string memory table entry numbers 0 to 255)

• 1000 (character string memory table entry numbers 0 to 999)

PC

Read

Allocated word

79

2-3SectionMemory Tables

• 2000 (character string memory table entry numbers 0 to 1999)
Since the character string memory table shares memory with the screen

data, setting a large number of character string memory table entries re­duces the memory area available for screen data.

• The data quantity of one character string memory table entry can be set as fol-

lows by setting at the Support Tool (a setting of 0 indicates no allocation):

0 to 40 characters (= 0 to 40 bytes, which is 0 to 20 words)

• Character string memory table entry numbers 500 and higher always remain

at the initial value set with the Support Tool. These values cannot be changed
later and can only be read. Words cannot be allocated for these table entries in
the host either.

• The characters that can be stored in character string memory table entries are

alphanumerics, symbols, and marks (codes FF20 to FFFFH).

Reference:  If 00

Common Attributes

H (NULL code) is encountered in a character string, the subsequent data

is ignored.

 If codes outside the ranges indicated above are written to the allocated words

at the host, the character strings may not be displayed correctly.

 When the PT is set to NT20S and NT30/NT620 compatible mode, image and

library codes can be included in the character strings. Refer to Appendix C for
details on the NT20S and NT30/620 compatible modes.

Character string memory table entries have the following properties.

Property

Value

Initial

Alphanumerics and symbols, Marks

Character string in the initial status after the contents of the character
string memory table have been initialized.

Check mark (initialize)/No check mark (do not initialize)

This setting determines whether or not the allocated words at the host
are initialized when the power to the PT is turned ON, when the PT is
reset, and on transition from the System Menu to the RUN mode.
Initialization here means initialization of the allocated words at the host:
when a check mark is set, the previous character string memory table
contents is written to the host words. When no check mark is set, the
data at the host is read and set in the character string memory table
entries.

Possible Settings

Meaning

80

PC
Address

Words

I/O
Comment

Any word address at the host

Host word(s) allocated for the character string memory table entry.
Designate the first (lower) word.
For details, refer to Allocated words (page 80).

1 to 20

The number of words allocated in the host for the character string
memory table entry.
For details, refer to Allocated words (page 80).

Up to 16 characters of text

Comment that describes the contents of a character string memory table
entry

Allocated Words

One to twenty words can be allocated at the host to each character string table
entry. Words can be allocated in the following host (PC) areas.

2-3SectionMemory Tables

Symbol C-series PCs Allocation CV-series PCs Allocation CS/CJ-series PCs Allocation

None IR Area OK CIO Area OK CIO Area OK

H HR Area OK --- --- HR Area

Not for

Host Link

A AR Area OK Auxiliary Area No AR Area OK

L LR Area OK --- --- LR Area

T

TC Area,
Timer PVs

No

TU --- --- --- ---

C

TC Area,
Counter PVs

No

CU --- --- --- ---

Timer Area,
Timer PVs

Counter Area,
Counter PVs

No

No

TC Area,
Timer PVs

TC Area,
Timer Completion Flags

TC Area,
Counter PVs

TC Area,
Counter Completion Flags

W --- --- --- --- WR Area

*1

Not for

Host Link

No

No

No

No

Not for

Host Link

TK --- --- --- --- Task Flags No

D DM Area OK DM Area OK DM Area OK

E

E0_ to
EC_

EM Area *2,
current bank

OK

--- --- --- ---

EM Area,
current bank

Not for

Host Link

EM Area,
current bank

EM Area,
EM banks 0 to C

Not for

Host Link

Not for

Host Link

*1: LR 00000 to LR 00199 are converted to CIO 01000 to CIO 01199.

*2: The EM Area is supported only by the C200HX/HG/HE(-Z)E PCs.

The Auxiliary Area of the CVM1 and CV-series PCs is allocated to system func­tions, and it cannot be used for purposes other than system use.

The range of each memory area differs according to the PC. Refer to Appendix D
PC Memory Maps on page 435.

The relationships among the allocated words, the number of allocated words,
and the contents of character string memory table entries are indicated in the
figure below.

Example: Number of allocated words = 4 words

1

4

A = 41H, B = 42H First word
C = 43H, D = 44H First word + 1

 = FF01
E = 45

H First word + 2

H, F = 46H First word + 3

4
4
F
4

2

3

4

3

F

0

1

5

4

6

ABCDEF

Resume Function and Initial Values

When the resume function is not used, the preset initial values are written in the
character string memory table entries when the power to the PT is turned ON,
the PT is reset, or the PT is switched to RUN mode from the System Menu. (See
Initialize below.)

Use the resume function to prevent initialization and retain the last values that
were in place before operation stopped.

Resume setting Character string memory table contents

Yes The previous character string memory table values are used.
No The character string memory table entry’s initial values are

used.

81

2-3SectionMemory Tables

Words al

Checked

The System Menu’s initialize operation can be used to write the initial values to
the memory table entries regardless of the resume function setting. When the
resume function is used, the previous values will be used even if the initial values
are changed, so changes to the initial values won’t be reflected in the table en­tries. Initialize the memory table values before starting operation to reflect chan­ges in initial values.

With the NT21, the resume function can be used only if the optional Battery is
used. Without the Battery, the resume function will not operate even if the func­tion is set to Yes .

Initialize

The initialize setting determines whether the contents of character string
memory table entries are written to the allocated word(s) in the host when the
power to the PT is turned ON, when the PT is reset, or the PT is switched to RUN
mode from the System Menu.

Here, initialize means the initialization of the contents of host word(s) as they are
overwritten by the contents of the numeral memory table entry. If no words are
allocated for the character string memory table entry in the host, this setting has
no effect.

Reference: When the PT starts operation, the contents of character string memory table en-

tries are as follows depending on whether or not the character string memory
table entry is allocated words in the host, on the initial setting for the character
string memory table entry, and on whether or not the resume function is used:

Display Functions

Words al-

located

at host?

Yes

No (Ineffective)

Initial Set-

Checked

Not checked Contents of host word(s)

ting

Used (Battery must be

present.)

Existing character string
memory table value re­tained (at host word(s)
also)

When the character string memory table is initialized by
System Menu operation: initial value of the character
string memory table entry (at host word(s) also)

Existing character string
memory table value

When the character string memory table is initialized by
System Menu operation: initial value of the character
string memory table entry

Resume Function

Not Used

Initial value of character
string memory table entry
used (at host word(s) also)

Initial value of character
string memory table entry

Character string memory table entries themselves have no display function.
To display the contents of character string memory table entries, use 2-9 Char-

acter String Display (page 148).
Character strings can also be displayed as messages by using the alarm list

(page 182) and alarm history (page 182) functions.
Specify character string memory table entries when displaying character string

displays as guide characters of lamps or touch switches as well.

Input Functions

82

When one or more words are allocated for a character string memory table entry
in the host, the contents of the words is read and stored.

However, reading is only executed for those character string memory table en­tries that are being used for the currently displayed screen (when copying a
character string memory table entry, the contents of the allocated word(s) of the
copy source memory table entry is read).

2-3SectionMemory Tables

Output Functions

When one or more words are allocated for a character string memory table entry
at the host, the contents of the character string memory table entry are written to
the word(s).

However, writing is only executed in the following cases.

• When the contents of the character string memory table entry have changed

• When the Initial setting of string table entry is checked when the power to the

Processing Functions

Character string memory table entries have no data processing function.

Relationship with Other Elements

• When character string display is used, the contents of character string memory

• When alarm list or alarm history is used, the contents of the character string

• When a lamp’s guide character is made into a character string display, the con-

• When a touch switch’s guide character is made into a character string display,

• When character string input is used, character strings can be input into the

• When the touch switch copy setting function is used, the contents of a charac-

• By operation of the PT status control area. data can be copied between

• If the contents of character string memory table entries are changed by opera-

as a result of operations at the PT, such as memory table copying by touch
switch operation, or use of the character string input function

PT is turned ON, the PT is reset, or on transition from the System Menu to the
RUN mode (the contents of all words allocated for character string memory
table entries in the host and whose initial setting is checked are written.)

table entries can be displayed in real time as character strings (page 148).

memory table entry can be displayed as a message (page 182).

tents of a character string memory table entry can be displayed as guide char­acters in real-time (page 112).

the contents of a numeral memory table entry can be displayed as guide char­acters in real-time (page 119).

character string memory table entry from the screen of the PT (page 210). It is
also possible to input character strings from a bar code reader connected to
the PT.

ter string memory table entry can be copied (page 135).

memory table entries from the host (page 52).

tion at the PT, the change is notified to the PT status notify area (page 61).

2-3-3 Bit Memory Table

Function Outline

The bit memory table is held in memory for bit data.
Bits are allocated to bit memory table entries in the host, and the status of the bit

is monitored so that a specific function can be executed in accordance with the
status of the bit.

Bit memory table entries are assigned bit memory table entry numbers so that
they can be managed and designated individually.

Bit memory table entries have the following functions.

Screen Changeover Function

When the host bit allocated for a bit memory table entry changes status from 0
(OFF) to 1 (ON), the screen whose screen number is set in the bit memory table
entry is displayed.

Screen number 11
displayed

Screen number 10
Screen number 11
Screen number 12

No. 1

No. 2
No. 3

Bit PC

0
0

← 1 (ON)

0

83

2-3SectionMemory Tables

If the allocated bits of multiple bit memory table entries come ON at the same
time, the bit memory table entry with the smallest number takes priority.

Alarm List/History Function

When the status of the host bit allocated for a bit memory table entry changes to
1 (ON), the contents of the character string memory table entry (message), and
the image/library data set for that bit memory table entry are displayed (this is the
alarm list function). In order to use the alarm list function, it must be registered for
the screen in advance. If more than one bit memory table entry is set for the
alarm list function, those with smaller bit memory table entry numbers are given
display priority, therefore it is possible to assign an order or priority to displayed
messages.

If registration in the alarm history is designated, the time when the status of the
host bit allocated for the bit memory table entry changes to 1 (ON) is recorded in
the alarm history (alarm history function).

For details, refer to 2-11 Alarm List, Alarm History (page 182).

Character string
memory table entry 32

Image/library
data 102A

Message (character string memory table entry 32)
and image/library data (102A) set for bit memory
table entry 14.

Character string memory table entry 50
Image/library data 0F51

Character string memory table entry 32
Image/library data 102A

Character string memory table entry 54
Image/library data 12AB

No. 13

No. 14

No. 15

Bit PC

0
0

← 1 (ON)

0

Operation when Using the Alarm List/History Function

The operation when using the alarm list/history function is as follows:

Reference:  For the alarm list function, display is in ascending order of bit memory table

entry numbers. For the alarm history function display is in occurrence order
(from newest record/from oldest record) or frequency order.

 With the alarm list function, when the host bit allocated for the bit memory table

entry returns to 0 (OFF) during display, the message and image/library data is
automatically cleared.

1, 2, 3... 1. When the status of a bit memory table entry changes to 1 (ON), the contents

of the set character string memory table entry are displayed as a message.

84

Contents of character string memory table entry
set for the bit memory table entry whose status
has changed to 1 (ON).

PROCESS 3 STOPPED

WATER TANK OVERHEATING

If an alarm list with multiple lines is
created, alarms are displayed in
ascending order of bit memory table
entry numbers.
If the bit memory table entries are set in
ascending order of priority, the display
will also be arranged in accordance
with the order of priority.