Omron NT31 Series User guide

Cat. No. V062-E1-03
Programmable Terminals
NT31 and NT31C
Setup Manual

NT31and NT31C
Programmable Terminals
Setup Manual
Revised June 2004

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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 dam-
age to property.
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers
to an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient operation
of the product.
1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.
OMRON, 2000
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permis-
sion 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 informa-
tion contained in this publication.

vi

TABLE OF CONTENTS
vii
PRECAUTIONS xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Intended Audience xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1
General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 Role and Operation of the NT31/NT31C 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Functions of the NT31/NT31C 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 System Configuration 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Communications with the Host 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Communications Using Memory Links 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6 Before Operating 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2
Preparing for Connection 23. . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Method for Connection to the Host 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Names and Functions of Parts 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3
Hardware Settings and Connections 29. . . . . . . . . . . . . . . .
3-1 Installation 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Connecting to the Support Tool 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Connecting a Printer 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 Connecting a Bar Code Reader 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 Using a Memory Unit (-VVersions) 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-6 Using a Memory Unit (Versions without the -VSuffix) 45. . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4
Connecting to the Host from the RS-232C Port 51. . . . . . .
4-1 Connecting to the RS-232C Port at the Host 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5
Connecting to the Host from the RS-422A/485 Port 83. . . .
5-1 Connecting to the Host’s RS-232C Port 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2 Connecting to the Host’s RS-422A/485 Port 98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6
System Menu Operation 129. . . . . . . . . . . . . . . . . . . . . . . . . .
6-1 System Menu Operation Flow 131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Starting the NT31/NT31C 132. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 Operation Modes and the System Menu 133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4 Memory Initialization 138. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5 Operations in the System Installer Mode 148. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-6 Transmitting the Screen Data 153. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-7 Setting Conditions for Communications with Host by Using Memory Switches 155. . . . . . .
6-8 Starting Operation 166. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-9 System Settings 166. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-10 Setting the Bar Code Reader Input Function 186. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11 System Maintenance 189. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-12 Programming Console Function 219. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-13 Device Monitor Function 225. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-14 Version Display 228. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS
viii
SECTION 7
Troubleshooting and Maintenance 229. . . . . . . . . . . . . . . . . .
7-1 Troubleshooting 230. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2 Responding to Displayed Error Messages 233. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-3 Maintenance of the NT31/NT31C 239. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-4 Inspection and Cleaning 243. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
A Specifications 247. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Dimensions 255. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Using an RS-232C/RS-422A Convertor Unit 259. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Transporting and Storing the NT31/NT31C 265. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E Making the Cable 267. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F Making the Cable for Connecting a PLC 269. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G Making the Cable for Connection to a Bar Code Reader 271. . . . . . . . . . . . . . . . . . . . . . . . . . .
H Making the Cable for Connection to a Printer 273. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I Relationship between System Program and Hardware 275. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J Model List 279. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K Option List 285. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 289. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History 293. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ix
About this Manual:
This manual describes connecting the NT-series NT31 and NT31C Programmable Terminals to a PLC
(Programmable Controller) or other host and peripheral devices and the settings required for communica-
tions and applications. It includes the sections described below.
Please read this manual carefully and be sure you understand the information provided before attempting
to install and operate the Programmable Terminal.
Section 1 provides fundamental information about the functions and features of the PTs, types of connec-
tion, communication methods, etc. This information will enable you to understand the applications of the
PTs.
Section 2 describes the connection methods that are possible with the PTs, and the functions of the parts
of PTs, as the required knowledge before connecting to the host and to the peripheral devices.
Section 3 describes the settings of the PTs and methods for connection to peripheral devices.
Section 4 describes the method for connecting to the host using the RS-232C port of the PT.
Section 5 describes the method for connecting to the host using the RS-422A/485 port of the PT.
Section 6 describes the operation of the System Menu, focusing on the procedure to start the PT. Func-
tions that are convenient when using the PT and those that are useful for system maintenance are also
explained here.
Section 7 describes the action to take when errors occur in the PT, and how to carry out maintenance and
inspection to prevent the occurrence of errors.
The Appendices provide specifications, dimensions, procedures for using an RS-232C/RS-422A Con-
vertor Unit, procedures for transporting and storing the PT, information on cable preparation, information
on the relationship between the system program and hardware, and product lists.
WARNING Failure to read and understand the information provided in this manual may result in
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
NT31 and NT31C PT Setup Manual (V062-E1-, this manual)
This manual describes connecting the Programmable Terminals to a host and
peripheral devices and settings required for communications and applications.
The functions and actual operating methods for the NT31 and NT31C PTs are
provided in the Reference Manual (V064-E1-).
Programmable Terminal Functions and Operation
NT31/31C/631/631C PT Reference Manual (V064-E1-)
This manual is used for any of the following PTs: NT31, NT31C, NT631, and
NT631C. It describes screen configurations, part functions, host control meth-
ods, and other application information.
PT connection and setup procedures are described in the NT31 and NT31C PT
Setup Manual (V062-E1-).
Creating and Transferring Screen Data, and Installing the System Program
NT-series Support Tool for Windows Ver. 4.1 Operation Manual (V061-E1-)
The screens displayed on the NT31 and NT31C PTs are created with the Support
Tool and transferred to the PT. This manual describes how to create and transfer
screen data. It also describes how to download a system program to a PT using
the System Installer.
The NT-series Support Tool for Windows is normally referred to as merely the
Support Tool.
Connecting to Controllers Not Made by OMRON
PLC Connection Manual (V042-E1-)
The NT31 and NT31C PTs can be connected to controllers in the following se-
ries: Mitsubishi A Series and FX Series. This manual describes the connection
and setup methods for these controllers.
The NT-series Support Tool for Windows Version 4.1 is required to connect the
NT31 and NT31C PTs to these controllers.
NT31/NT631 Multi Vendor Connection Manual (V060-E1-)
The NT31 and NT31C PTs can be connected to controllers in the following se-
ries: Allen-Bradley SLC 500 Series, GE Fanuc 90-20 and 90-30 Series, and Sie-
mens S7-300 and S7-400 Series. This manual describes the connection and set-
up methods for these controllers.

xi
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 Ter-
minal. You must read this section and understand the information contained before attempting to set up or operate a
Programmable Terminal.
1 Intended Audience xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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3Safety Precautions
xii
1 Intended Audience
This manual is intended for the following personnel, who must also have knowl-
edge of electrical systems (an electrical engineer or the equivalent).
•Personnel in charge of introducing FA systems into production facilities.
•Personnel in charge of designing FA systems.
•Personnel in charge of installing and connecting FA systems.
•Personnel in charge of managing FA systems and facilities.
2 General Precautions
The user must operate the product according to the performance specifications
described in the operation manuals.
Before using the product under conditions which are not described in the manual
or applying the product to nuclear control systems, railroad systems, aviation
systems, vehicles, combustion systems, medical equipment, amusement ma-
chines, safety equipment, and other systems, machines and equipment that
may have a serious influence on lives and property if used improperly, consult
your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide the
systems, machines, and equipment with double safety mechanisms.
This manual provides information for using the Programmable Terminal. Be sure
to read this manual before attempting to use the software and keep this manual
close at hand for reference during operation.
WARNING It is extremely important that Programmable Terminals and related devices be
used for the specified purpose and under the specified conditions, especially in
applications that can directly or indirectly affect human life. You must consult
with your OMRON representative before applying Programmable Terminals to
the above-mentioned applications.
WARNING Do not use input functions such as PT touch switches for applications where
danger to human life or serious damage is possible, or for emergency switch
applications.
3 Safety Precautions
Read these safety precautions carefully and make sure you understand them
before using the Programmable Terminal so that you can use it safely and cor-
rectly.
This operation manual uses the following conventions and symbols to indicate
cautions, warnings, and dangers in order to ensure safe use of the NT31/31C.
The cautions, warnings, and dangers shown here contain important information
related to safety. The instructions in these cautions, warnings, and dangers must
be observed.
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
Safety Conventions
andtheir Meanings

3Safety Precautions
xiii
WARNING
Do not attempt to take the unit apart and do not touch any
internal parts while the power is being supplied. Doing either of
these may result in electrical shock.
WARNING
Switch OFF the NT31/NT31C power before replacing the
backlight. Otherwise you could sustain an electric shock.
CAUTION
Do not touch the backlight immediately after switching OFF
the power supply.
Otherwise burn injuries may result due to the high
temperatures.

1
SECTION 1
General
This section provides fundamental information about the functions and features of the PTs, types of connection, communica-
tion methods, etc. This information will enable you to understand the applications of the PTs.
1-1 Role and Operation of the NT31/NT31C 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1-1 Operation of an NT31/NT31C at an FA Production Site 2. . . . . . . . . . . . . . . . . . . .
1-1-2 Operations of the NT31/NT31C 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Functions of the NT31/NT31C 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-1 Features 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-2 Comparison between NT31 and NT31C 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-3 Additional Functions of the V2 Versions 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-4 Comparison between NT30/NT30C and NT31/NT31C 6. . . . . . . . . . . . . . . . . . . .
1-2-5 Principal Functions of NT31/NT31C 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-6 Displays 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 System Configuration 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3-1 Peripheral Devices That Can Be Connected 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3-2 Connecting to the Host 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Communications with the Host 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-1 Direct Connection Function 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-2 Host Link 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-3 NT Link 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-4 Connecting to other Companies’ PLCs 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Communications Using Memory Links 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5-1 Memory Link 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5-2 Comparison between Direct Connection and Memory Link 20. . . . . . . . . . . . . . . . .
1-5-3 Memory Link Online Transfer Function 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6 Before Operating 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1SectionRole and Operation of the NT31/NT31C
2
1-1 Role and Operation of the NT31/NT31C
The NT31/NT31C is a sophisticated display unit (programmable terminal) which
automatically displays information and can also be used for operations when
necessary. The following gives a general description of the role and operation of
the NT31/NT31C for those using a programmable terminal (PT) for the first time.
1-1-1 Operation of an NT31/NT31C at an FA Production Site
The NT31/NT31C displays real-time information about the system and equip-
ment operating status, etc. Its power of expression is enhanced by graphs and
other visuals, making the displays easy to understand.
Production Control (3)
Product
% achieved
Today’s target 560 441
Current production 305 275
Number defective 2 8
Number repaired 7 15
The NT31/NT31C warns of system or equipment failures and prompts the ap-
propriate 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
Setting touch switches on the NT31/NT31C allows workers to use the
NT31/NT31C as an operating panel; the results of the operations are trans-
mitted to the host.
Electroplating control
Transport Electr.
head
Wash.
head
Corr. prv.
head
Clamp
Unclamp
Int. stop
Adv.
Rev.
Electro-
lyte Wash Corr.
prv.fluid
Production Line Status
Monitoring
Directions to Workers on
the Shop Floor
Panel Switch Functions

1-1SectionRole and Operation of the NT31/NT31C
3
1-1-2 Operations of the NT31/NT31C
The information to be displayed (screen data) can be created on a computer us-
ing the Support Tool and stored in the NT31/NT31C. The screen data can be
displayed on the NT31/NT31C 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.
The NT31/NT31C can be connected to the host by a host link or NT link and re-
ceive 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.
Touch panel
Host
ON/OFF information, numeric
data, etc.
The screen data to be displayed on the NT31/NT31C can be created on a per-
sonal computer using the Support Tool. Connect the NT31/NT31C to the per-
sonal computer with an RS-232C cable and transmit the screen data to the
NT31/NT31C.
Create screen data.
Personal
computer
(Support Tool)
Screen data
RS-232C
When the host is connected at serial port A,
the personal computer is only connected
when communicating screen data between
the NT31/NT31C and Support Tool.
Displays Screens
Receives Data from a
Host
Sends Data to a Host
Screen Data

1-2SectionFunctions of the NT31/NT31C
4
1-2 Functions of the NT31/NT31C
The NT31/NT31C has the following features.
1-2-1 Features
Downsized Body
•Slim body (50 mm or less in the panel*).
•The communication cable connectors are housed in the unit so that they do not
protrude from the unit.
* When mounted in a panel of the recommended thickness (page 30).
Construction Best Suited to the FA Environment
•The panel is an STN monochrome LCD type with backlight for the NT31 and an
STN color LCD type with backlight for the NT31C.
•The backlight unit and battery can be replaced at the operation site.
•Waterproofed equivalent to the NEMA4 standard and to IP65F*.
* The panel may not be usable in environments where it is exposed to oil for long
periods.
POWER
RUN
320 dots
240 dots
Wide angle of visibility
Contrast and brightness are adjustable by touch switch operations.
Compatibility with Other PTs
•There is upward compatibility between the NT31/NT31C and the following
models for screen data and user programs: NT11S, NT20S, NT30, NT30C,
NT600S, NT610G, NT610C, NT620S, NT620C, NT625C, NT631, NT631. (Af-
ter being read to the Support Tool, screens must be modified in accordance
with the screen size. Depending on the function used, partial modification of
programs may also be necessary. For details on the compatibility of screen
data, refer to the NT31/NT31C/NT631/NT631C Programmable Terminal Ref-
erence Manual and the NT-series Support Tool Operation Manual.
•The dimensions of the panel cut-out to accommodate the NT31/NT31C are the
same as for the NT30/NT30C.
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 (type NT-MF261) on the rear of the NT31/NT31C
makes it easy to write screen data into the NT31/NT31C on site. This enables a
rapid response to setup changes.
•NT31/NT31C can store a system program into a memory unit. This enables the
system to handle more flexible setups.
Touch Switch Operation

1-2SectionFunctions of the NT31/NT31C
5
Screen data can be checked simply by operations at the NT31/NT31C system
menu, without connecting up to the Support Tool.
The 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 consid-
erably increased, making it possible to create more expressive screens. For de-
tails, refer to Display Restrictions in Appendix A Specifications of the
NT31/NT31C/NT631/NT631C Programmable Terminal Reference Manual.
It is now possible to write binary data stored in words at the host directly to the
NT31/NT31C. This makes data conversion by a program at the host unneces-
sary, reducing the load on the host.
Any quadrupled characters are displayed with a 32 dot high-definition font.
By using the system installer supplied with the Support Tool (Type NT-
ZJCAT1-EV4), the system program at the NT31/NT31C can be changed easily
from a personal computer.
The NT31/NT31C meets UL/CSA standards and EC directives.
Compatible with Sequencers in the following series: Mitsubishi A-series (Calcu-
lator Link) and FX-series (Programming Console), Allen-Bradley SLC 500 Se-
ries, GE Fanuc 90-20 and 90-30 Series, and Siemens S7-300 and S7-400 Se-
ries. Specialized system programs can be installed that allow the NT31/NT31C
to be controlled from other companies’ Sequencers.
Up to 3 windows can be displayed simultaneously in the normal screen. A
9-word window control area has been allocated to the host; the contents of these
9 words can be changed from the Host to open, close, and move windows.
1-2-2 Comparison between NT31 and NT31C
Two NT31 models — the NT31, which is capable of versatile graphic displays,
and the NT31C, which is also capable of color display — are available. The dif-
ferences between the NT31 and NT31C are tabled below:
Function NT31 NT31C
Type NT31-ST121-EV2 (Beige)
NT31-ST121B-EV2 (Black)
NT31-ST122-EV2 (Beige)
NT31-ST122B-EV2 (Black)
NT31C-ST141-EV2 (Beige)
NT31C-ST141B-EV2 (Black)
NT31C-ST142-EV2 (Beige)
NT31C-ST142B-EV2 (Black)
Display panel STN monochrome LCD display
type (with white backlight)
STN color LCD type
(with white backlight)
Beige and black are the front panel colors of each NT31/NT31C types.
1-2-3 Additional Functions of the V2 Versions
The V2 versions of NT31/NT31C are supplemented and enhanced by the fol-
lowing functions.
The V2 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 formula) can be registered to allow the PT to
perform calculations automatically and write the results of those calculations to
numeral memory tables or words in the host.
The new device monitor function can be used to change the PLC’s operating
mode or display/change values in the PLC’s memory areas. The present values
(PVs) of several words can be listed with the device monitor.
Screen Data Check
Function
Increased Screen Data
Capacity
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 Version Upgrades
Complies with
International Standards
Compatible with Other
Vendors’ Devices
Multiple Windows
High-speed 1:N NT Link
Additional Mathematical
Functions
Device Monitor Function

1-2SectionFunctions of the NT31/NT31C
6
PT operations and inputs can be disabled from the PLC if interlock bits have
been allocated in the PLC for the corresponding PT touch switches, numeric in-
puts, or string inputs.
The following displays can be performed with lamp or touch switch labels:
•Display several lines of labels.
•Switch the display between different labels when OFF and ON.
•Display the numeral memory table contents as labels.
•Display the string memory table contents as labels.
The word configuration of the PT status control area and PT status notify area
can be set to emulate those of the NT30/NT30C or NT620S/NT620C/NT625C;
this mode is called NT30/620 compatible mode.
When the PT is operating in NT30/620 compatible mode, it will be equivalent to
an NT30/NT30C or NT620S/NT620C/NT625C in the functions listed below. The
PT retains full V2 functionality in all functions other than the ones listed below.
Refer to Appendix C in the NT31/NT31C/NT631/NT631C Programmable Termi-
nal Reference Manual for more details.
•Word configuration and functions of the PT status control area and PT status
notify area
•Image/library codes
•Insertion of image/library data into character strings
Data areas in CS-series PLCs that were previously inaccessible can be ac-
cessed. The data areas listed below can be accessed (read/written).
All banks in the EM area, timer completion flags (TU), counter completion
flags (CU), Work areas (WR), Task flags (TK), and the HR area.
You can set the data (numeric values) for multiple words in record units using the
tabular elements on the PT screen, and write these settings in a single operation
to words on the host (i.e., PLC or PT memory) using a touch switch operation on
the PT Unit. Also, multiple words of numeric data can be read from the host in
one operation. In this way, groups of parameter settings can be edited at the PT
Unit, and written to or read from the host.
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.
1-2-4 Comparison between NT30/NT30C and NT31/NT31C
Item NT30/NT30C NT31/NT31C
Support Tool used NT-ZJCAT1-EV4 or NT-ZA3AT-EV2 NT-ZJCAT1-EV4
DIP switches On rear of unit None (software settings)
Use of B7A 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.
- Serial port A connector (also used
for screen data transfer, 9-pin)
- Serial port B connector (for host
communications only, 25-pin)
RS-422A/485 interface Terminal block Serial port B (25-pin D-SUB connector)
Backlight color White/red (selectable) White only
Replacement backlight NT30-CFL01/NT30C-CFL01 NT31C-CFL01
(NT31-ST121-EV2/NT31C-ST141-
EV2 (same for both models).
The backlight for the
NT31-ST122-EV2/NT31C-ST142-
EV2 cannot be replaced by the user.)
Interlock Function
Improved Lamp/Touch
Switch Labels
NT30/NT30C and
NT620S/NT620C/NT625C
Emulation
Additional CS-series
Data Areas Accessible
Recipe Function
Adjusting Contrast and
Brightness During PT
Operation

1-2SectionFunctions of the NT31/NT31C
7
Item NT31/NT31CNT30/NT30C
NT31/NT31C system program data NT-ZS3AT-EV1
(including system installer)
The system installer and system pro-
gram data are supplied with the Sup-
port Tool.
High-speed 1:N NT Link Not possible Possible*1
Memory Link System program Exclusive use by Memory Link Same as OMRON connection
y
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 Maximum of 2000 Maximum of 3999
Screen data capacity*2
(User program memory)
512 KB 1 MB
Numeral string data Maximum of 1000 Maximum of 2000
Character string data Maximum of 1000 Maximum of 2000
Bit data 256 Maximum of 1000
Mathematical tables None 256 max.
Calculations can be executed
automatically in the PT.*1
Image data Maximum of 224 Maximum of 4095*3
Library data Maximum of 896 Maximum of 12288*3
Method for storing numeric values
(numeral memory data and PT status
control area)
Fixed as BCD (binary coded decimal) Selectable from BCD (binary coded
decimal) or binary
PT status control area size 4 words 5 words (partial change of contents)*3
PT status notify area size 3 words 2 words (partial change of contents)*3
Window control area size None 9 CH*2
Registering continuous screen Possible Not possible (Use a screen switchover
as a substitute.)
Lamp/Touch switch labels Fixed display (1 line only) - Multiple lines can be displayed*1
- ON/OFF switching is possible*1
- Numeral display is possible*1
- Character string display is possible*1
Interlock function None Operations can be disabled from the
PLC by allocating interlock bits to the
corresponding touch switch, numeral
input, or character string input.*1
Device monitor function Not possible Possible*1
Recipe function None Possible
Accessible CS-series PLC data
areas
--- The data areas listed below can be
accessed in addition to the data areas
accessible with the NT30/NT30C.*5
- EM banks (EM_0 to EM_C)
- Timer completion flags (TU)
- Counter completion flags (CU)
- Work areas (WR)
- Task flags (TK)
- HR area
*1: These functions are available only in V2 versions of the NT31/NT31C.
*2: This is the capacity of the flash memory that stores screen data.
*3: The values are the same as the NT30/NT30C when the PT is in NT30/620 compatible mode.
*4: The window control area can be used only in the Vversions of the NT31/NT31C.
For differences in programming, refer to Appendix B in the NT31/NT31C/NT631/NT631C Programmable Terminal Refer-
ence Manual.

1-2SectionFunctions of the NT31/NT31C
8
1-2-5 Principal Functions of NT31/NT31C
The following are the principal functions of the NT31/NT31C.
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 tables and numeral memory tables can be displayed. The
contents of memory tables 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 tables
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.
Functions relating to data output
Buzzer
A built-in buzzer can be sounded.
Screen printing
A hard copy of the currently displayed screen can be printed at the printer
connected to the NT31/NT31C.