Omron NT31, NT31C User Manual
Setup Manual
Programmable Terminals
NT31 and NT31C
Cat. No. V062-E1-02
NT31and NT31C
Programmable Terminals
Setup Manual
Revised January 2003
iv
Notice:
OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or damage to property.
DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or
!
serious injury.
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.
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, 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 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.
v
vi
TABLE OF CONTENTS
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 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Communications with the Host 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Communications Using Memory Links 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6 Before Operating 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2
Preparing for Connection 25. . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Method for Connection to the Host 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Names and Functions of Parts 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3
Hardware Settings and Connections 31. . . . . . . . . . . . . . . .
3-1 Installation 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Connecting to the Support Tool 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Connecting a Printer 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 Connecting a Bar Code Reader 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 Using a Memory Unit (-Vj Versions) 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-6 Using a Memory Unit (Versions without the -Vj Suffix) 47. . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4
Connecting to the Host from the RS-232C Port 53. . . . . . .
4-1 Connecting to the RS-232C Port at the Host 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5
Connecting to the Host from the RS-422A/485 Port 85. . . .
5-1 Connecting to the Host’s RS-232C Port 86. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2 Connecting to the Host’s RS-422A/485 Port 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6
System Menu Operation 131. . . . . . . . . . . . . . . . . . . . . . . . . .
6-1 System Menu Operation Flow 133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Starting the NT31/NT31C 134. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 Operation Modes and the System Menu 135. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4 Memory Initialization 140. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5 Operations in the System Installer Mode 150. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-6 Transmitting the Screen Data 155. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-7 Setting Conditions for Communications with Host by Using Memory Switches 157. . . . . . .
6-8 Starting Operation 168. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-9 System Settings 168. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-10 Setting the Bar Code Reader Input Function 188. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-11 System Maintenance 191. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-12 Programming Console Function 221. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-13 Device Monitor Function 227. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-14 Version Display 230. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vii
TABLE OF CONTENTS
SECTION 7
Troubleshooting and Maintenance 231. . . . . . . . . . . . . . . . . .
7-1 Troubleshooting 232. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2 Responding to Displayed Error Messages 235. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-3 Maintenance of the NT31/NT31C 241. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-4 Inspection and Cleaning 245. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 PC 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 277. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
K Option List 283. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 285. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History 289. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
viii
About this Manual:
This manual describes connecting the NT-series NT31 and NT31C Programmable Terminals to a PC
(Programmable Controller) or other host and peripheral devices and the settings required for communications and applications. It includes the sections described below.
Please read this manual carefully and be sure you understand the information provided before attempting
to install and operate the Programmable Terminal.
Section 1 provides fundamental information about the functions and features of the PTs, types of connection, 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 Convertor 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.
ix
TABLE OF CONTENTS
Related Manuals:
Related manuals are listed below.
The j symbol at the end of the catalog number is the revision number.
Connecting and Setting Up the Programmable Terminal
S NT31 and NT31C PT Setup Manual (V062-E1-j, 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-j).
Programmable Terminal Functions and Operation
S NT31/31C/631/631C PT Reference Manual (V064-E1-j)
This manual is used for any of the following PTs: NT31, NT31C, NT631, and
NT631C. It describes screen configurations, part functions, host control methods, and other application information.
PT connection and setup procedures are described in the NT31 and NT31C PT
Setup Manual (V062-E1-j).
Creating and Transferring Screen Data, and Installing the System Program
S NT-series Support Tool for Windows Ver. 4.1 Operation Manual (V061-E1-j)
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
S PC Connection Manual (V042-E1-j)
The NT31 and NT31C PTs can be connected to controllers in the following series: Mitsubishi A Series and FX Series. This manual describes the connection
and setup methods for these controllers.
The NT-series Support Tool for Windows Version 4.1 is required to connect the
NT31 and NT31C PTs to these controllers.
S NT31/NT631 Multi Vendor Connection Manual (V060-E1-j)
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.
x
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 xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
xi
1 Intended Audience
This manual is intended for the following personnel, who must also have knowledge of electrical systems (an electrical engineer or the equivalent).
• Personnel in charge of introducing FA systems into production facilities.
• Personnel in charge of designing FA systems.
• Personnel in charge of installing and connecting FA systems.
• Personnel in charge of managing FA systems and facilities.
2 General Precautions
The user must operate the product according to the performance specifications
described in the operation manuals.
Before using the product under conditions which are not described in the manual
or applying the product to nuclear control systems, railroad systems, aviation
systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems, machines and equipment that
may have a serious influence on lives and property if used improperly, consult
your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide the
systems, machines, and equipment with double safety mechanisms.
This manual provides information for using the Programmable Terminal. Be sure
to read this manual before attempting to use the software and keep this manual
close at hand for reference during operation.
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
andtheir Meanings
WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
!
serious injury.
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.
Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or
!
moderate injury, or property damage.
xii
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
3Safety Precautions
Do not touch the backlight immediately after switching OFF
the power supply.
Otherwise burn injuries may result due to the high
temperatures.
xiii
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 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 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-4 Comparison between NT30/NT30C and NT31/NT31C 7. . . . . . . . . . . . . . . . . . . .
1-2-5 Principal Functions of NT31/NT31C 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2-6 Displays 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 System Configuration 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3-1 Peripheral Devices That Can Be Connected 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3-2 Connecting to the Host 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Communications with the Host 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-1 Direct Connection Function 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-2 Host Link 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-3 NT Link 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4-4 Connecting to other Companies’ PCs 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Communications Using Memory Links 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5-1 Memory Link 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5-2 Comparison between Direct Connection and Memory Link 21. . . . . . . . . . . . . . . . .
1-5-3 Memory Link Online Transfer Function 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6 Before Operating 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
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
1-1SectionRole and Operation of the NT31/NT31C
Production Line Status
Monitoring
Directions to Workers on
the Shop Floor
The NT31/NT31C 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 NT31/NT31C 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 NT31/NT31C allows workers to use the
NT31/NT31C 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 NT31/NT31C
1-1SectionRole and Operation of the NT31/NT31C
Displays Screens
Receives Data from a
Host
The information to be displayed (screen data) can be created on a computer using 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 receive necessary data from the host.
Host link, NT link
Host
Sends Data to a Host
Screen Data
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.
The screen data to be displayed on the NT31/NT31C can be created on a personal computer using the Support Tool. Connect the NT31/NT31C to the personal computer with an RS-232C cable and transmit the screen data to the
NT31/NT31C.
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 NT31/NT31C and Support Tool.
Personal
computer
(Support Tool)
3
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 32).
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.
1-2SectionFunctions of the NT31/NT31C
320 dots
POWER
RUN
240 dots
Wide angle of visibility
Touch Switch Operation
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. (After being read to the Support Tool, screens must be modified in accordance
with the screen size. Depending on the function used, partial modification of
programs may also be necessary. For details on the compatibility of screen
data, refer to the NT31/NT31C/NT631/NT631C Programmable Terminal 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.
4
1-2SectionFunctions of the NT31/NT31C
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
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 considerably increased, making it possible to create more expressive screens. For details, refer to Display Restrictions in Appendix A Specifications of the
NT31/NT31C/NT631/NT631C Programmable Terminal Reference Manual.
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 unnecessary, 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 NTZJCAT1-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 (Calculator Link) and FX-series (Programming Console), Allen-Bradley SLC 500 Series, GE Fanuc 90-20 and 90-30 Series, and Siemens S7-300 and S7-400 Series. Specialized system programs can be installed that allow the NT31/NT31C
to be controlled from other companies’ Sequencers.
Multiple Windows
Up to 3 windows can be displayed simultaneously in the normal screen. A
9-word window control area has been allocated to the host; the contents of these
9 words can be changed from the Host to open, close, and move windows.
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 differences between the NT31 and NT31C are tabled below:
Function NT31 NT31C
Type NT31-ST121-EV2 (Beige)
NT31-ST121B-EV2 (Black)
Display panel STN monochrome LCD display
type (with white backlight)
Beige and black are the front panel colors of each NT31/NT31C types.
NT31C-ST141-EV2 (Beige)
NT31C-ST141B-EV2 (Black)
STN color LCD type
(with white backlight)
5
1-2-3 Additional Functions of the V2 Versions
The V2 versions of NT31/NT31C are supplemented and enhanced by the following functions.
1-2SectionFunctions of the NT31/NT31C
High-speed 1:N NT Link
Additional Mathematical
Functions
Device Monitor Function
Interlock Function
Improved Lamp/Touch
Switch Labels
NT30/NT30C and
NT620S/NT620C/NT625C
Emulation
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 PC’s operating
mode or display/change values in the PC’s memory areas. The present values
(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.
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.
Additional CS1 Data
Areas Accessible
Recipe Function
Adjusting Contrast and
Brightness During PT
Operation
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 CS1 PCs that were previously inaccessible can be accessed. The
data areas listed below can be accessed (read/written).
All banks in the EM area, timer completion flags (TU), counter completion
flags (CU), Work areas (WR), Task flags (TK), and the HR area.
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
1-2-4 Comparison between NT30/NT30C and NT31/NT31C
y
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.
RS-422A/485 interface Terminal block Serial port B (25-pin D-SUB connector)
Replacement backlight NT30-CFL01/NT30C-CFL01 NT31C-CFL01 (common use)
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 Maximum of 2000 Maximum of 3999
Screen data capacity*2
512 KB 1 MB
(User program memory)
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.
Image data Maximum of 224 Maximum of 4095
Library data Maximum of 896 Maximum of 12288
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 CH*2
Registering continuous screen Possible Not possible (Use a screen switchover
Lamp/Touch switch labels Fixed display (1 line only) - Multiple lines can be displayed
Interlock function None Operations can be disabled from the
Device monitor function Not possible Possible
- Serial port A connector (also used
for screen data transfer, 9-pin)
- Serial port B connector (for host
communications only, 25-pin)
The system installer and system program data are supplied with the Support Tool.
1
Calculations can be executed
automatically in the PT.
*1
*3
*3
decimal) or binary
as a substitute.)
*1
- ON/OFF switching is possible
- Numeral display is possible
*1
*1
- Character string display is possible
PC by allocating interlock bits to the
corresponding touch switch, numeral
input, or character string input.
*1
*1
1-2SectionFunctions of the NT31/NT31C
3
3
*1
7
Item NT31/NT31CNT30/NT30C
Recipe function None Possible
Accessible CS1 PC data areas --- The data areas listed below can be
accessed in addition to the data areas
accessible with the NT30/NT30C.
- EM banks (EM_0 to EM_C)
- Timer completion flags (TU)
- Counter completion flags (CU)
- Work areas (WR)
- Task flags (TK)
- HR area
*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.
*5
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.
1-2SectionFunctions of the NT31/NT31C
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.
9
Section
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
the screen can be used efficiently.
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 tables 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 communication
Communications with the host
The NT31/NT31C can communicate with the host by four methods: host link, 1:1 NT Link, 1:N NT link (standard or high-speed), and
Memory link. Data can be read from the host, and data input by means of touch switches and numeral/character string settings can be
sent to the host. It is also possible to connect with other model PCs.
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 NT31/NT31C immediately before its operation is stopped can be stored while operation is
stopped, or while the power is off, and then displayed on the screen again when operation is restarted.
Screen 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 CS1G/CS1H PC in a 1:N NT Link connection.
Device Monitor function
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 NT31/NT31C can be changed by using the system installer supplied with the Support Tool (NTZJ3AT1/ZJCAT-EV2). 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 tables displayed in trend graphs can be recorded (logging function). Also, the record can be
maintained even when the trend graph is not displayed (background function).
Mathematical function
This function allows calculations to be executed continuously during PT operation when mathematical table has 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.
. Since the window need only be opened when input is required,
10
1-2-6 Displays
Section
The NT31/NT31C 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 NT31/NT31C are created by using the Support Tool at a personal computer.
Fixed Displays
Characters
(fixed display)
Bar graph
Line 1 Status
Machine name: NT31C-ST141
Production qty.: 137 units
0% 50% 100%
Stage 1
Stage 2
Stop
Restart
Check 2Check 1
Characters
(character string display)
25%
Numeric values
(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
* 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 are graphics comprising any required area of dots. They are registered in advance and as many as required can be displayed at any position on
the screen.
Windows bit map (BMP) data can be used for images.
There is a two-color mode, in which the display color and background color of the
image are specified when it is registered in a screen, and an eight-color mode in
which colors are assigned to the image in advance.
Since image data is composed of dots, it requires a large data size but offers
great powers of expression.
11
Section
Library data are combinations of fixed display graphics registered as a single
graphic. They are registered in advance and as many as required can be displayed at any position on the screen.
Since it is generated by combining graphics, library data has a small data size.
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 labels: fixed display character strings, ON/OFF
switching character strings, numeral displays, and character string displays.
When fixed display character strings or ON/OFF switching character strings are
used, several lines of labels can be displayed.
Normal (Standard) Lamps
ON
ON
Unlit state Lit state
Host
Image Library Lamps
Touch Switches
12
ON
Unlit state Lit state
Host
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
Section
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.
Numeral Displays
String Displays
Numeral Inputs
Touch
switch area
Display
frame
When this
position is
pressed...
Function executed
Shown
in
reverse
video
There are four touch-switch labels: fixed display character strings, ON/OFF
switching character strings, numeral displays, and character string displays.
When fixed display character strings or ON/OFF switching character strings are
used, several lines of labels can be displayed.
Numeric values stored in the numeral memory tables are displayed. The displayed numerals can be changed by changing the data stored in the numeral
memory tables.
Hexadecimal values can also be displayed.
When decimal values are displayed, the number of digits for the integral part and
fractional part of displayed values can be specified in advance.
Character strings stored in the character string memory tables are displayed.
The displayed character strings can be changed by changing the data stored in
the character string memory tables.
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.
String Inputs
12345678
Input
7 8 9
4 5 6
1 2 3
"
0 .
Window
Character strings can be input at the PT by using touch switches, bar code readers, etc. The input character strings can also be stored in a character string
memory table and 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
NT31C
Input
NT31C NT31
NT631C
13
Section
Thumbwheel Switches
Graphs
Numeric values can be input by incrementing or decrementing each digit with
the corresponding touch switch (+, –). The input numeric values can also be
stored in a numeral memory table and notified to the host.
Thumbwheel switch inputs can be enabled and disabled from the host when an
interlock bit has been allocated.
These are graphics whose display changes in accordance with the numeric values stored in numeral memory tables. There are the following four types.
Bar Graphs
Bar graphs display the present value in a numeral memory table converted to a
percentage within the range –100% to +100% of a preset value.
60%
Analog Meters
Analogue meters display, using a quarter, half, or full circle shape, the present
value in a numeral memory table converted to a percentage within the range
–100% to +100% of the preset value. Users can choose from moving pointer
type and filling area type displays. Users can also add graduation to the graph.
60%
Broken Line Graphs
Broken line graphs display, in an easy-to-read form, a sequence of numeral
memory table values converted to a percentage within the range –100% to
+100% of a preset value.
100%
0%
–100%
Example showing a series of 11
numeral memory table values
(with a check mark set for the
display sign)
Trend Graphs
Trend graphs display chronological changes in the value in a numeral memory
table, converting the value to a percentage within the range –100% to +100% of
a preset value. The trend graph shifts position with the passage of time.
Past data can also be recorded, and the numeral memory table can be read
(sampled) even while the trend graph is not being displayed.
The user can choose to stop sampling, restart sampling, or display past data, by
pressing touch switches.
14
Section
Alarm List/History
The alarm list/history function displays messages in list form, or graphics
(image/library data), in accordance with changes in bit memory table statuses.
For the alarm list, a series of bit memory tables are monitored, and messages
(contents of character string memory tables) set for bit memory tables that come
ON are displayed.
For the alarm history, bit memory tables for which the history property is set are
continually monitored, and the time when they come ON and number of times
they come ON are recorded and displayed together with the message (character string) set for the bit memory table.
The NT31/NT31C allows selection of the display order as the newest record first
or the oldest record first by memory switch setting.
The alarm list function is used to determine which bits are ON at the present
time. The alarm history function is used to determine the times at which alarms
occurred in the past and how many times alarms have occurred.
Alarm List
Message (character string table No. 32)
set for bit memory table No. 14
Character string table No. 32
Image/library
data 113C
Character string table No. 50
Image/library data 1002
Character string table No. 32
Image/library data 113C
Character string table No. 54
Image/library data 1125
No.13
No.14
No.15
Bit
0
1
0
A000000
L001003
D010015
HOST
1(ON)
Recipe
When the message displayed is pressed, the image/library
data (113C) set for bit memory table No. 14 is displayed.
Alarm History
Message (character string table No. 13)
set for bit memory table No. 24
Recorded data
Character string table No. 13
Character string table No. 12
Image/library
data 102B
Character string table No. 11
Image/library data 005F
Character string table No. 12
Image/library data 102A
Character string table No. 13
Image/library data 102B
No. 22
No. 23
No. 24
Bit memory table No. 24
97/12/04 11:19:20
Bit memory table No. 23
97/12/04 11:25:12
When the upper message displayed is pressed, the image/library
data (102B) set for bit memory table No. 13 is displayed.
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.
15
1-3 System Configuration
This section shows the configuration of a system that uses an NT31/NT31C. For
details on product models, refer to Appendix J Model List (page 277).
1-3-1 Peripheral Devices That Can Be Connected
The following peripheral devices can be connected to an NT31/NT31C.
Host
Controls the NT31/NT31C as required while controlling machines and
monitoring the production line.
Host Link: C series, CVM1/CV series PC, SRM1
Bar code reader
Bar codes can be read
as character strings.
Printer
For printing out the
currently displayed
NT31/NT31C screen.
RS-232C cable
(max. 15 m)
or
RS-422A/485 cable
(max. 500 m)
Can be connected to CPU units, host link units, and SRM1. However,
connection is not possible to some models of CPU unit and SRM1 (pages 54
and 101).
NT Link: CS1G/CS1H, CPM1, CQM1, C200HS, C200HX/HG/HE(-ZE),
CVM1/CV series PCs, SRM1
Can be connected to CPU units and SRM1. However, connection is notpossible
to some models (pages 67, 72, 111 and 113).
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
1-3SectionSystem Configuration
Support Tool
Used to create screens for the
NT31/NT31C at the personal
computer and transmit them to the
NT31/NT31C, and to make
NT31/NT31C settings.
System installer
Used to change the system
program of the NT31/NT31C.
Memory unit
Can store screen data
and system program to
be read out
automatically at startup.
NT31/NT31C
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.
• Bar code reader (page 37)
• Recommended printers (page 36)
It is also possible to use printers that can emulate an NEC PC-PR201H (using the NEC PC-PR201PL control protocol), and printers that comply with
one of the following EPSON control standards: ESC/P 24-J83C (color), or
ESC/P 24-J82 (monochrome).
• Memory unit (pages 39 and 47)
NT-MF261 (made by OMRON)
• Support Tool (page 35)
NT-series Support Tool Version 4.0 for Windows (Made by OMRON)
• NT-ZJCAT1-EV4 (CD-ROM version)
• System installer (page 35)
System installer (made by OMRON)
The system installer is supplied as a standard accessory with the Support
Tool (NTZJCAT1-EV4).
16
Reference: The following optional devices are available. All of them can be used either with
NT31 or NT31C.
Replacement backlight NT31C-CFL01
Reflection-suppressing protective sheet NT30-KBA04
Chemical-resistant cover NT30-KBA01
Replacement battery 3G2A9-BAT08
1-3-2 Connecting to the Host
The NT31/NT31C has the following two communication ports.
• Serial port A:
D-SUB 9-pin connector
For RS-232C use only (The Support Tool and bar code readers can be connected here.)
• Serial port B:
D-SUB 25-pin connector
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.
1-4SectionCommunications with the Host
Reference: When using an RS-232C/422A convertor unit (NT-AL001) with the host link or NT
link (1:1) communication method, RS-485 cannot be used. The connection must
be made with RS-232C or RS-422A.
1-4 Communications with the Host
The NT31/NT31C is connected to the host by one of the following 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
or FA computer:
• Communications protocol supported by the other company’s PC
• Memory link
In all of these communication methods that can be used with NT31/NT31C, 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 links will be explained in 1-5 Communications Using
Memory Links.
1-4-1 Direct Connection Function
With the NT31/NT31C, the bits and words referring to data required for display,
and those for storing input data, can be allocated to any part of the PC memory
area.
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1-4SectionCommunications with the Host
The NT31/NT31C 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
NT31/NT31C to be read from the memory area in the PC and written to memory
tables in the NT31/NT31C. Also, the data input at the NT31/NT31C can be written to the memory area in the PC. The NT31/NT31C screen can be changed in
accordance with statuses in the PC memory area, and the NT31/NT31C’s status
data can be written to the PC’s memory area.
PCNT31/NT31C
DM area I/O relay area
Auxiliary relay area Timers/counters
Features of the Direct
Connection Function
1-4-2 Host Link
1-4-3 NT Link
The direct connection function has the following features.
• The bits and words referring to operating status and work instruction informa-
tion and those for storing input data can be freely allocated to almost any area
of the PC memory.
• Since the NT31/NT31C can directly refer to PC bit and word data without using
the program at the PC, it can be connected to the PC without changing the PC
program which controls the currently running production line.
• The area to control and notify the NT31/NT31C statuses, including display
screens, display/no display status, and buzzer output, can be freely allocated
to 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 NT31/NT31C to directly read and write
almost all bits and words in the PC and to automatically change the
NT31/NT31C 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 types.
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.
• When using the built-in host link function of a CPU unit or SRM1:
CPM1, CPM2A, CPM2C, CQM1, CQM1H, C200HS, C200HX/HG/HE(-Z)E,
CS1G/CS1H-E(V1), 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
NT31/NT31C can also use the 1:N connection NT Link method, which allows a
maximum of eight PTs to be connected to one PC port.
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