Omron NT20 User manual

Programmable Terminal
Cat. No. V091-E1-01
NT20
USER’S MANUAL

NT-series
Programmable Terminal
User’s Manual
Produced March 2007

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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. Additionally, there may be severe property damage.
!WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury. Additionally, there may be severe property damage.
!Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
The abbreviation “PLC” means Programmable Controller. “PC” is used, however, in some Program-
ming Device displays to mean Programmable Controller.
The abbreviation “Host” means a PLC that controls the NT20.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient opera-
tion of the product.
1,2,3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.
OMRON, 2007
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o
r
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o
f
OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con-
stantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.

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TABLE OF CONTENTS
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
2 General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
5 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix
6 EC Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
SECTION 1
Functions of the NT20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1-1 Role and Operation of NT20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-2 Functions of NT20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1-3 Method for Connection to the Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1-4 Communications with PLC by Direct Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1-5 Communications Using RS-232C (NT20-ST128) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1-6 Before Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SECTION 2
Hardware Settings and Connections. . . . . . . . . . . . . . . . . . . 17
2-1 Description of Parts and Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2-2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2-3 Connecting Link Adapters and RS-422A Converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2-4 Connecting the NT Support Tool. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2-5 Using a Memory Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
2-6 Connecting to the RS-232C Port at the Host. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
2-7 Communicating with the PLC Using C200H Direct Communications. . . . . . . . . . . . . . . . . 73
2-8 Host Connections by RS-232C (NT20-ST128). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
SECTION 3
System Menu Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
3-1 Operation Flow by the System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
3-2 Starting the NT20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
3-3 Operation Modes and the System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
3-4 Initializing Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
3-5 Setting the Conditions of Communications with the Host by Using the Memory Switches. 91
3-6 Registering the Screen Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
3-7 Starting the Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
3-8 Various System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
3-9 System Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
3-10 Transferring the System Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
3-11 Transferring the Resource Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

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SECTION 4
NT20 Functions and Operation . . . . . . . . . . . . . . . . . . . . . . . 133
4-1 Screen Creation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
4-2 Outline of Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
4-3 Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
4-4 Memory Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
4-5 Bar Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
4-6 Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
4-7 Touch Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
4-8 Numeral Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
SECTION 5
How to Use the Host Link/NT Link . . . . . . . . . . . . . . . . . . . 165
5-1 Overview of Direct Connection Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
5-2 Memory Tables and Bar Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
5-3 Lamps, Touch Switches, Numeral Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
5-4 NT20 Status Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
5-5 Notification of the Operating Status to the PLC
(Determining the NT20 Operating Status) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
SECTION 6
Using RS-232C Communications . . . . . . . . . . . . . . . . . . . . . 211
6-1 Table of Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
6-2 RS-232C Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
6-3 Screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
6-4 Memory Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
6-5 Lamps, Touch Switches, Numeral Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
6-6 Controlling the NT20 Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227
6-7 Terminal Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
6-8 Key to Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
SECTION 7
Troubleshooting and Maintenance . . . . . . . . . . . . . . . . . . . . 247
7-1 Hardware Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
7-2 Responding to Displayed Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
7-3 Maintenance of the NT20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253
7-4 Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Appendices
A Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
B Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
C Transporting and Storing PTs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

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TABLE OF CONTENTS
D Making the Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
E Making the Cable for Connecting a Personal Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
F Model List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
G Option List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
H Special Characters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
I Function Restrictions Depending on the Support Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

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About this Manual:
This manual describes the basic functions and operation procedures of the NT-series programmable
terminal NT20, its operations when connected to a PLC or a Host, and includes the sections described
below.
Please read this manual carefully and be sure you understand the information provided before
attempting to install and operate the NT-series programmable terminal NT20.
!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.
Precautions provides general precautions for using the NT20 and related devices.
Section 1 describes the operation functions, system configuration, and the direct connection function
of the NT20.
Section 2 describes the NT20 hardware settings, its installation in an operation panel, its connection
to the Host, etc.
Section 3 describes the procedure before operating the NT20, and useful functions when operating it.
Also describes how to perform an operation check.
Section 4 describes the functions of the NT20 when it is connected to a Host.
Section 5 describes how to operate the NT20 when the host link/NT link is used for communications.
Section 6 describes how to operate the NT20 when the RS-232C interface is used for communica-
tions. Read this section only when using the NT20-ST128.
Section 7 describes the procedures to follow when the system does not operate correctly, and the pro-
cedure for routine maintenance of the NT20.
APPENDIX describes the specifications and the method for making connecting cables, and includes
an area list for the PLC.
!WARNING Failure to read and understand the information provided in this manual may result in per-
sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.