Omron NT21 - User Manual

Other manuals for Omron NT21

Setup Manual222 pages

Questions and Answers

R
Raymond SmithSep 12, 2025
Why are some set elements not displayed on overlapping screens of Omron Touch terminals?
- M
  Matthew DiazSep 12, 2025
  If some set elements are not displayed on overlapping screens, it is because the data is transmitted from the host in screen units, the number of elements on the overlapping screens has exceeded the maximum permissible without being checked by the Support Tool. Check the maximum number of elements, create the screen data again, then send all the screen data in a batch to the PT.
J
jonathanfranklinSep 12, 2025
Why can't I call up the System Menu on Omron NT21 Touch terminals?
- T
  Tammy JohnsonSep 12, 2025
  If the System Menu cannot be called up, it is possible that Display System Menu under Change System Settings in the System Installer mode is set to Disabled. In the System Installer mode, set Display System Menu to Enabled.
J
Jennifer TaylorSep 10, 2025
Why aren't some elements displayed on a normal screen of Omron NT21 Touch terminals?
- T
  Tonya JordanSep 12, 2025
  If some elements arranged on a normal screen are not displayed, it could be because the quantity of read data exceeds the stipulated restriction. Check the maximum number of elements, create the screen data again, then transmit all of the screen data in a batch to the PT.
M
Mrs. Carly WilsonSep 9, 2025
How to fix too faint display on Omron NT21?
- C
  carpentertimothySep 9, 2025
  If the display is too faint, the contrast may be too high. For the NT31/NT31C or NT631/NT631C, use the system menu to reduce the contrast. For the NT21, use the switches on the back of the PT to increase the contrast.
S
Sandra MejiaAug 23, 2025
Why can't I use the Programming Console function on Omron NT21 Touch terminals?
- A
  Amanda WarrenAug 23, 2025
  The Programming Console function may be unusable due to several reasons. First, the communication settings might be incorrect; ensure the communication method/communication port is set correctly (With C-series PC: 1:1 NT Link; With CS/CJ-series PC: 1:N NT Link). Second, a Programming Console might be connected; disconnect it, as it's not possible to use both simultaneously with all PCs except CS/CJ-series. Third, the PC may not support the Programming Console function; check your PC model's compatibility. Finally, the system program for other vendor’s PCs has been installed (PC models other than OMRON); install the correct system program for OMRON PCs.
R
robinstephensonSep 7, 2025
Why doesn't the trend graph display agree with the actual time axis on Omron NT21?
- R
  Robert HamptonSep 7, 2025
  The trend graph display may not agree with the actual time axis if the cycle for graph display update processing is longer than the set sampling cycle. To resolve this, delete other elements on the same screen as the trend graph that are allocated words in the host and have a high update frequency, or lengthen the sampling cycle.
B
Bobby ClarkSep 6, 2025
What causes the graph display not to change on Omron NT21?
- J
  Jon YorkSep 6, 2025
  If the graph display on your Omron Touch terminals is not changing, it is likely that one of the percentage display settings — –100%, 0%, or 100% — is incorrect. Ensure that these values are set in the following relationship: –100% value < 0% value < 100% value.
T
Tiffany HardingSep 4, 2025
Why doesn't the screen change when calling Device Monitor from the PPTT status control area on Omron NT21 Touch terminals?
- E
  Eddie BaldwinSep 5, 2025
  If the screen doesn’t change when the Device Monitor function is called from the PPTT status control area, the issue might be due to the communications protocol setting at the PT not being 1:1 NT Link or 1:N NT Link. Check the memory switches and set the connected PC’s serial port protocol to 1:1 NT Link or 1:N NT Link, and ensure the same protocol is set in the PC. Alternatively, the system program installed in the PT could be for a PC maker other than OMRON; the Device Monitor function only works when connected to an OMRON PC. Verify the system program type and ensure it’s an OMRON Direct Access system program with version 3. or higher.
B
Brady PorterSep 3, 2025
Why does the PC mode change to MONITOR mode on Omron NT21?
- A
  allisonlopezSep 4, 2025
  The PC mode changes to MONITOR mode because this is an Omron Touch terminals specification when host link communication is used. When using a PC that can also be connected using the NT link method, use an NT link connection as there is no mode change with the NT link method.
S
Steven PerrySep 2, 2025
Why can't I input numeric values on Omron NT21?
- K
  kimberly32Sep 2, 2025
  If you are unable to input numeric values on your Omron Touch terminals, it is likely that the upper/lower (max./min.) limit check for numeric value input is in effect. Check the screen data’s upper/lower (max./min.) limit check setting for numeric value input, and correct it if necessary.

Summary

SECTION 1 General

1-1 Role and Operation of the PT

Introduces the fundamental role and operation of Programmable Terminals (PTs).

1-2 Functions of the NT21, NT31;NT31 C and NT631;NT631 C

Details the features, comparisons, and principal functions of the NT series terminals.

1-3 System Configuration

Explains the system configuration and peripheral devices connectable to the PTs.

1-4 Communications with the Host

Covers various communication methods for connecting the PT to a host system.

1-5 Communication by Using Memory Links

Describes communication using memory links, a method other than direct connection.

1-6 Before Operating

Provides essential steps and considerations before operating the PT.

SECTION 2 PT Functions

2-1 PT Screens

Describes the PT screens which form the basis of PT functions.

2-2 Areas for Control;Notification

Explains the areas provided for PT control and status notification between PT and host.

2-3 Memory Tables

2-7 Touch Switches

Details input from the touch panel, allowing screen switching and bit information transmission.

2-8 Numeral Display

2-9 Character String Display

2-11 Alarm List, Alarm History

Explains monitoring host bits and displaying messages or image/library data when a bit changes to ON.

2-12 Inputting Numeric Values

Details the procedure for inputting numeric values using numeral input fields or thumbwheel switches.

2-13 Inputting Character Strings

Explains inputting character strings using touch switches or a bar code reader.

2-14 Recipes

Describes writing and reading data in table format to/from the host, allowing multiple settings to be managed.

2-15 Window Function

2-16 Special Functions

Covers display history, alarm history, resume, screen saver, buzzer, clock, print, contrast/brightness, programming console, and device monitor.

2-17 Device Monitor Function

Details the Device Monitor function for reading/changing PC data and displaying PC error logs.

2-18 Mathematical Function

2-19 PT Configuration Settings

SECTION 3 How to Use the PT

3-1 Screen Creation Procedure

3-2 Buzzer, Backlight, and Display Control

3-3 Screen Display and Notification

3-4 Display and Control of Windows

3-7 Input of Numeric Values and Character Strings

3-8 Using the Alarm List;History Function

3-9 Using the Display History Function

3-10 Display and Setting of Calendar Clock

3-11 Printing Data and Checking the Printer Status

3-12 Enabling;Disabling PT Operations

SECTION 4 Using Memory Link

4-1 Operation of the Memory Link

4-2 Outline of Communications

4-3 Commands;Responses

4-4 Memory Link Online Transfer Function

SECTION 6 Troubleshooting and Maintenance

6-1 Troubleshooting

Guides on actions to take when PT errors occur, by matching symptoms to remedies.

6-2 Responding to Displayed Error Messages

Details how to respond to various error messages displayed on the PT.

Appendix B Compatibility with Screen Data of Other PT Models

Appendix C NT20 S and NT30;620 Compatible Modes

Omron NT21 Specifications

General

Display Type	STN monochrome LCD
Display Size	5.7 inches
Resolution	320 x 240 pixels
Touch Panel	Analog resistive
Communication Ports	RS-232C, RS-422/485
Power Supply	24 VDC
Operating Temperature	0 to 50°C
Storage Temperature	-20 to 60°C
Weight	0.8 kg
Memory	512 KB