Omron NT21 User Manual

3-4SectionDisplay and Control of Windows
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3-4 Display and Control of Windows
A window means a partial screen that can be displayed on the presently dis-
played screen (base screen).
A window can be created by registering a screen under a screen number from 1
to 3999 as a window screen.
This section describes the following types of operation that can be performed for
a window.
• Opening/closing/moving a window
• Checking the display status of a window
• Disabling/enabling the opening of a window
Reference:  Window screen is called window/keyboard screen at the Support Tool.
 Window has the following two types.
Global window:
Local window:
3-4-1 Opening/Closing/Moving a Window
The PT provides the following methods to open/close/move a window.
• Pressing a touch switch that has the input key-window/keyboard function.
(Opening/closing are possible)
• Pressing a touch switch that has the cursor moving key function. (window
opening only)
• Pressing a touch switch that has the window moving key function. (window
moving only)
• Controlling the window by the operation of the window control area from the
host (Window opening/closing/moving are possible)
• Setting Load Local 1 (Keyboard), Load Local 2 screen attribute for a standard
screen and perform screen switch. (window opening only)
Reference:  If 1 (disable) is set for the window opening PT status control bit, it is not pos-
sible to open a window by operation at the PT. (Closing of a window is al-
lowed.)
 Touch switch operation will be disabled when the touch switch interlock func-
tion is being used and the host’s interlock bit that controls the touch switch’s
operation is OFF. (See Disabling Touch Switches with Interlock Bits on page
368 for details.)
 If the window for which open is specified is not a window screen, the window
open command is disregarded.
 When creating a screen with the Support Tool, it is possible to designate a win-
dow that is opened at the same time the screen is displayed (set with the Load
Window/Keyboard Screen attribute of Screen Property).

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

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/NT31C and NT631/NT631C

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 NT20S and NT30/620 Compatible Modes