Omron NT21 User Manual

4-3SectionCommands/Responses
388
Response
Only if Yes is set for the Response memory switch, the response indicated below
is returned on normal completion.
Format
1B 43
[ESC] [CR]C
3130 31 0D53
S
30
0 0 s1 s2
s
1
, s
2
: Checksum (2 hexadecimal digits)
This is always added (fixed as 11H).
Function
• Writes 40 characters of space code (20H) to all the character string memory
table entries within the specified range.
• If settings are omitted for both the first cleared character string memory table
entry number and the final cleared character string memory table entry num-
ber, all the character string memory table entries are cleared. It is not possible
to omit just one of these settings.
4-3-14 Bit Memory Table Clear Command (Sent from Host to PT)
Command
Format
m
1B 43
[ESC]
C
(e3)
(b3)
(e4)
42
B (b1) (b2)
0D
(b4)
(e1) (e2)
(s1) (s2) [CR]
* * * * * * * * * *
* * * * * * * * * * * *
m: Checksum present/absent (1 BCD digit)
0: Absent
1: Present
b
1
to b
4
: First cleared bit memory table entry number (4 BCD digits)
0000 to 0999
e
1
to e
4
: Final cleared bit memory table entry number (4 BCD digits)
0000 to 0999
s
1
, s
2
: Checksum (2 hexadecimal digits)
When m is 0, omit this setting.
Reference: The maximum number that can be specified for bit memory table entries de-
pends on the setting for numbers of bit memory table entries (256/1000) made at
the Support Tool.
Response
Only if Yes is set for the Response memory switch, the response indicated below
is returned on normal completion.
Format
1B 43
[ESC] [CR]C
3030 30 0D42
B
30
0 0 s1 s2
s
1
, s
2
: Checksum (2 hexadecimal digits)
This is always added (fixed as 00H).
Writes OFF (0) to all the bit memory table entries within the specified range.Function

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