Omron NT21 User Manual

Appendix BCompatibility with Screen Data of Other PT Models
436
Differences between the NT20S and the NT21
This section explains the differences in screen creation and programming between the NT20S and the NT21.
Refer to 1-2 Functions of the NT21, NT31/NT31C, and NT631/NT631C for details on functional differences be-
tween the PT models (page 4).
Reference: The NT20S compatible mode can be used to reduce the differences with the
NT20S and allow their screen data and user programs to be reused easily. Refer
to Appendix C for details (page 451).
Item NT20S NT21
Fore-
ground/
back-
ground
relation-
ships in
screen
drawing
Display Element Type
Contents of display elements that have data
Fixed displays (text, marks)
Lamps (normal lamp frames)
Touch switches
Frames of bar graphs
Input settings
(numeral, thumbwheel)
Fixed displays (figures)
Screen background
Foreground
Background
Display Element Type
Image/that lamps
Recipe
Alarm list/history frames
Temporary input
Character string input
Thumbwheel type input
Numeral input
Trend graphs
Broken line graphs
Analogue meter
Frames of bar graphs
Numeral displays
Character string displays
Fixed displays
Lamp displays
Touch switches
Image/library data
Screen background
Foreground
Background
PT status
control
area
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word n
Word n+1
Word n+2
Word n+3
Screen number (4 BCD digits)
Copy type
PT status control bits 0 0
0
Copy source memory table entry No. (3 BCD digits)
Copy destination memory table entry No. (3 BCD digits)
Bit
Word
Word n+4
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word n
Word n+1
Word n+2
Word n+3
Bit
Word
Screen number (4 BCD or hexadecimal digits)
Copy source memory table entry No. (4 BCD or hexadecimal digits)
Copy destination memory table entry No. (4 BCD or hexadecimal digits)
PT status control bits
Reserved for system use
PT status control bits
Word Controlled Item 1 (ON) 0 (OFF)
15 Screen display Performed Not performed
14
Processing priority registration Registered Canceled
13 Continuous buzzer Sounded Stopped
12 Intermittent buzzer Sounded Stopped
11 Not used Always 0
10 Not used Always 0
9 Not used Always 0
8 Backlight mode Lit Flashing
Reflected in word unit
PT status control bits
Word Controlled Item 1 (ON) 0 (OFF)
15 Screen display Performed Not performed
14
Processing priority registration Registered Canceled
13 Continuous buzzer Sounded Stopped
12 Intermittent buzzer (short) Sounded Stopped
11 Display history initialization Performed Not performed
10 Not used Always 0
9 Intermittent buzzer (long) Sounded Stopped
8 Backlight mode Lit Flashing
7 Not used Always 0
6 PT window opening Disabled Enabled
5
Numeral/character string input Disabled Enabled
4 PT screen switching Disabled Enabled
3 Memory table copy execution Performed Not performed
2 Memory table copy type Numeral Character string
1 Alarm history initialization Performed Not performed
0 Not used Always 0
Reflected in bit unit

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English