Omron NT21 Reference Manual page 449

Compatibility with Screen Data of Other PT Models
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
Item
Fore-
Display
ground/
back-
Foreground
Contents of display elements that have data
ground
Fixed displays (text, marks)
relation-
Lamps (normal lamp frames)
ships in
Touch switches
screen
Frames of bar graphs
drawing
Input settings
(numeral, thumbwheel)
Fixed displays (figures)
Background
Screen background
PT status
control
15 14 13
Word
area
Word n
Word n+1 0
Word n+2 Copy type
Word n+3 PT status control bits
PT status control bits
Word Controlled Item
15 Screen display
14
Processing priority registration
13 Continuous buzzer
12 Intermittent buzzer
11 Not used
10 Not used
9 Not used
8 Backlight mode
Reflected in word unit
436
NT20S and allow their screen data and user programs to be reused easily. Refer
to Appendix C for details (page 451).
NT20S
Element Type
Bit
12 11 10 9 8 7 6 5 4 3
Screen number (4 BCD digits)
Copy source memory table entry No. (3 BCD digits)
Copy destination memory table entry No. (3 BCD digits)
0
1 (ON)
Performed
Registered
Sounded
Sounded
Always 0
Always 0
Always 0
Lit
Display
Foreground
Background
2 1 0 15 14 13
Word
Word n
Copy source memory table entry No. (4 BCD or hexadecimal digits)
Word n+1
Word n+2 Copy destination memory table entry No. (4 BCD or hexadecimal digits)
0 Word n+3
Word n+4
PT status control bits
0 (OFF) Word Controlled Item
15 Screen display
Not performed
Canceled 14
Processing priority registration
Stopped 13 Continuous buzzer
Stopped 12 Intermittent buzzer (short)
11 Display history initialization
10 Not used
9 Intermittent buzzer (long)
8 Backlight mode
Flashing
7 Not used
6 PT window opening
5
Numeral/character string input
4 PT screen switching
3 Memory table copy execution Performed
2 Memory table copy type
1 Alarm history initialization
0 Not used
Reflected in bit unit
Appendix B
NT21
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
Bit
12 11 10 9 8 7 6 5 4 3
Screen number (4 BCD or hexadecimal digits)
PT status control bits
Reserved for system use
1 (ON)
Performed
Registered
Sounded
Sounded
Performed
Always 0
Sounded
Lit
Always 0
Disabled
Disabled
Disabled
Numeral
Performed
Always 0
2 1 0
0 (OFF)
Not performed
Canceled
Stopped
Stopped
Not performed
Stopped
Flashing
Enabled
Enabled
Enabled
Not performed
Character string
Not performed