Omron NT21 Reference Manual page 24

Functions of the NT21, NT31/NT31C and NT631/NT631C
Item
Bit memory table
Mathematical table
Image data
Library data
Graphic figures (rectangles, poly-
gons, circles/ovals, sectors, filling)
Image library displays
Analog meters
Trend graphs
Broken-line graphs
Alarm lists/history
Recipe function
Windows
Method for storing numeric values
(numeral memory data and PT Sta-
tus Control Area)
PT Status Control Area size
PT Status Notify Area size
Window Control Area size
Clock Data Area size
Registering continuous screens
System tenkey
Lamp/Touch switch labels
Interlock function
Programming Console function
Bar code reader connection
High-quality font display
Character codes
Accessible CS/CJ PC data Areas
8
NT20S
None
None
None
None
None
None
None
None
None
None
None
None
BCD (binary-coded decimal)
4 words
3 words
None
None
Possible
Possible
Fixed display (1 line only)
None
Not possible.
Not possible.
Not possible.
CP437 (DOS)
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Section
NT21
Maximum of 1,000 bits
256 entries max.
Calculations can be executed
automatically in the PT.
Maximum of 4,095 (224 for compatibili-
ty with NT20S)
Maximum of 12,288 (896 for compati-
bility with NT20S)
65,535 total per screen, including other
fixed objects
256 per screen max.
50 per screen max.
1 per screen max.
1 per screen max.
4 per screen max.
1 per screen max.
3 per max.
BCD (binary-coded decimal) or binary
5 words (partial change of contents)
(4 words for compatibility with NT20S)
2 words (partial change of contents)
(3 words for compatibility with NT20S)
9 words
4 words
Not possible (Use screen switches as
a substitute.)
Not possible (Use normal tenkey as a
substitute.)
- Multiple lines can be displayed
- ON/OFF switching is possible
- Numeral display is possible
- Character string display is possible
Operations can be disabled from the
PC by allocating interlock bits to the
corresponding touch switch, numeral
input, character string input,
thumbwheel switches, or recipe
objects.
Possible.
Possible.
Possible.
CP437 (DOS) or ISO8859/1 (Win-
dows)
The data areas listed below can be
accessed in addition to the data areas
accessible with the NT20S.
- EM banks (EM_0 to EM_C)
- Timer Completion Flags (TU)
- Counter Completion Flags (CU)
- Work Areas (WR)
- Task Flags (TK)
- HR Area (HR)
1-2
*4