Omron NT21 User Manual

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C
8
Item NT21NT20S
Bit memory table None Maximum of 1,000 bits
Mathematical table None 256 entries max.
Calculations can be executed
automatically in the PT.
Image data None Maximum of 4,095 (224 for compatibili-
ty with NT20S)
Library data None Maximum of 12,288 (896 for compati-
bility with NT20S)
Graphic figures (rectangles, poly-
gons, circles/ovals, sectors, filling)
None 65,535 total per screen, including other
fixed objects
Image library displays None 256 per screen max.
Analog meters None 50 per screen max.
Trend graphs None 1 per screen max.
Broken-line graphs None 1 per screen max.
Alarm lists/history None 4 per screen max.
Recipe function None 1 per screen max.
Windows None 3 per max.
Method for storing numeric values
(numeral memory data and PT Sta-
tus Control Area)
BCD (binary-coded decimal) BCD (binary-coded decimal) or binary
PT Status Control Area size 4 words 5 words (partial change of contents)
(4 words for compatibility with NT20S)
PT Status Notify Area size 3 words 2 words (partial change of contents)
(3 words for compatibility with NT20S)
Window Control Area size None 9 words
Clock Data Area size None 4 words
Registering continuous screens Possible Not possible (Use screen switches as
a substitute.)
System tenkey Possible Not possible (Use normal tenkey as a
substitute.)
Lamp/Touch switch labels Fixed display (1 line only) - Multiple lines can be displayed
- ON/OFF switching is possible
- Numeral display is possible
- Character string display is possible
Interlock function None 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.
Programming Console function Not possible. Possible.
Bar code reader connection Not possible. Possible.
High-quality font display Not possible. Possible.
Character codes CP437 (DOS) CP437 (DOS) or ISO8859/1 (Win-
dows)
Accessible CS/CJ PC data Areas --- The data areas listed below can be
accessed in addition to the data areas
accessible with the NT20S.
*4
- EM banks (EM_0 to EM_C)
- Timer Completion Flags (TU)
- Counter Completion Flags (CU)
- Work Areas (WR)
- Task Flags (TK)
- HR Area (HR)

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English