Comparison Between Nt20S And Nt21 - Omron NT21 - SETUP MANUAL 10-2001 Setup Manual

Comparison between NT20S and NT21

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Comparison between NT20S and NT21

Item
NT Support Tool used
Effective display area
Number of screen dots (resolution)
Number of touch switches
DIP switch settings
Use of Memory Unit
RS-232C interface
Backlight life
Replacement backlight
Battery backup
System program data
1:N NT Links
Memory Links
Number of user-registered screens
Screen data capacity*3
(User program memory)
Numeral and character string
memory tables
Bit memory table
Mathematical table
Image data
Library data
Fixed graphics (rectangles, poly-
gons, arcs, sectors, tiling)
Image library display
Analog meters
Trend graphs
Broken-line graphs
Alarm list/history
Recipes
Windows
Method for storing numeric values
(numeral memory data and PT Sta-
tus Control Area)
PT Status Control Area size
4
NT20S
NT-ZJCAT1-EV4 or NT-ZA3AT-EV2
112 x 56 mm (horizontal x vertical)
256 x 128 dots (horizontal x vertical)
12 x 6 dots (horizontal x vertical)
On rear of Unit
Not possible
Connector (9-pin) also used as port for
screen data transfer
10,000 h min.
NT20S-CFL01
Not possible
Pre-installed (cannot be changed)
Standard
Not possible*2
Maximum of 500
96 KB
Maximum of 128 entries
None
None
None
None
None
None
None
None
None
None
None
None
Fixed as BCD (binary coded decimal)
4 words
Section
NT21
NT-ZJCAT1-EV4.6
117 x 63 mm (horizontal x vertical)
260 x 140 dots (horizontal x vertical)
13 x 7 dots (horizontal x vertical)
None (software settings)
Possible (to transfer system program
data and screen data)
- Port A connector (also used for
screen data transfer, 9-pin)
- Port B connector (for host
communications only, 9-pin)
50,000 h min.
Not replaceable.
*1
Possible
(numeral/character string memory
tables, history data, recipe data, and
clock data)
The system installer and system pro-
gram data are transferred from the NT
Support Tool.
Standard or high-speed
Possible
Maximum of 3999
512 KB
Maximum of 2,000 entries
Maximum of 1000 bits
256 entries max.
Calculations can be executed
automatically in the PT.
Maximum of 4,095 (224 in
NT20S-compatible mode)
Maximum of 12,288 (896 in
NT20S-compatible mode)
65,535 per screen including all fixed
display elements
256 per screen max.
50 per screen max.
1 per screen max.
1 per screen max.
4 per screen max.
1 per screen max.
Maximum of 3
Selectable from BCD (binary coded
decimal) or binary
5 words (partial change of contents) (4
words in NT20S-compatible mode)
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