Omron NT21 Reference Manual page 28

Functions of the NT21, NT31/NT31C and NT631/NT631C
Differences between the NT620S/NT620C/NT625C and NT631/NT631C
Item
Compatible Support Tool(s)
DIP switch settings
Use of Memory Unit
RS-232C interface
RS-422A/485 interface
Replacement backlight
NT631/NT631C system program
data
High-speed 1:N NT Link
Memory y System program
Link Li k
Screen data
LCD contrast adjustment
Backlight brightness adjustment
Number of user-registered screens
*1
Screen data capacity
(User program memory)
Numeral string data
Character string data
Bit data
Mathematical table
Image data
Library data
Method for storing numeric values
(numeral memory data and PT
status control area)
PT status control area size
PT status notify area size
Window control area size
Registering continuous screen
Lamp/Touch switch guide
characters
12
NT620S/NT620C/NT625C
NT-ZJCAT1-EV4 or
NT-ZA3AT-EV2
On rear of unit
Not possible
Connector (9-pin) also used as port for
screen data transfer.
NT620S/NT620C: None
NT625C: Terminal block (Select
RS-232C or RS-422A/485 with the DIP
switch.)
NT620C-CFL01 (NT620C)
NT610C-CFL02 (NT625C)
NT620-ZS3PC/ZS3DV-EV1
(including system installer)
Not possible
Exclusive use by Memory Link
Shared with OMRON connection
By a control on the rear of the unit
Not possible
2,000 max.
NT620S: 512 KB
NT620C/NT625C: 1 MB
1,000 max.
1,000 max.
256
None
224 max.
896 max.
Fixed as BCD (binary coded decimal)
4 words
3 words
None
Possible
Fixed display (1 line only)
Section
NT631/NT631C
NT-ZJCAT1-EV4
None (software settings)
Possible
- Serial port A connector (also used
for screen data transfer, 9-pin)
- Serial port B connector (for host
communications only, 25-pin)
Terminal block (A memory switch can
set the RS-232C connector as serial
port B.)
NT631C-CFL01 (for ST151)
(The user cannot replace the
backlight for the
NT631C-ST152j-EV2, and
NT631C-ST153j-V3.)
NT631C-CFL02 (for ST141)
The system installer and system
program data are supplied with the
Support Tool.
Possible
Same as OMRON connection
Exclusive use by Memory Link
Adjustable with touch panel operation.
(NT631-ST141j-V2 only)
Adjustable with touch panel operation.
(NT631-ST141j-V2 only)
3,999 max.
1 MB
2,000 max.
2,000 max.
1,000 max.
256 entries max.
Calculations can be executed
automatically in the PT.
*2
4,095 max.
*2
12,288 max.
Selectable from BCD (binary coded
decimal) or binary
5 words (partial change of contents)
2 words (partial change of contents)
9 words
Not possible (Use a screen switchover
as a substitute.)
- Multiple lines can be displayed
- ON/OFF switching is possible
- Numeral display is possible
- Character string display is possible
1-2
*2
*2