1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C
12
Differences between the NT620S/NT620C/NT625C and NT631/NT631C
Item NT620S/NT620C/NT625C NT631/NT631C
Compatible Support Tool(s) NT-ZJCAT1-EV4 or
NT-ZA3AT-EV2
NT-ZJCAT1-EV4
DIP switch settings On rear of unit None (software settings)
Use of Memory Unit Not possible Possible
RS-232C interface Connector (9-pin) also used as port for
screen data transfer.
- Serial port A connector (also used
for screen data transfer, 9-pin)
- Serial port B connector (for host
communications only, 25-pin)
RS-422A/485 interface NT620S/NT620C: None
NT625C: Terminal block (Select
RS-232C or RS-422A/485 with the DIP
switch.)
Terminal block (A memory switch can
set the RS-232C connector as serial
port B.)
Replacement backlight NT620C-CFL01 (NT620C)
NT610C-CFL02 (NT625C)
NT631C-CFL01 (for ST151)
(The user cannot replace the
backlight for the
NT631C-ST152-EV2, and
NT631C-ST153-V3.)
NT631C-CFL02 (for ST141)
NT631/NT631C system program
data
NT620-ZS3PC/ZS3DV-EV1
(including system installer)
The system installer and system
program data are supplied with the
Support Tool.
High-speed 1:N NT Link Not possible Possible
Memory
System program Exclusive use by Memory Link Same as OMRON connection
Link
Screen data Shared with OMRON connection Exclusive use by Memory Link
LCD contrast adjustment By a control on the rear of the unit Adjustable with touch panel operation.
(NT631-ST141-V2 only)
Backlight brightness adjustment Not possible Adjustable with touch panel operation.
(NT631-ST141-V2 only)
Number of user-registered screens 2,000 max. 3,999 max.
Screen data capacity
*1
(User program memory)
NT620S: 512 KB
NT620C/NT625C: 1 MB
1 MB
Numeral string data 1,000 max. 2,000 max.
Character string data 1,000 max. 2,000 max.
Bit data 256 1,000 max.
Mathematical table None 256 entries max.
Calculations can be executed
automatically in the PT.
Image data 224 max. 4,095 max.
*2
Library data 896 max. 12,288 max.
*2
Method for storing numeric values
(numeral memory data and PT
status control area)
Fixed as BCD (binary coded decimal) Selectable from BCD (binary coded
decimal) or binary
PT status control area size 4 words 5 words (partial change of contents)
*2
PT status notify area size 3 words 2 words (partial change of contents)
*2
Window control area size None 9 words
Registering continuous screen Possible Not possible (Use a screen switchover
as a substitute.)
Lamp/Touch switch guide
characters
Fixed display (1 line only) - Multiple lines can be displayed
- ON/OFF switching is possible
- Numeral display is possible
- Character string display is possible
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