Creating Numeric Keys - Omron NT20S-ST121B-EV3 User Manual

Numeral Setting
Thumbwheel Type (Direct Connection Only)
4-8-3

Creating Numeric Keys

Setting Screen Attributes
158
When using an NT20 with a direct connection, numerical values are input
directly at the numeral setting input field using touch switches that increment
or decrement each of the digits in the display when pressed. Each time the
displayed numerical value is changed, the new displayed value is written to
the numeral memory table and the host is simultaneously notified.
This means that, when using the Thumbwheel type of numeral setting, all that
is required to input numerical values is to create the numeral setting input field
on the screen.
Pressing the [−] key
decrements the digit by one. NT20
1 2 3 4
Pressing the [+] key
increments the digit by one.
In order to input numerical values using the numeral setting function, apart
from the display area for the numeral setting, the numeric keys must also be
created.
The type of numeric keys can be selected using the numeral setting attributes
of the screen attributes. There are two numeral setting attributes: "system"
and "user".
• Screen When "System" Is Specified
When a numeral setting area is created, numeric keys are automatically
displayed. The display position and arrangement of the numeric keys are
fixed. On this screen, only the types of numeric key shown in the figure be-
low (system keys) are used.
Tank A Tank B Tank C
1 2 3 4
7 8 9 0
When using the NT20 with the numeral setting attribute set to "system",
apart from the numeric keys provided by the system, the touch switches
allocated to system keys (
function). To enable input of hexadecimal values, it is also necessary to
create numeric keys A through F.
With the NT20, if the numeral setting attribute is set to "system", apart from
the numeric keys prepared by the system, the touch switches allocated to
system keys ( ,
Functions on page 154.)
• When the Numeral Setting Attribute Is "User"
Notification
Write
1 2 3 4
Numeral
memory table
Each time a [+] or [−] key is pressed, the input
value is written to the numeral memory table
and the host is simultaneously notified.
5 6
±
CLR
, , ) also have to be created (system key
, ) have to be created. (Refer to 4-7-3 System Key
Section 4-8
Host