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Inputting Numeric Values
Section 7-12
7-12-2 Thumbwheel Type (“Thumbwheel”)
[Function Outline]
Thumbwheel type numeric input fields are input fields for inputting numeric values
on the screen.
Touch switches are provided to increment or decrement each digit of a numeric
value, making it easy to change numeric values and to write them to numeral
memory tables.
The values can be input either in decimal or hexadecimal format.
S Outline of operation
The basic operation of a thumbwheel type numeral setting input field is shown
below.
(1) The value in the numeral setting input field is changed using the increment-
ing and decrementing (+,
$
) touch switches.
++++
NT31/NT31C
Press the [
$
] key to decrement the digit.
Press the [+] key to increment the digit.
$$$$
1234
(2) Each time a change is made to the numeric value it is confirmed and the
occurrenceof the changeis notified to the host viathe PT status notify area.
++++
NT31/NT31C
$$$$
1234
Data writing
Numeral memory table
Notification
Host
1234
Each time a [+] or [
$
] key is pressed, the input value is written
to the numeral memory table and the change is notified to the
host at the same time.
[Restrictions]
S A maximum of 64 thumbwheel type numeric input fields can be registered for
one screen without overlapping each other.
S A maximum combined total of 256 of the following elements can be registered
for one screen. Even in the case of an overlapping screen with eight child
screens, it is only possible to register numeral setting input fields on one of the
child screens.
Numeral setting input field (numeric key type)
Numeral setting input field (thumbwheel type)
There is no restriction on the number of input fields that can be registered for one
screen data file: any number can be registered as long as the data file capacity is
not exceeded. However, if a large number ofelements areregistered, checkthat
the restrictions on element display are complied with by referring to “Display Re-
strictions” (page 644).
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