Omron NT21 Reference Manual page 349

Input of Numeric Values and Character Strings
Reference:
Inputting Numeric Values Using the Input Key – Control in a Window
Setting
334
S If the objective input field is shifted before confirming the input, the input nu-
meric value is canceled and the screen returns to the one displayed before the
numeric value was input.
S When a numeric input is confirmed, the PT checks whether the input is within
the upper and lower (max./min.) limits set for that numeral setting input field. If
the numeric value is outside the specified range, the buzzer sounds three
times, the input numeric value is canceled, and the screen returns to the dis-
play before starting the input. In this case, neither writing to a numeral memory
table entry nor notification to the host is executed.
S If the
key is pressed to confirm the input, the same field remains as the objec-
tive input field even after the previous input has been confirmed. If the ENT key
is used for the confirmation of the input, the next objective input field is se-
lected.
S When NT20S or NT30/620 compatible mode is being used, the current screen
number occupies the first word of the PT status notify area and the words con-
taining the updated memory table entry number and PT status notify bits are
shifted down one word.
The following describes the procedure for inputting a numeric value into a nu-
meral setting input field in the base screen using the input key – control regis-
tered for the window.
Here, the basic method for inputting numeric values is not explained: the ex-
planation concentrates on how the input key – control in a window should be
handled. For the numeric value input procedure and the procedure for specify-
ing the numeral setting input field, refer to the explanation for the numeric value
input method given previously.
When creating a screen using the Support Tool, register the following elements
for the screen.
Numeral setting input field (numeric key type)
Window open key touch switch
Specify the window screen number of the window used for inputting a numeric
value.
(Used when opening the window for inputting a numeric value. This operation
is not necessary if the window open function is set for the cursor moving key.)
Create the window screen used for the input and register the following elements
for it. (It isn't necessary to register all of the elements listed below. Register just
the required elements in the main screen and window.)
Touch switch input key – control
0 to 9
A to F (only for the numeral setting input field of the hexadecimal display
format)

(necessary for inputting a negative value)
. (necessary for inputting a decimal fraction)
12345678
7 8 9
4 5 6
1 2 3
Input
0 .
Window
Section 3-7