Omron NT21 Reference Manual page 344

Input of Numeric Values and Character Strings
Reference:
3. Press the ENT key of the input key – control or the
When the input is confirmed, the input numeric value is stored to a numeral
memory table entry. Then, the occurrence of a change in the contents of the
numeral memory table entry is notified to the host via the PT status notify
area (page 61).
S When a numeric value is confirmed the PT checks whether the value falls with-
in the specified upper and lower limit values. 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 display before starting the input. In this
case, neither writing to a numeral memory table entry nor notification to the
host is executed.
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. (Refer to page 451.)
Inputting Operation Using Touch Switches
A numeric value can be input in the same manner as when using an electronic
calculator by using the touch switch input key – control.
Initial Display
When a numeral setting input field is displayed, the contents of a numeral
memory table entry where the input numeric value is written are displayed.
Cursor Frame
If a Cursor frame is set for the numeral setting input field, the frame that encloses
the input field is displayed while the field is accepting input.
Inputting an Integer Part and a Decimal Fraction Part
In the integer part, numerals are input from the lowest digit position and the input
value is shifted to the left as new numerals are input. If the input value exceeds
the number of display digits of the integer part, the numeral at the highest digit
position is cleared.
After the input of a decimal point, the succeeding numeric input is regarded as a
decimal fraction. In the decimal fraction part, the numeral input first is displayed
in the first place. After that the input numerals are displayed to the right of the
preceding input. If the input value exceeds the display range, the numeral occu-
pying the first position to the right of the decimal point is cleared.
Key input Displayed numeric value
(Initial state)
9
0
.
4
5
Display of a Sign
If the numeral setting input field is assigned the signed value setting, the sign (+
and –) toggles each time the
Cursor frame
Input field
1234
1234.5678
0009.0000
0090.0000
0090.0000
0090.4000
0090.4500
key is pressed.
Section 3-7
key to confirm the input.
329