Omron NT31 Operation Manuals page 435

Inputting Numeric Values
Notice
[Display Functions]
[Input Functions]
[Output Functions]
[Processing Functions]
[Relationship with Other Elements]
424
S Upper/lower (max./min.) limit check
The NT31/NT31C has a function to check the correctness of an input numeric
value to prevent a numeric value outside the allowable range from being input so
that the input of an illegal value will not adversely affect the system.
For a numeric key type numeral setting input field, the check is executed when
an attempt is made to confirm a numeric value. If the value is higher than the
upper limit or lower than the lower limit, the buzzer sounds three times and the
input value is cleared (the status returns to that before input was attempted).
When the numeral values entered are confirmed, upper/lower limits are checked.
Numeric values are displayed in the numeral setting input field in accordance with
the "General" settings.
For details on the method of display according to the "General" settings, refer to
"Common Attributes" (page 419).
Numeric values are input into numeral setting input fields by using the "control
code input key" touch switches.
Numeral setting input fields only write input numeric values to numeral memory
tables; they have no function for directly outputting data to external destinations (if
the numeral memory table to which the numeric value is written is allocated to the
host, the data can be output to the host indirectly).
However, the input of a numeric value is notified to the host via the PT status notify
area.
With numeral setting input fields, input numeric values are converted to signed
binary data in accordance with the "Settings" property.
For details on the method of conversion depending on the "Settings" property, re-
fer to "Common Attributes" (page 419).
S "Numeral displays" (page 357) use the same conversion method and display
method as numeral setting input fields.
S For details on how numeric values are stored in numeral memory tables, refer to
7-3-1 "Numeral Memory Tables" (page 284).
S Input and confirmation touch switches are required in order to use numeral set-
ting input fields. In cases where there are multiple numeral setting input fields, it
is also possible to select and move between input fields using touch switches
(page 518).
S Numeral setting input fields overlap with other elements in accordance with the
order in which they were registered for the screen with the Support Tool. Howev-
er, the way in which they overlap can be changed with the Support Tool.
Section 7-12