2-12
Section
Inputting Numeric Values
192
2. Each time a change is made to the numeric value it is confirmed and the oc-
currence of the change is notified to the host via the PT status notify area.
PT
Data writing
Numeral memory table
Notification
Host
1 2 3 4
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.
– – – –
1 2 3 4
+ + + +
Restrictions
•
A maximum of 64 thumbwheel type numeric input fields can be registered for
one screen without overlapping each other.
•
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 of elements are registered, check that
the restrictions on element display are complied with by referring to Display Re-
strictions (page 425).
•
It is not possible to set input from more than one numeral setting input field (nu-
meric key type or thumbwheel type) on the same screen to one numeral
memory table.
In cases where values at the host must be input both in decimal and hexadeci-
mal, set numeral input into separate numeral memory tables, both allocated to
the same area.
•
The range of numeric values that can be input depends on the Storage Type
(BCD or Binary) of the numeral memory table, and the Display Type (Decimal
or Hexadecimal), and Display Sign settings made for the numeral setting input
field. For details, refer to
2-3-1 Numeral Memory Tables (page 64).
•
It is not possible to register multiple input fields (regardless of the type of nu-
meric key or thumbwheel) which refer to the same numeral table entry on the
same screen.
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Summary of Contents for NT21 Series
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