Thumbwheel Type (Thumbwheel) - Omron NT21 Reference Manual

Inputting Numeric Values
Display Functions
Input Functions
Output Functions
Processing Functions
Relationship with Other Elements

2-12-2 Thumbwheel Type (Thumbwheel)

Function Outline
200
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 193).
Numeric values are input into numeral setting input fields by using the control
code input key touch switches.
When a numeral input field using the interlock function is being displayed on
the screen, the PT continuously reads the status of the corresponding interlock
bit allocated in the PC.
Numeral setting input fields only write input numeric values to numeral memory
table entries; they have no function for directly outputting data to external des-
tinations (if a value is written to a numeral memory table entry for which words
have been allocated in 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 193).
Numeral displays (page 140) use the same conversion method and display
method as numeral setting input fields.
For details on how numeric values are stored in numeral memory table entries,
refer to 2-3-1 Numeral Memory Table (page 72).
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 327).
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. How-
ever, the way in which they overlap can be changed with the Support Tool.
Thumbwheel type numeric input fields are input fields for inputting numeric val-
ues 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 table entries.
The values can be input either in decimal or hexadecimal format.
The thumbwheel switch functions as a numeral display when it is not receiving
inputs.
Section 2-12