Horner APG QX751 OCS - Manual (Page 52)

CH.10 MAN0890-02-EN
August 20, 2009 Page 52 of 96 ECN # 979
Multiple objects are provided for displaying data such as virtual panel lights, push buttons, numeric value
displays, bar graphs, meters, graphs and animated bitmaps. On the QX, these graphical objects (through
ladder manipulation of attribute bits) can change color, flash or change visibility to attract operator
attention.
On objects that accept user input, the input is provided by touching the object or alternately changing an
OCS register (i.e. Function key registers). Objects that allow input generally have a raised 3D
appearance. An exception is the binary type objects, such as buttons, which are shown in a depressed
3D appearance when in the ON state. Objects that normally accept touch input may be disabled through
program control (through ladder manipulation of an attribute bit). If an object is disabled, the object’s
representation changes to a 2D appearance.
On objects that represent non-discrete information, more action may be required beyond that of simply
touching the object. For example, the slider object requires the operator to touch and slide the control in
the direction desired. Alternately, alpha-numeric entry objects invoke a pop-up alpha-numeric keypad for
additional user input. The alpha-numeric keypad is discussed below.
Note that if the numeric entry object displays >>>>>>>, the value is too big to display in the field or is
above the maximum for an editable field. Likewise, if the QX751numeric entry object displays <<<<<<<
in a numeric field, the value is too small to display or is below the minimum for an editable field.
10.3 Alpha-numeric
keypad
To allow entry of a specific number or text, several of the input objects invoke a pop-up alpha-numeric
keypad when the object is touched. An example of the alpha-numeric keypad invoked from a numeric
input object is shown in Figure 10.2. Once invoked, the operator may touch the appropriate keys to enter
a specific value. When entering a value, the alpha-numeric keypad is in one of two modes [new-value or
edit-value].
New-value mode
Generally, when the alpha-numeric keypad is first invoked, it is placed in new-value mode. Initially, the
alpha-numeric keypad displays the current value with all the digits being hi-lighted. Once the first digit is
entered, the current value is erased from the display and the new digit is placed in the first location.
Thereafter, no digits are hi-lighted and new digits are added to the rightmost position while the other digits
are shifted left.
Edit-value mode
Edit-value mode may be entered from the initial new-value mode by pressing either the left or right arrow
key before any digit key is pressed. The result will be a single character hi-lighted. The user may then
either touch a key to change the digit at the selected position or the up and down arrows may be used to
add or subtract (respectively) from the selected digit. The user may then use the left or right arrow keys
to select a new position.