2 Visual Components Manuals

Introduction to Visual Components 2.3
Texts are output from an array of string variables if the second setting, String Array, is selected. These texts can
be composed in the control application during runtime and then output dynamically. Each line corresponds to a
string from the array of strings. It should be noted that a string is an array by default. Therefore, an array of
arrays must be created for this process variable.
In contrast to the Text Group setting, switching languages between the text layers defined in Visual Components
cannot be applied (since texts are only made available during runtime from the PLC program and are therefore
not recognized by the Visual Components editor). Language switching must be disabled by the control
application if necessary.
4.6.4.2.3 Variables
The Selected Item setting selects the highlighted line from the list. The list is always automatically advanced so
that the element is visible.
4.6.4.2.4 Colors
In addition to color settings for Advanced Text, the color of the highlighted line in the ListBox also has to be set.
4.6.4.3 Bitmap Graphic
This output field uses bitmaps to represent a dynamically changing status. For this, a process variable from the
PLC program can be used to switch between up to 255 different bitmaps. The upper−left corner of the bitmap is
always located at the specified position of the bitmap output field.
The background is not cleared when bitmaps are switched. Instead, only the new bitmap is output. Therefore, all
bitmaps should be the same size so that the rest of the previous bitmap does not remain on the display when it
is switched.
At the moment, bitmap output is only possible on IPC target systems (in color or black/white depending on the
display) or the PP41 PowerPanel. Displays used by the C130 CAN controller do not support bitmap output
fields.
The following settings can be defined for the bitmap field under the 'Parameter' tab:
4.6.4.2 ListBox 335