2 Visual Components Manuals

Introduction to Visual Components 2.3
3.3.8.25.1 Parameter
I/O Parameter Type Meaning
IN enable BOOL This function is only executed if enable is TRUE.
IN VCHandle UDINT The handle returned by VA_Setup
IN percent UDINT
Brightness intensity
000 dark
500 standard
100 light
OUT Return Value UINT Not equal to 0 if error occurs
3.3.8.25.2 Example for Automation Basic
(* cyclic program *)
if ready 1 then
VC_HANDLE = VA_Setup(1 "vga") ,
if VC_HANDLE 0 then
ready = 1
endif
endif
if ready = 1 then
VA_Saccess(1,VC_HANDLE)= if
0 then
endif
3.3.8.25.3 Example for C Programming
#include
#include
#include
UINT _GLOBAL ready;
UDINT _GLOBAL percent;
unsigned long VC_HANDLE;
VA_SetBrightness(1,VC_HANDLE,percent)
VA_Srelease(1,VC_HANDLE)
endif
_CYCLIC void Cyclic(void)
{
if (!ready)
{
VC_HANDLE = VA_Setup(1 "vga"); ,
if (VC_HANDLE)
ready = 1;
}
if (ready)
{
if (!VA_Saccess(1,VC_HANDLE))
{
VA_SetBrightness(1,VC_HANDLE,percent);
VA_Srelease(1,VC_HANDLE);
}
}
}
3.3.8.26 Setting Contrast and Brightness − VA_SetContrast
PP contrast can be set with the VA_SetContrast function.
Note:
This function is only available on LCD Displays.
3.3.8.26.1 Parameter
I/O Parameter Type Meaning
IN enable BOOL This function is only executed if enable is TRUE.
3.3.8.25 Setting Contrast and Brightness − VA_SetBrightness 161