2 Visual Components Manuals

3.3.8.35.1 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.
OUT Return Value UINT Not equal to 0 if error occurs
Warning:
VA_Saccess cannot be called before the VA_StopProject function.
3.3.8.35.2 Example for Automation Basic
(* init program *)
ready = 0
(* 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
CASE selection OF
ACTION 1:
ENDACTION
Status = VA_StopProject(1,VC_HANDLE)
ACTION 2:
AccessStatus = VA_Saccess(1,VC_HANDLE)
IF AccessStatus = 0 THEN
VA_Line(1,VC_HANDLE, 10,10,100,100,1)
VA_Srelease(1,VC_HANDLE)
ENDIF
ENDACTION
ACTION 3:
ENDACTION
ELSEACTION :
ENDACTION
ENDCASE
ENDIF
selection = 0
3.3.8.35.3 Example for C Programming
#include
#include
#include
_GLOBAL UINT ready;
_GLOBAL USINT Type;
_GLOBAL UINT selection;
_GLOBAL UDINT Status;
_GLOBAL UDINT VC_HANDLE;
_GLOBAL UDINT AccessStatus;
_INIT void InitSp(void)
{
ready=0;
selection=0;
}
_CYCLIC void Cyclic(void)
{
Status = VA_StartProject(1,VC_HANDLE)
Introduction to Visual Components 2.3
170 3.3.8.35 Manual Project Control − VA_StopProject