Hỏi về vấn đề làm cho băng tải chuyển động trong WinCC ?

#include "apdefap.h"

int gscAction( void )
{
int cbmocua1;
int cbdongcua1;
int dtbt1;
int mocua;
int dongcua;
int dc1len;
int dc1xuong;
int dc1lentocdocham;
int dc1xuongtocdocham;
int vitrithang; 
int vitriDC_mocua1;
dtbt1=GetTop("2 thang.Pdl","DTBT1");	//Return-Type: long int 
mocua=GetTop("2 thang.Pdl","mo cua");	//Return-Type: long int 
dongcua=GetTop("2 thang.Pdl","Dong cua");	//Return-Type: long int 
vitrithang=GetTop("2 thang.Pdl","Cabin1");	//Return-Type: long int 
vitriDC_mocua1=GetTop("2 thang.Pdl","DC mocua1");	//Return-Type: long int 
cbdongcua1=GetTop("2 thang.Pdl","CBdong cua 1");	//Return-Type: long int 
cbmocua1=GetTop("2 thang.Pdl","CB mo cua 1");	//Return-Type: long int 

dc1len=GetTagBit("dc1len");	//Return-Type: BOOL 
dc1xuong=GetTagBit("dc1xuong");	//Return-Type: BOOL 
dc1lentocdocham=GetTagBit("dc1lentocdocham");	//Return-Type: BOOL 
dc1xuongtocdocham=GetTagBit("dc1xuongtocdocham");	//Return-Type: BOOL 
if(dc1lentocdocham==1)
{
	vitrithang = vitrithang-2;
	vitriDC_mocua1=vitriDC_mocua1-2;
	dtbt1=dtbt1-2;
	mocua=mocua-2;
	dongcua=dongcua-2;
	cbmocua1=cbmocua1-2;
	cbdongcua1=cbdongcua1-2;
}
else
{
	if(dc1len==1)
	{
		vitrithang=vitrithang-4;
		vitriDC_mocua1=vitriDC_mocua1-4;
		dtbt1=dtbt1-4;
		mocua=mocua-4;
		dongcua=dongcua-4;
		cbmocua1=cbmocua1-4;
		cbdongcua1=cbdongcua1-4;

	}
	else
	{
		if(dc1xuongtocdocham==1)
		{
			vitrithang=vitrithang+2;
			vitriDC_mocua1=vitriDC_mocua1+2;
			dtbt1=dtbt1+2;
			mocua=mocua+2;
			dongcua=dongcua+2;
			cbmocua1=cbmocua1+2;
			cbdongcua1=cbdongcua1+2;

		}
		else
		{
			if(dc1xuong==1)
				{
				vitrithang=vitrithang+4;
				vitriDC_mocua1=vitriDC_mocua1+4;
				dtbt1=dtbt1+4;
				mocua=mocua+4;
				dongcua=dongcua+4;
				cbmocua1=cbmocua1+4;
				cbdongcua1=cbdongcua1+4;

				}
			else
				{
				vitrithang=vitrithang;
				vitriDC_mocua1=vitriDC_mocua1;
				dtbt1=dtbt1;
				mocua=mocua;
				dongcua=dongcua;
				}
		}
	}
}
SetTop("2 thang.Pdl","Cabin1",vitrithang);	//Return-Type: BOOL 
SetTop("2 thang.Pdl","DC mocua1",vitriDC_mocua1);	//Return-Type: BOOL 
SetTop("2 thang.Pdl","Dong cua",dongcua);	//Return-Type: BOOL 
SetTop("2 thang.Pdl","DTBT1",dtbt1);	//Return-Type: BOOL 
SetTop("2 thang.Pdl","mo cua",mocua);	//Return-Type: BOOL 
SetTop("2 thang.Pdl","CBdong cua 1",cbdongcua1);	//Return-Type: BOOL 
SetTop("2 thang.Pdl","CB mo cua 1",cbmocua1);	//Return-Type: BOOL 

return 0; 
}