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; 
}