请教电梯控制系统设计中WINCC程序

开关门程序
int left1,left2;
left1=GetLeft(“模拟画面.PDL”,”矩形23”);
left2=GetLeft(“模拟画面.PDL”,”矩形24”);
static left1=220;
static left2=240;
static time=6s;
if (GetTagBit(“open_door”));
{
SetTagBit(“close_door_limit”,FALSE);
left1=left1-1;
if (left1=200)
{
SetTagBit(“open_door_limit”,TRUE);
 time=time-1;
 if (time=0)
 {
SetTagBit(“close_door”,TRUE);
  SetTagBit(“open_door_limit”,FALSE);
  left1=left+1;
  if (left1=220);
  SetTagBit(“close_door_limit”,TRUE);
 }
 else if ((time>0)&&(GetTagBit(“close_door_in”)))
 {
SetTagBit(“close_door”,TRUE);
  SetTagBit(“open_door_limit”,FALSE);
  left1=left+1;
  if (left1=220);
  SetTagBit(“close_door_limit”,TRUE);
 }
}
}
return left1;


if (GetTagBit(“open_door”));
{
SetTagBit(“close_door_limit”,FALSE);
Left2=left2+1;
if (left2=260)
{
SetTagBit(“open_door_limit”,TRUE);
 time=time-1;
 if (time=0)
 {
SetTagBit(“close_door”,TRUE);
  SetTagBit(“open_door_limit”,FALSE);
  Left2=left2-1;
  if (left2=240);
  SetTagBit(“close_door_limit”,TRUE);
 }
 else if ((time>0)&&(GetTagBit(“close_door_in”)))
 {
SetTagBit(“close_door”,TRUE);
  SetTagBit(“open_door_limit”,FALSE);
  Left2=left2-1;
  if (left2=240);
  SetTagBit(“close_door_limit”,TRUE);
 }
}
}
return left2;
这是我自己编的,错误很多,请高手来指教