用scl编写3层电梯程序
时间: 2023-05-24 08:03:55 浏览: 141
A:
```scl
PROGRAM ELEVATOR
VAR
elevator1: ELEVATOR;
elevator2: ELEVATOR;
elevator3: ELEVATOR;
END_VAR
elevator1 := ELEVATOR(1, 10, 1);
elevator2 := ELEVATOR(1, 10, 1);
elevator3 := ELEVATOR(1, 10, 1);
WHILE TRUE DO
elevator1.move();
elevator2.move();
elevator3.move();
END_WHILE;
FUNCTION ELEVATOR(start, end, speed)
VAR
currentFloor: INT := start;
destinationFloor: INT;
direction: BOOL;
END_VAR
destinationFloor := currentFloor;
direction := TRUE;
IF currentFloor = start THEN
// set initial direction
IF end > start THEN
direction := TRUE; // up
ELSE
direction := FALSE; // down
END_IF;
END_IF;
// check for destination
IF currentFloor = destinationFloor THEN
IF currentFloor = start THEN
destinationFloor := end;
ELSEIF currentFloor = end THEN
destinationFloor := start;
ELSEIF direction THEN
destinationFloor := end;
ELSE
destinationFloor := start;
END_IF;
END_IF;
// move elevator
IF currentFloor < destinationFloor THEN
currentFloor := currentFloor + 1;
ELSIF currentFloor > destinationFloor THEN
currentFloor := currentFloor - 1;
END_IF;
// set new direction
IF currentFloor = end THEN
direction := FALSE; // down
ELSIF currentFloor = start THEN
direction := TRUE; // up
END_IF;
RETURN ELEVATOR;
END_FUNCTION
```
以上代码实现3台电梯运行,可以通过修改`ELEVATOR`函数的参数调整电梯的运行范围和速度。注:该代码未经过调试,仅供参考。