博途1200/1500PLC气缸功能块

根据引用[1]所述，博途1200/1500PLC提供了气缸功能块(FB)，可以用于控制气动控制执行机构，如气缸。下面是一个简单的气缸功能块的例子：

FUNCTION_BLOCK FB_CYLINDER
TITLE = 'Cylinder Control Function Block'
VERSION : INT := 1;
AUTHOR : STRING(20) := 'Your Name';
FAMILY : STRING(20) := 'Cylinder Control';
DATE : DATE := DATE(2021, 10, 1);
(*
   Input Variables
*)
VAR_INPUT
    Cylinder_ON : BOOL; (* Control signal to turn on the cylinder *)
    Cylinder_OFF : BOOL; (* Control signal to turn off the cylinder *)
    Cylinder_Pos : INT; (* Desired position of the cylinder *)
END_VAR
(*
   Output Variables
*)
VAR_OUTPUT
    Cylinder_Status : BOOL; (* Status signal indicating whether the cylinder is on or off *)
    Cylinder_Actual_Pos : INT; (* Actual position of the cylinder *)
END_VAR
(*
   Internal Variables
*)
VAR
    Cylinder_Pos_Internal : INT; (* Internal variable to store the desired position of the cylinder *)
END_VAR
(*
   Implementation
*)
BEGIN
    (* Store the desired position of the cylinder in an internal variable *)
    Cylinder_Pos_Internal := Cylinder_Pos;
    (* Turn on the cylinder if the Cylinder_ON signal is true *)
    IF Cylinder_ON THEN
        Cylinder_Status := TRUE;
        Cylinder_Actual_Pos := Cylinder_Pos_Internal;
    END_IF;
    (* Turn off the cylinder if the Cylinder_OFF signal is true *)
    IF Cylinder_OFF THEN
        Cylinder_Status := FALSE;
        Cylinder_Actual_Pos := 0;
    END_IF;
END_FUNCTION_BLOCK

上述代码定义了一个名为`FB_CYLINDER`的气缸功能块，它有三个输入变量和两个输出变量。输入变量包括`Cylinder_ON`（控制气缸打开的信号）、`Cylinder_OFF`（控制气缸关闭的信号）和`Cylinder_Pos`（气缸的期望位置）。输出变量包括`Cylinder_Status`（指示气缸是否打开的信号）和`Cylinder_Actual_Pos`（气缸的实际位置）。