请问这个SCL程序怎么转换为精致面板上的VB程序？

2017年5月28日上午1:24 • SIMATIC S7-1500

这是CPU上的SCL源程序，我模仿着写在TP1200里的VB里。但是不知道怎么写？
1.为什么Y3、Y4、Y5等变量定义不了了呢？是不是要在脚本-常规-设置-参数里申明的，请教截图？
2.ByVal和ByRef有什么区别？
程序如下：

FUNCTION_BLOCK Fung_1V_5

VAR_INPUT
In:    REAL ;//   retain    in
ZUIDU_INPUT :  REAL;//RETAIN IN
X1:    REAL ;//   retain    in
X2:    REAL ;//   retain    in
X3:    REAL  ; // retain    in
X4:    REAL ; //  retain    in
X5:    REAL ; //  retain    in
//X6:    REAL ; //  retain    in
//X7:    REAL ; //  retain    in
Y1:    REAL ; //  retain    in
Y2:    REAL ; //  retain    in
Y3:    REAL ; //  retain    in
Y4:    REAL ; //  retain    in
Y5:    REAL ; //  retain    in
//Y6:    REAL ; //  retain    in
//Y7:    REAL ; //  retain    in
END_VAR
VAR_OUTPUT
    Out:    REAL ; //  retain    out
    Error:    BOOL; //   retain    out    0
END_VAR

VAR
     K1:  REAL;
     K2:  REAL;
     K3:  REAL;
     K4:  REAL;
     K5:  REAL;

END_VAR
   BEGIN

    K1:= 1-(ZUIDU_INPUT*Y1)/100;
    K2:= 1-(ZUIDU_INPUT*Y2)/100;
    K3:= 1-(ZUIDU_INPUT*Y3)/100;
    K4:= 1-(ZUIDU_INPUT*Y4)/100;
    K5:= 1-(ZUIDU_INPUT*Y5)/100;
   IF In >= X1 AND In < X2 THEN
   Out := K1 + (In - X1) * (K2 - K1)/(X2 - X1);
ELSIF In >= X2 and In < X3 THEN
   Out := K2 + (In - X2) * (K3 - K2)/(X3 - X2);
ELSIF In >= X3 and In < X4 THEN
   Out := K3 + (In - X3) * (K4 - K3)/(X4 - X3);
ELSIF In >= X4 and In < X5 THEN
   Out := K4 + (In - X4) * (K5 - K4)/(X5 - X4);
//ELSIF In >= X5 AND In < X6 THEN
  // Out := Y5 + (In - X5) * (Y6 - Y5)/(X6 - X5);
//ELSIF In >= X6 AND In < X7 THEN
   //Out := Y6 + (In - X6) * (Y7 - Y6)/(X7 - X6);
ELSIF In >= X5  THEN
      Out := K5;
      Error := True;
   ELSIF In < X1 THEN
      Out := K1;
      Error := True;
   ELSE
      Error := False;
   END_IF;
END_IF;
END_FUNCTION_BLOCK

图片说明：

最佳答案

首先:SCL源码多了一个END_IF;

VBS代码
    Dim In0, ZUIDU_INPUT, X1, X2, X3, X4, X5, Y1, Y2, Y3, Y4, Y5, K1, K2, K3, K4, K5, Error0, Out
    K1 = 1 - (ZUIDU_INPUT * Y1) / 100
    K2 = 1 - (ZUIDU_INPUT * Y2) / 100
    K3 = 1 - (ZUIDU_INPUT * Y3) / 100
    K4 = 1 - (ZUIDU_INPUT * Y4) / 100
    K5 = 1 - (ZUIDU_INPUT * Y5) / 100
    If In0 >= X1 And In0 < X2 Then
        Out = K1 + (In0 - X1) * (K2 - K1) / (X2 - X1)
    ElseIf In0 >= X2 And In0 < X3 Then
        Out = K2 + (In0 - X2) * (K3 - K2) / (X3 - X2)
    ElseIf In0 >= X3 And In0 < X4 Then
        Out = K3 + (In0 - X3) * (K4 - K3) / (X4 - X3)
    ElseIf In0 >= X4 And In0 < X5 Then
        Out = K4 + (In0 - X4) * (K5 - K4) / (X5 - X4)
    ElseIf In0 >= X5 Then
        Out = K5
        Error0 = True
    ElseIf In0 < X1 Then
        Out = K1
        Error0 = True
    Else
        Error0 = False
    End If