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VB for WinCC question

VB for WinCC question

VB for WinCC question

Hi there,

I'm relative new to VB, I got a small problem. I'm using WinCC with VBS, it's something like VBA in excel.

I've got one variable called Dummy, this var can contain three conditions namely 1,2 and 4. If it contains 1 then a tekst (Press 3)should be displayed in var Test and so on.
In fact it's a selection of 3 radio buttons, it depends on which button is clicked which tekst should be displayed.

I wrote the following code

Sub OnLButtonDown(ByVal Item, ByVal Flags, By Val x, By Val y)

Dim dummy, Test

Set Dummy = HMIRuntime.Tags(“Dummy”)
Set Test = HMIRuntime.Tags(“Test”)

If Dummy = 1 Then Test = (“Pers3”)
        If Dummy = 2 Then Test = (“Pers4”)
        Else Test = (“Pers5”)
    End IF
End IF
End Sub

What am I doing wrong ?

RE: VB for WinCC question

First thing I notice is that you are comparing an object to a value. The Set command indicates you are setting an object. Objects can not be compared to values. You may have to access a property of the object to compare it to.

Set Dummy = ...
If Dummy = 1  - Probably causing problem

Maybe something like
Dummy.Value, Dummy.Count, ...?

While I welcome e-mail messages, please post all thread activity in these forums for the benefit of all members.

RE: VB for WinCC question


Perhaps something like

Dim Dummy
Dummy = HMIRuntime.Tags(“Dummy”).value


RE: VB for WinCC question

That may work.

Also, if Test is an object, you'll have to define it using the Set method.

Sub OnLButtonDown(...)

Dim dummy, Test

  Set Test = HMIRuntime.Tags(“Test”)

  Dummy = HMIRuntime.Tags(“Dummy”).value
  If Dummy = 1 Then
    Set Test = HMIRuntime.Tags(“Pers3”)
  ElseIf Dummy = 2 Then
    Set Test = HMIRuntime.Tags(“Pers4”)
    Set Test = HMIRuntime.Tags(“Pers5”)
  End IF
End Sub

Unfortunately, I don't have WinCC, so I'm just grabbing at straws.

While I welcome e-mail messages, please post all thread activity in these forums for the benefit of all members.

RE: VB for WinCC question

The advice by others is absolutely correct.
You need to use the .read and .write properties as follows...

Set Dummy = HMIRuntime.Tags(“Dummy”)
Set Test = HMIRuntime.Tags(“Test”)

If Dummy.read = 1 Then Test.write = (“Pers3”)
        If Dummy.read = 2 Then Test.write = (“Pers4”)
        Else Test.write = (“Pers5”)
    End IF
End IF
End Sub

I hope that this gets you away.



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