“Simple Samples” are small projects that demonstrate simple features. The target is give a quick overview about the theme and be used as start point for related discussions. Follow there are a short description and the configuration main steps. 

Description:

In this simple sample, points are plotted on trend view object by scripting.

Requirements:

WinCC Professional V13 SP1.

Project with a minimum configuration (stop button, tags, etc.).

Configuration main steps:

X Y Trend by scripting (without tags):

• Place on screen the object “WinCC FunctionTrendControl” (Toolbox → controls)
• Configure the “WinCC FunctionTrendControl” (property pages) Trend → Add new:

Trend 1: name = MyTrend1, Data source = User defined tag

Trend 2: name = MyTrend2, Data source = User defined tag

• Place on screen a button. On event properties, click, create a VB script (in this example, trend 1 will show a parable and trend 2 a rectangle):

Sub OnClick(ByVal item)

' f(x) trend view_1

Dim IngFactor

Dim dblAxisX

Dim dblAxisY

Dim objTrendControl

Dim objTrend1

Dim objTrend2

Set objTrendControl = ScreenItems("f(x) trend view_1")

Set objTrend1 = objTrendControl.GetTrend("MyTrend1")

Set objTrend2 = objTrendControl.GetTrend("MyTrend2")

‘ploting by formula

For IngFactor = -100 To 100

dblAxisX = CDbl(IngFactor *0.02)

dblAxisY = CDbl(dblAxisX*dblAxisX+2*dblAxisX +1)

objTrend1.InsertData dblAxisX, dblAxisY

Next

‘ploting direct points - rectangle

dblAxisX = CDbl(0)

dblAxisY = CDbl(2)

objTrend2.InsertData dblAxisX, dblAxisY

dblAxisX = CDbl(2)

dblAxisY = CDbl(2)

objTrend2.InsertData dblAxisX, dblAxisY

dblAxisX = CDbl(2)

dblAxisY = CDbl(6)

objTrend2.InsertData dblAxisX, dblAxisY

dblAxisX = CDbl(0)

dblAxisY = CDbl(6)

objTrend2.InsertData dblAxisX, dblAxisY

dblAxisX = CDbl(0)

dblAxisY = CDbl(2)

objTrend2.InsertData dblAxisX, dblAxisY

End Sub