Manual > Practice > How to handle large amounts of data

overview

Array tags allow large amounts of data to be communicated with a single tag.

faeng_0053

This sample is stored in:

setting

Tag configuration

1.Set the array tag "T01". For details on array tags, please refer to the "Tag Manual".
faeng_0054

program

Describes the read and write operations.

●VB.Net

Private Sub btnRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles btnRead.Click

Dim varValue As Object = Nothing

Dim i As Integer

If AxEng1.ReadVal("U01.F01.T01", varValue) Then

For i = 0 To 31

txtVal(i).Text = CStr(varValue(i))

Next i

Else

For i = 0 To 31

txtVal(i).Text = "Error!"

Next i

End If

End Sub

'writing

Private Sub btnWrite_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

Handles btnWrite.Click

Dim varValue(32) As Double

Dim i As Integer

For i = 0 To 31

varValue(i) = CDbl(txtVal(i).Text)

Next i

If Not AxEng1.WriteVal("U01.F01.T01", varValue) Then

MsgBox("Fail to write. " & AxEng1.ErrMessage)

End If

End Sub