COM - dpGet()
Reads values from datapoint attributes and saves the values in variables.
Synopsis
HRESULT dpGet([in] VARIANT vDpName, [out] VARIANT *vValue);
Parameter
| Parameter | Description |
|---|---|
| vDpName | Datapoint attributes to be read. |
| vValue | Variables the values are saved in. |
Description
The function dpGet retrieves one or more strings with datapoint attributes in the vDpName parameter and returns the result in the vValue parameter. The type of vValue depends on the attribute type. If a datapoint does not exist, an error code is returned in vValue.
If only the datapoint is specified, :_online.._value is added. See also CTRL function dpGet().
Example
(See ComSample.xls, CComSample)
Public Sub dpGet()
Dim asDp(2) As String
Dim vValue As Variant
Dim i As Integer
'Abfrage eines einzelnen Wertes
moComManager.dpGet "ExampleDP_Arg1.:_online.._value", vValue
Debug.Print "ExampleDP_Arg1.:_online.._value", vValue
'Abfrage mehrerer Werte
asDp(0) = "ExampleDP_Arg2.:_online.._value"
asDp(1) = "ExampleDP_Result."
asDp(2) = "dp.dpe:conf.det.attr"
moComManager.dpGet asDp, vValue
For i = 0 To 2
Debug.Print asDp(i), vValue(i)
Next i
End Sub