WaitForItemValue Method

Description

Subscribes to the specified OPC-DA item, and monitors its data until it has "good" quality, an error occurs, or the alloted time elapses.

DISPID (Dispatch ID):

For more information, see WaitForItemValue in .NET Reference.

Syntax

Visual Basic
Public Function WaitForItemValue( _ ByVal machineName As String, _ ByVal serverClass As String, _ ByVal itemId As String, _ ByVal requestedUpdateRate As Long, _ ByVal millisecondsTimeout As Long _ ) As Variant

Visual Basic

Public Function WaitForItemValue( _
   ByVal machineName As String, _
   ByVal serverClass As String, _
   ByVal itemId As String, _
   ByVal requestedUpdateRate As Long, _
   ByVal millisecondsTimeout As Long _
) As Variant

Parameters

machineName
serverClass
itemId
requestedUpdateRate
millisecondsTimeout

Return Type

See WaitForItemValue in .NET Reference.

Remarks

For remarks, see WaitForItemValue in .NET Reference.

Example

For examples, see WaitForItemValue in .NET Reference.