GBADI0

Performance of EventPipes with PISDK over high latency links

Discussion created by GBADI0 on Jan 16, 2012
Latest reply on Jan 16, 2012 by mhamel

Hi, 

 

I am building a processbook that will display events based on an event pipe in a list box using PB 3.2.3.0 with PI SDK 1.3.6.363

 

I have some code which looks like this which will build the eventpipes.

 

 

 

 

 
Private Sub ConstructEventPipes()
    
    On Error GoTo errHandle
    
    Dim objAlarm As PISDK.pipoint
    Dim i As Integer
    
    Set EventPipes = New Collection
    Set objEvents = New Collection
    
    For i = 1 To AlarmList.Count
        Log "Getting Event Pipe " & i & " of " & AlarmList.Count, "alarms.ConstructEventPipes"
        EventPipes.Add AlarmList.Item(i).Data.EventPipe
        
        VBA.DoEvents
    Next
    
errHandle:
    If Not err.Number = 0 Then Log err.source & ": " & err.Description, "alarms.ConstructEventPipes"
    On Error GoTo 0

End Sub

 This works well over a local connection to the PI Server. With higher latency links the code gets exponentially slower through the for next loop.

 

Any suggestions on a better way to do this, or improvements to the existing code?

 

Thanks

 

 

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