How do I write VBA macros in PI ProcessBook?
How do I write VBA macros in PI ProcessBook?
PI ProcessBook supports VBA macros for automating displays, building custom interactions, and extending functionality.
Opening the VBA Editor
- Open your ProcessBook display (.pdi file).
- Press Alt + F11 or go to Tools > Macros > Visual Basic Editor.
- In the editor, double-click ThisDisplay to add code to the display module.
Common VBA Examples
Toggle Multi-State Visibility
Private Sub CommandButton1_Click()
Dim sym As Symbol
Set sym = ThisDisplay.Symbols("Trend1")
sym.Visible = Not sym.Visible
End Sub
Read a PI Tag Value
Dim srv As PISDK.Server
Dim pt As PISDK.PIPoint
Dim val As PIValue
Set srv = PISDK.Servers.DefaultServer
srv.Open
Set pt = srv.PIPoints("Sinusoid")
Set val = pt.Data.Snapshot
MsgBox "Value: " & val.Value & " at " & val.TimeStamp.LocalDate
Navigate Between Displays
Private Sub OpenOverview_Click()
Application.Displays.Open "C:\Displays\Overview.pdi"
End Sub
Tips
- Use the PI SDK object model (PISDK.dll) to access PI data programmatically.
- Store reusable code in VBA modules rather than individual display code-behind.
- ProcessBook VBA runs in a 32-bit environment — keep this in mind for COM references.
- Consider migrating complex VBA logic to PI Vision custom symbols for modern deployments.
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