I would suggest event count and tagavg should help you understanding in case of any data issues between two servers. You can use Visualisation (trends) to monitor realtime e.g. PI Vision .
Thanks Lal, I'll see what i can do with that. Is there a reason why values in a Trend visualisation and a value in a simple Value visualization would be different for the same time stamp?
Can you share a screenshot? Also, can you share product name and version?
I would have suggested maybe the reason is one value is being interpolated while the other is the compressed value in the data archive. However, if the timestamp is the same on both objects, that is rather suspicious.
So i ended up doing what i believe works. I'll attach the script below. And im using PI ProcessBook 2015 Version 220.127.116.114. What my script does is a timer calls functions like the one below and the snapshot data on both servers is shown side by side in a listbox
Dim TimeStamp As String
TimeStamp = Format(Now(), "MM/dd/yyyy h:mm:ss")
'Declare Central Variables
Dim srvCent As Server
Dim TagNameCent As String
Dim TagCent As PIPoint
Dim TagValueCent As Single
'Declare Station Variables
Dim srvStat As Server
Dim TagNameStat As String
Dim TagStat As PIPoint
Dim TagValueStat As Single
'Grab Central PI Data
Set srvCent = Servers("SERVER 1 NAME")
TagNameCent = "TAG 1 NAME"
Set TagCent = srvCent.PIPoints(TagNameCent)
TagValueCent = TagCent.Data.Snapshot
'Grab Station PI Data
Set srvStat = Servers("SERVER 2 NAME")
TagNameStat = "TAG 2 NAME"
Set TagStat = srvStat.PIPoints(TagNameStat)
TagValueStat = TagStat.Data.Snapshot
'Will only show values that DONT MATCH between Central PI and Station PI
If TagValueCent <> TagValueStat Then
ListBox1.AddItem TimeStamp & " " & TagValueCent & " / " & TagValueStat, 0
ListBox1.ListIndex = 0