Can we add multiple pointsource in a single PI UFL interface instance,
No, one instance of UFL is linked to one pointsource.
You can however create multiple instances of an interface on the same node, each having a different pointsource, settings, .INI files, etc.
If i remember correctly, licenses are per interface node, not per instance so you might only need one license for mutiple instances. But you need to check that with your OSIsoft account manager!
Roger is right, there is no possibility of configuring multiple pointsources for one instance. You still can have no /PS specified and write to all the points from the PI Server - but I would not recommend it. I would rather go with multiple instances of PI Interfaces for UFL as mentioned above.
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