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How do I configure PI AF templates?
PI AF templates let you define reusable structures for your asset hierarchy. Start by creating an Element Template in PI System Explorer, define attributes with default values and data references, then derive elements from it. Templates propagate changes automatically to all derived elements.
Write a PI Web API query in Python
Use the requests library to call PI Web API endpoints. For example: import requests response = requests.get( "https://piserver/piwebapi/points?nameFilter=sinusoid*", auth=("user", "pass"), verify=False ) points = response.json()["Items"]
What's the difference between snapshot and archive values?
Snapshot is the most recent value received by PI Data Archive — it's always the latest reading. Archive values are the historically stored readings after compression. PI uses swinging door compression to decide which values to keep, so archive may have fewer points than what was originally sent.
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