Is it possible to adjust compression deviation based on another pi points instantaneous value? For example, changing the compdev for a bearing temperature if vibration reaches a certain setpoint.
This is an interesting question, would it be possible for you to expand a bit more on your use case here? Point edits (similar to point creation/deletion) are a relatively expensive task for a PI Data Archive to perform, so it is generally preferred to avoid excessive or constant tag edits.
That said, I do not know of a way to to do this out of the box. Capturing when a tag's value meets a condition is simple using AF Analytics, however, they cannot modify another attribute or tag's configuration based on these conditions. A custom AFSDK application could certainly do something like this, however, like I mentioned above I don't think a solution that involves continual tag configuration edits would be ideal.
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