We have spent some time to get aquinted with PI Vision 4 and the new extensibility model. We are all no programmers, so we did spend some time on the learning curve here. But next to getting a head start on PI Vision 4, we also managed to create a symbol to display EventFrame information. The symbol simply shows EventFrames, grouped by category, along a timeline. If you align this with a Trend symbol, it gives you the EventFrame context of the Trend values:
And a short video showing the overlay: PI Vision 4 EventFrames symbol - YouTube
Of course, strapped for time as we had lots of project work, team members needing to spend time elsewhere, etc., so there are some items not done yet:
- there is no service delivering the time of the display, and we did not change the Web API calls to make use of the timestamps provided by the OnChange handler. So timerange is fixed
- ran out of time to do a search for Elements and Categories, so currently WebID is a configuration item, and no filtering on EF categories is done
- a bug in the amCharts datetime formatting of the dates in the balloon, so no formatting there
Unrealized ideas: plenty! Key item we wanted to include is writeback of Acknowledgements, Reasons, etc. Overlay of a trend, etc.