Hello:
I'm using the AF SDK to develop custom interfaces to our Pi Server, normally, we have the user enter start and end dates that they are interested in to narrow the search window. I've been asked to give them to the option to find tag values (for a set of tags) from the "birth" of the pi archive until until now (*).
I can have a timedate in an external database we use for configuration but I was wondering if there was a call tot eh AF SDK I could use.
Thanks,
Mike
Hi Mike,
As Dan said, there are no SDK calls to obtain the start date of the archive. The main focus of the SDKs is "data access" instead of "system management". For more information, I encourage you to check out this previous discussion here: PI Archive Start Time.
There are several ways you can accomplish what you are looking for:
Maybe you do a crafty PE to get the first event for a given PI Point? A PI Point may not even exist in historical archives so finding it's first value is probably more useful to you. Otherwise stick to 1970 as the first possible date?
NextEvent('Tag','01-01-1970 00:00:00')
Or something along those lines.
Thanks all for your quick responses, I think I'll go with the timestamp we will put into our external dB
There is no PI AF SDK or PI SDK call to obtain an archive start and end date. I believe our powershell tools can obtain the archive start and end dates.