I change point type from float32 to float64 and get problem. This is example:
POINT have last data 12/04/2016 8:00:00. I have change point type on time 12/04/2016 8:30:00. When I use datalink functions PIArcVal with option PREVIOUS with date 12/04/2016 8:00 I got data for previous value, for example on 11/04/2016 8:00:00. And if I use date until date when I change point type(2/04/2016 8:30:00) I got this value on 11/04/2016 8:00:00. But if only I change date in function to 12/04/2016 8:30:01 I got my value on 12/04/2016 8:00:00. Only if I write to Archive data on 12/04/2016 8:00:01 I got previouse value on 12/04/2016 8:00:00.
How changing value correctly? I want that my fuction return to me correctly previous value on time 12/04/2016 8:00:00 and I don't want to add new same values on time 12/04/2016 8:00:01. Because of this problem we have problem with applictions, where use functions which return archive data.