proficy

How can I retrieve raw time-series data from a Proficy Historian/iHistorian? Ideally, I would ask for data for a particular tag between two dates. There are several different sampling modes you can experiment with. Raw Interpolated Lab Trend Calculated These modes are available using all of the following APIs. User API (ihuapi.dll) SDK (ihsdk.dll) OLEDB (iholedb.dll) Client Acess API (Proficy.Historian.ClientAccess.API) Of these the trend sampling mode is probably what you want since it is specifically designed for charting/trending. Though, lab and interpolated may be useful as well. Read the