PI OPC DA/HDA Server

PI OPC DA/HDA Server is an OPC server for Data Archive. It implements the OPC Data Access (DA) standard 2.05a, and the OPC Historical Data Access (HDA) standard 1.2. It supports browsing, synchronous reads, asynchronous reads, read on change (also known as "advise" data), and both writes and deletes. It does not support the annotations and playback interfaces of the HDA standard, both of which are optional interfaces.