About the Historian OPC Classic HDA Server

The Historian OPC Classic HDA server retrieves historical process data from Proficy Historian, and sends it to OPC Classic HDA clients. It dynamically updates the clients when tags are added and/or deleted in Historian. Clients that comply with this specification can connect to the OPC Classic HDA server to retrieve data from Historian.

Features of the OPC Classic HDA Server

The server complies with the OPC HDA Server specification 1.2.0.
You can browse for all the tags available in Historian.
You can convert Historian timestamps, data types, and qualities to OPC HDA timestamps, data types, and qualities, respectively.
You can automatically reconnect to the Historian server when connection is lost.
You can connect multiple instances of the OPC Classic HDA clients to the same server without any additional configuration. The OPC Classic HDA server has been tested with the following OPC Classic HDA clients:
- OPC Foundation HDA Sample client. You can download this client from www.opcfoundation.org
- Advosol HDA test client. You can download this client from http://www.advosol.com/t-free-tools.aspx

Limitations

The OPC Classic HDA server supports only synchronous read raw interface.