When TAC Vista is setup as an OPC Server, Can you access the Historical Data (HDA) from TAC Vista SQL DB
- TAC Vista
- OPC Server
- OPC Client
When TAC Vista is acting as an OPC Server and providing integration with a third party software / device, online and alarm values are all that is supported. Historical data is not supported via the OPC interface.
It is not possible to access the historical data from the Vista SQL database, when using Vista's OPC Server . It may be possible to get historical data with the help of some third party OPC-HDA-Server for SQL software. This option has not been tested, and issues related to this interface are also not supported.
Click on below link to see an example of OPC-HDA Server for SQL.