From OpenSCADAWiki
Support for a given data source depends on the protocol or API, accordingly to which the source provides its data, and the availability for the protocol-API of the module of the subsystem "Data acquisition" in OpenSCADA or its implementation on the Logical Level by DAQ-Template. The total list of modules of the subsystem "Data acquisition" and documentation on them can be found here and generic list the DAQ-Templates can be found here.