We work often with a control system called DeltaV made by Emerson. DeltaV has its own Process Historian which is a time series database. I believe Emerson currently provides two interfaces to the historical data for external applictions - A custom SOAP Web Service and an OPCHistory interface - NOT OPC-UA.
We would like to use Grafana to visualize data from the DeltaV archives without copying the data into another database like InfluxDB. Is this possible and if so, how?