- Connecting to multiple OPC servers over DCOM or COM+.
- Extracting string and numeric datapoints from OPC tags.
- Reading historical data from OPC HDA, storing progress in a local or remote state store.
- Starting from a local JSON file instead of reading the server on each startup, improving performance.
About the Cognite OPC Classic extractor
Read time series and asset information via OPC DA and HDA protocols and stream datapoints to Cognite Data Fusion (CDF).
The extractor copies the OPC hierarchy to CDF, then streams datapoints to time series in CDF. The OPC Classic extractor supports the following:
Last modified on May 6, 2026