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Data Source - OPC UA Historian

This article will be updated in the near future! In the meanwhile, if the following information is insufficient, contact support@flow-software.com.

OPC Unified Architecture(OPC UA) is a machine to machine communication protocol for industrial automation developed by the OPC Foundation.

The most significant difference between classical OPC and OPC UA is that it doesn’t rely on OLE or DCOM technology from Microsoft. This makes it possible to implement it on any platform including Apple, Linux (JAVA) or Windows.

The other very important part of UA is the ability to use structures or models. This means that the data tags or points can be grouped and be given context which make governance and maintenance much easier.

These models can be identified at runtime, which makes it possible for a client to browse possible connections without needing to preconfigure these. 

To create a connection to an OPCUA Historian, right-click on the Data Sources group, then click “More”, and then select “OPCUA Historian”.

Note: The OPCUA server must support the HDA protocol to extract historical data.

DataSources-ConnectToOPCUAHistorian.png

To successfully retrieve data from OPCUA Historian, the following properties need to be set.

DataSources-SetOPCUAHistorianProperties.png

  • Name (String)
 Name to identify the data source.
  • Server (String)
 Location of the OPCUA Server (Server Name or IP Address).
  • Port (String)
 Port of the OPCUA Server.
  • Username (String)
 If required, add the username to connect to the OPCHDA Historian.
  • Password (String)
 If required, add the password to connect to the OPCHDA Historian.
  • Maximum Concurrent
 Maximum concurrent connections that will be made to the OPCHDA Historian, default 20.
  • Connection Timeout
 Maximum Time to try and query Historical data from the OPCUA Server, default 15000 milliseconds.
  • Certificate Name
 If a certificate is required to connect to the OPCUA server, supply the name of the certificate in the text box.