OPC DA

OPC DA, or "OLE for Process Control - Data Access", is a set of classic standards and specifications used in industrial automation and process control systems. It is a communication protocol that enables data exchange between industrial automation devices and software applications, primarily for real-time data access and monitoring.

The Listener allows you to retrieve tag values on the OPC DA Server.

The Action Agent allows you to publish the supplied tag values and timestamps on the OPC DA Server.

Pre-requisites

• This redistributable must be installed on the Stream Host if the OPC DA environment is not hosted on the same server.

• The Stream Host that this Agent will run on must have a Windows operating system.

OPC DA cannot run on Linux because it's built entirely on Windows-specific technologies (COM/DCOM) that are part of the Windows operating system itself.

Current Version

• Request the OPC DA Listener v1.47

• Request the OPC DA Action Agent v1.34

Please contact XMPro if you're looking for an older version of this Agent.

OPC DA Listener Release Notes

Version	Date	Description
1.47	27 Dec 2024	Repackaged to translate the Agent's properties.
1.46	06 Mar 2024	Support variables. Standardized field naming. Handled error when opening previously configured agent. Optimized Agent's UI flow.
1.45	12 Jan 2024	Support including the Quality of each tag value in the output payload.
1.44	21 Nov 2023	Repackaged to standardize the Agent name.
1.43	14 Nov 2023	Return null value for tags that are not defined for some equipment.
1.42	13 Nov 2023	Support importing tags from CSV file. Support transposing data by Equipment ID.
1.32	30 Oct 2023	Repackaged the resource to be in the resource group.
1.31	26 Oct 2023	Added error handling if pre-requisite redistributable is not installed. Error check added to the Integrity Check Handle error gracefully when a new Agent is added to the canvas and configuration opened
1.30	18 Sep 2020	Added name filter and limiting results to 100.
1.20	10 Sep 2020	Added tag browsing functionality.
1.10	28 Aug 2020	Added server discovery and authentication options.
1.03	22 May 2020	Moved connection and disconnection into runtime function to reduce the chance of connection errors.
1.02	22 May 2020	Added additional checks to ensure that the server is connected before it attempts to read server data.
1.01	18 May 2020	Added error handling.
1.00	06 May 2020	Initial Release.

OPC DA Action Agent Release Notes

Version	Date	Description
1.34	27 Dec 2024	Repackaged to translate the Agent's properties.
1.33	06 Mar 2024	Support variables. Standardized field naming. Handled error when opening previously configured agent.
1.32	21 Nov 2023	Repackaged to standardize the Agent name.
1.31	26 Oct 2023	Added error handling if pre-requisite redistributable is not installed. Error check added to the Integrity Check Handle error gracefully when a new Agent is added to the canvas and configuration opened
1.30	18 Sep 2020	Added name filter and limiting results to 100.
1.20	10 Sep 2020	Added tag browsing functionality.
1.10	28 Aug 2020	Added server discovery and authentication options.
1.00	18 May 2020	Initial Release.