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 server if the OPC DA environment is not hosted on the same server.

Current Version

• Request the OPC DA Listener v1.46.

• Request the OPC DA Action Agent v1.33.

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

OPC DA Listener Release Notes

v1.46, 06 Mar 2024

• Added use variable support

• Standardized field naming

• Handled error when opening previously configured agent

• Optimized Agent's UI flow

v1.45, 12 Jan 2024

• Added support to include the Quality of each tag value in the output payload

v1.44, 21 Nov 2023

• Repackaged to standardize the Agent name

v1.43, 14 Nov 2023

• Return null value for tags that are not defined for some equipment

v1.42, 13 Nov 2023

• Added support to import tags from CSV file

• Added support to transpose data by Equipment ID

v1.32, 30 Oct 2023

• Repackaged the resource to be in the resource group

v1.31, 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

2020

v1.3, 18 Sep 2020

• Added name filter and limiting results to 100

v1.2, 10 Sep 2020

• Added tag browsing functionality

v1.1, 28 Aug 2020

• Added server discovery and authentication options

v1.03, 22 May 2020

• Moved connection and disconnection into runtime function to reduce the chance of connection errors

v1.02, 22 May 2020

• Added additional checks to ensure that the server is connected before it attempts to read server data

v1.01, 18 May 2020

• Added error handling

v1.0, 06 May 2020

• Initial release

v0.5, 03 Apr 2020

• First draft

OPC DA Action Agent Release Notes

v1.33, 06 Mar 2024

• Added use variable support

• Standardized field naming

• Handled error when opening previously configured agent

v1.32, 21 Nov 2023

• Repackaged to standardize the Agent name

v1.31, 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

2020

v1.3, 18 Sep 2020

• Added name filter and limiting results to 100 items

v1.2, 10 Sep 2020

• Added tag browsing functionality

v1.1, 28 Aug 2020

• Added server discovery and authentication options

v1, 18 May 2020

• Initial Release