• Specifications: OPC Data Access 1.0, 2.0 and 3.0, OPC Alarms and Events 1.10 and earlier, OPC Universal Architecture (through UA COM Proxy - included).
• Tested for compliance with standards and interoperability.
• Supports operating systems from Windows XP, Windows Server 2003 to Windows Vista, Windows 7 and Windows Server 2008 R2.
• Multi-threaded, non-blocking design for high performance.
• Internal messaging layer provides isolation between OPC communications and the custom client code, resulting in high resiliency.
• Automatically connects to and disconnects from OPC Servers.
• Automatically adds, removes and maintains OPC groups and items.
• Conserves resources behind-the-scenes by automatically disposing of objects that are not being used.
• No limits to number of connections, subscriptions, or tags.
• Automatic server status checking, detection of connection problems and server failures, and automatic reconnects.
• Maintains client state and reconstructs the internal state of OPC server after reconnection.
• Supports all flavors of OPC synchronous and asynchronous reads and writes, subscriptions, browsing, and property access.
• Multiple independent OPC server connections.
• Intelligent OPC Group parameter optimization.

Leaflet

QuickOPC is unbelievably easy to use - here is a complete Visual Basic (VB6) example which reads and displays OPC data from a common OPC server:

' Create EasyOPC-DA component Dim EasyDAClient As New EasyDAClient ' Read item value and display it Me.Text1 = EasyDAClient.ReadItemValue("", "OPCLabs.KitServer.2", "Demo.Single")

Do you think it can be any simpler? But the simplicity is not the only advantage; the component is also very powerful. Using complex heuristic algorithms to optimize itself on the fly, it provides the most efficient, fastest access to the OPC data.

C/C++ (native), Visual Basic, VBA, IIS, ASP, Delphi, PHP, Python, T-SQL, Visual FoxPro, VBScript, JScript, and any other tool and language able to consume COM automation objects.