QuickOPC for OPC UA
(OPC Unified Architecture)

Simple OPC UA C# Example Using QuickOPC

The code below (in C#) reads and displays the current value of an OPC UA node, using QuickOPC:

// Obtain value of a node and display it in a message box 
MessageBox.Show(EasyUAClient.SharedInstance.ReadValue(
    "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer",
    "nsu=http://test.org/UA/Data/;i=10853").ToString());

The code below subscribes to changes of a monitored item value, and displays the value with each change:

// The callback is a lambda expression that displays the value 
EasyUAClient.SharedInstance.SubscribeDataChange(
    "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer", 
    "nsu=http://test.org/UA/Data/;i=10853", 1000,
    (_, args) => Console.WriteLine(args.AttributeData.Value));

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Useful links: Documentation / Examples / Knowledge Base

Supported OPC UA Operations (Client-Server)

• Discover OPC servers and applications locally and using the GDS (Global Discovery Server).
• Browse the address space of the OPC UA server.
• Read one or more values/node attributes.
• Write one or more values/node attributes.
• Subscribe to changes of a value/node attribute, and possibly later change the parameters of the subscription, or unsubscribe.
• Make method calls.
• Subscribe to events, and work with alarms.
• Work with application and user certificates.
• ...and much more.

Supported OPC UA Operations with PubSub

Most developers use the imperative programming model to create their applications. You can also:

• Display ready-made browsing dialogs with rich user interface, or create forms with flexible OPC browsing controls..
• Use Live Binding to enrich visual controls by OPC data without writing a code.
• Use Live Mapping to create .NET objects that represent connected OPC entities.
• Use Reactive Programming for high-level abstraction and complex operations on streaming data.

Compatibility

• Specifications: OPC Unified Architecture 1.00 - 1.05.
• Tested for OPC UA client interoperability on OPC Workshops.
• Runs on 32-bit ad 64-bit machines.
• Develop using C#, VB.NET, managed C++, or any other .NET language or COM tool, or in Python.
• Supports variuos OPC UA data types: Booleans, signed and unsigned integers with 8/16/32/64 bits, date.time, strings, single&double-precision floating point number, and structured/complex data types - all as scalars, single-dimensional or multi-dimensional arrays.

OPC UA Functionality Areas

• Generic/Data (needed by most developers).
• Alarms & Conditions.
• PubSub.

Testimonial

I came across your product after having looked at several and found it hands down the easiest one to get the job done quickly and reliably.

William F. Mitchell