Semantic Coherence: OPC Labs – Signal Evidence & AI Readability

[H1] OPC Client Toolkit Made Right

QuickOPC is a Software Development Kit (SDK) for development of OPC clients and subscribers. It has characteristics that make it different from other OPC SDKs on the market. Specifically, it does not expose the imprint of the underlying OPC Classic or OPC UA stack methods to its own API - it does not require you to deal with the low level stuff. And, it transforms the OPC communication into an API that appears to be connection-less; this allows your code be free of all setup, tear-down, and re-connection worries.
[IMG: QuickOPC Product Box]

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Join thousands of developers who've ditched the complexity for QuickOPC. Download fully functional free trial.
Note: For OPC UA server toolkit, see OPC Wizard instead.

[H2] Communication beyond limits

Tired of wrestling with verbose OPC code that breaks under real-world pressure? QuickOPC is a radically new approach to access OPC data. It is an ideal tool to integrate OPC connectivity to custom applications involved in industrial automation or process control.
Fast Development. QuickOPC gives very short code to create OPC clients. In addition, using complex heuristic algorithms to optimize itself on the fly, QuickOPC toolbox provides the most efficient, fastest access to the OPC data.
Battle-Tested Reliability. OPC Labs has successfully tested the OPC client library at OPC Foundation Interoperability Workshops against a large set of OPC Servers from various vendors.
Why free libraries or "stacks" are not a good choice for professional OPC development? Read more about QuickOPC advantages...

Support for Certificate Management, OPC UA Alarms & Conditions and OPC UA PubSub.
Distribution formats: Nuget/Python packages, and an installer program.

[H2] Code example: Get started in seconds

You can develop an OPC client in just a few lines of code. The code below reads the value of an OPC UA data node and displays it. No boilerplate - just results.
// 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());

[H2] Architecture

QuickOPC has a modular architecture with clear separation of responsibilities.
[IMG: QuickOPC Layering Diagram]

[H2] QuickOPC Parts

The QuickOPC product allows development of clients for OPC protocols. It consists of:

QuickOPC for OPC Unified Architecture (OPC UA)
QuickOPC for OPC Classic (COM- and XML-based)

Cross-Platform Power: On Windows, Linux and macOS, QuickOPC components can be used from Microsoft .NET or Python programs. In addition, COM-based tools, and the "original" .NET Framework are supported on Windows.
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[H2] Why QuickOPC?

Faster Time-to-Market and Time-to-Revenue.
Use the built-in trial license to evaluate it freely, and without registration.
Regularly released new versions. More about product lifecycle.
All licenses are royalty-free.
OPC Foundation membership is not required.
Extensive, easy to understand conceptual and reference documentation, including rich IntelliSense support in the IDE.
Many code examples (also on GitHub), how-tos and step-by-step tutorials. Also included are examples directly for the most common servers on the market, such as Kepware KEPServerEX.
Qualified support.
It works in a wide range of programming languages and tools. C# and Visual Basic are the most obvious, but the list is very long.
OPC Specifications: QuickOPC supports OPC Unified Architecture, OPC Data Access 1.0, 2.0 and 3.0, OPC Alarms and Events 1.10 and earlier, and OPC XML-DA 1.01.
You can develop in .NET or Python on Microsoft Windows, Linux or Mac, or with a use of COM-based tools. Read more about the platforms.
You can pick from, or combine multiple development models. When developing user interfaces, you can replace or supplement the traditional imperative programming by a codeless Live Binding model. More advanced models such as Live Mapping, or Reactive Programming, are available as well.
QuickOPC toolbox is suitable for a wide range of usage areas in process control and industrial automation. For example, developing HMIs, dynamic recipe loading, or customized data loggers, is straightforward.

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[H2] Key Features

Tested for compliance with OPC protocol standards, and for interoperability.
Integration with Visual Studio development environment.
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.
No limits to number of connections, subscriptions, or tags.
Supports all flavors of OPC synchronous and asynchronous reads and writes internally, subscriptions, discovery, browsing, property access and method calls.
Wide range of developer productivity features: Intellisense, ReSharper annotations, serialization support, and many more.
Browsing Dialogs and Controls: Ready-made set of rich user interface (UI) OPC components for browsing the OPC world.

Read More

[H2] OPC Foundation Certification

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OPC Foundation Certified for Compliance logo indicates that this product has been tested by an independent certification lab and certified to be compliant with the following OPC UA Profiles which are part of the OPC UA Specifications:
- Core Client Facet - Attribute Read Client Facet - Base Client Behavior Facet Discovery Client Facet - Attribute Write Client Facet - DataChange Subscriber Client Facet - DataAccess Client Facet
All QuickOPC supported profiles for OPC UA

[H2] OPC Foundation Compliance Test

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OPC Foundation Self-Tested for Compliance logo indicates that this product has been tested by the manufacturer to be compliant with the following OPC Specifications:- Data Access 2.00- Data Access 2.05a- Data Access 3.00
Additional information about compliance testing, logo program and a summary of test results can be found at www.opcfoundation.org for: QuickOPC (Product Catalog Listing).
OPC Foundation Self-Tested for Compliance logo is a trademark of the OPC Foundation and may be used only by written permission of the OPC Foundation. Any unauthorized use of the Self-Tested for Compliance logo is prohibited.

[H2] Testimonial

I came across QuickOPC.net when undertaking a c# project that needed to access data in a Siemens PLC using OPC. Having used the free trial version, it quickly became clear that QuickOPC.net would remove the need for an in-depth knowledge of OPC client to server protocols and would allow me to concentrate on the application itself. It is very robust, easy to integrate into a .net project and the response to my questions by email was excellent. I'd certain only recommend the product and the company.
Peter Thomas, Control Specialists Ltd

[H1] Connectivity Software Product Family

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This is the common Connectivity Software setup package for Windows, containing:

QuickOPC (OPC toolkit for client and subscriber development)
OPC Wizard (easy OPC UA server development)
Excel Connector (access real-time OPC data in Excel)
Rapid Toolkit for Sparkplug (host application and edge node development)

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Current version: Connectivity Software 2026.1.End User License Agreement (EULA)

This Windows installer is identical for both free trial, and commercial editions. The free trial provides valid data for 30 minutes; after that period, the component needs to be re-started, and so on. We can provide you with evaluation license that will relax or lift the limitations of the trial license, if you need it for verification that the product is right for you. In such case, please contact us and explain your situation.
QuickOPC, OPC Wizard and Rapid Tookit for Sparkplug are also available in NuGet and Python package distribution formats. Use NuGet for .NET Framework and .NET 8+ development, on Linux or macOS, and also for reliable dependency management and build automation. The NuGet or Python packages are enough to get you started. However, the Windows setup package also contains additional tools, support for COM development, complete set of examples and demo applications, IDE integration etc.
You can also start directly with Connectivity Software QuickOPC Examples, OPC Wizard Examples, or Rapid Toolkit for Sparkplug Examples. The examples can be downloaded in ZIP and TGZ archive formats, and are also available on OPC Labs GitHub. For development in Python, see QuickOPC Python Examples. The code references the QuickOPC NuGet or Python packages which, with most tools, then get downloaded and installed automatically.

[H2] Included Software

OPC "Classic" simulation server, runnnig as Windows Service, used in the examples, is installed as part of the QuickOPC setup. You can bypass this by selecting custom installation and turning the corresponding component(s) off. The Connectivity Software setup program does not install any additional software to the target system.
[H2] Uninstall Instructions >

Sparkplug is a trademark of Eclipse Foundation, Inc. "MQTT" is a trademark of the OASIS Open standards consortium. Other related terms are trademarks of their respective owners. Any use of these terms on this site is for descriptive purposes only and does not imply any sponsorship, endorsement or affiliation.

[H3] Supported Operating Systems

The Setup program is for Microsoft Windows only. Products in Connectivity Software family also support Linux and Mac (the development is done via NuGet or Python packages).

QuickOPC Required Operating Systems
Excel Connector Requirements
OPC Wizard Required Operating Systems
Rapid Toolkit for Sparkplug Requirements

[H3] Supported .NET Runtimes

Products in Connectivity Software family generally support .NET Framework and .NET 8+. However, the specific supported versions may differ.

QuickOPC Required .NET Runtimes
Excel Connector Requirements
OPC Wizard Required .NET Runtimes
Rapid Toolkit for Sparkplug Requirements

Although based on .NET, QuickOPC supports COM-based and native development as well! Use the same installation package.

[H3] Primary Development Tools

The development tool is your choice. There are, however, some popular tools that we had in mind when designing and testing the product.

QuickOPC Development Tools
OPC Wizard Development Tools
Rapid Toolkit for Sparkplug Requirements

[H3] OPC Compatibility

QuickOPC: Refer to the documentation for OPC Specifications supported. If you need to match the client capabilities against requirements expressed in terms of OPC UA profiles, see OPC UA Profiles in the documentation for the full list of profiles supported. You can also consult lists of OPC UA Services and OPC UA Security Policies supported.
OPC Wizard Specifications
Excel Connector Specifications

[H3] Sparkplug Compatibility

Rapid Toolkit for Sparkplug Specifications

[H3] Additional Files

Follow this link for standalone GUI-based or console-based License Manager utility (no installation, just plain .EXE).

[H3] Older Versions

Consider one of the past versions if you need to run on an older operating system, or an older version version of .NET Framework or .NET Core. Note that support for older versions is limited.

[H2] PicoOPC

PicoOPC for .NET is available as NuGet package from www.nuget.org.

Required disclosure: Connectivity Software (QuickOPC, Excel Connector, OPC Wizard, etc.) is a suite of software development kits (SDKs) for development of automation software applications. Installing Connectivity Software or its parts or options does not change system settings.

[H1] Rapid OPC UA Server Development

OPC Wizard is a software toolkit for rapid development of OPC UA servers (OPC Unified Architecture). Its aim is to allow the fully functional server be developed with minimal boilerplate code and programming effort. Intricacies of OPC UA standard are handled by the OPC Wizard internally, and hidden from the developer.
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The toolkit provides system integrators, OEMs and software developers with ability to create their own OPC UA servers without having to learn and implement the thousands of pages of OPC UA specifications.
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Download fully functional free trial.
Note: For OPC client and subscriber toolkit, see QuickOPC instead.

[H2] Why OPC Wizard?

Faster Time-to-Market and Time-to-Revenue.
OPC Foundation membership not required.
Low-ceremony OPC UA server library. No unnecessary boilerplate code.
No hassle with UA configuration or nodeset files, or node manager classes!
Extensive, easy to understand conceptual and reference documentation, including rich IntelliSense support in the IDE.
The OPC server SDK comes with tons of examples, how-tos and step-by-step tutorials available.
Allows secure local and remote communication with OPC UA application authentication via certificates.
None, Basic256Sha256, Aes128_Sha256_RsaOaep, Aes256_Sha256_RsaPss security policies with signing and optional encryption.
You can develop servers in multiple programming languages. C# and VB.NET are the most common ones.
You can use .NET Framework or the new .NET.
Host your server in a console application, desktop application with user interface, Windows service, or otherwise.
Runtime-free licenses (no royalties for distribution).

Download Free Trial

OPC Wizard Listing in Product Catalog on OPC Foundation Site

[H2] Show me the code!

Following C# OPC UA server example uses OPC Wizard to implement a fully functional OPC UA server with a data variable that provides random integer values.
var server = new EasyUAServer();
var random = new Random();
server.Add(new UADataVariable("DataVariable1").ReadValueFunction(() => random.Next()));

server.Start();
Getting Started with OPC Wizard

[H2] OPC Wizard Key features

Constructs the address space from your code.
Provides all OPC UA services necessary for reading, writing, subscriptions, and discovery.
No artifical limit to the number of clients, connections, subscriptions, or tags.
Reusable OPC UA Application Administration dialog.
Support of 32- and 64-bit applications.
Your server automatically integrates with OPC UA Local Discovery Server (LDS).
Operation monitoring services for easier troubleshooting.
Can be used from a range of development tools and IDEs. Integration with Visual Studio development environment.
Tested for OPC interoperability with wide range of clients.
Comes with a set of accompanying tools, such as test clients.
OPC UA server development package available on nuget.org.

OPC Wizard is especially well suitable for replacement of OPC DA servers written with OPC Classic toolkits. OPC Wizard is also the recommended OPC Server SDK (by the manufacturer) for migration from SLIK-DA/UA OPC Server Toolkit.