QuickOPC

• NuGet package: OpcLabs.QuickOpc
• Python package: opclabs_quickopc

QuickOPC is a suite of OPC Client/Subscriber development components for .NET, COM and Python. These components are for OPC "Classic" (COM/DCOM-based), OPC XML-DA, and OPC Unified Architecture (including OPC UA PubSub) specifications.

Note: For OPC Server development, see OPC Wizard.

QuickOPC is a commercially licensed product. Without a license key, it runs in a trial mode. The trial provides valid data to client or subscriber applications for 30 minutes; after that period, the component (your app) needs to be re-started, and so on. You must also comply with licensing terms for 3rd-party material redistributed with QuickOPC. For details, see the documentation.

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Want a U.S.-based vendor? Get OPC Data Client (same product) from Software Toolbox.

Remember that NuGet or Python packages are primarily a tool for resolving build-time dependencies. The amount of functionality that you get through QuickOPC NuGet or Python packages is smaller than what QuickOPC can actually do for you. If you want a full coverage of the features, you would be better off downloading the Setup program from OPC Labs Web site. Further below you will find a list of differences between the two distribution forms.

QuickOPC requires .NET Framework 4.7.2 or .NET 8.0 as a minimum. Under .NET 8.0+, it is supported on Linux, macOS and Microsoft Windows. QuickOPC can also be easily used from Python.

PLEASE DO NOT USE PRE-RELEASE PACKAGES UNLESS INSTRUCTED TO DO SO.

Need help, tech support, or missing some example? Ask us for it on our Online Forums! You do not have to own a commercial license in order to use Online Forums, and we reply to every post.

List of available NuGet / Python packages

• OpcLabs.QuickOpc / opclabs_quickopc: OPC client and subscriber components for all environments and project types.

• OpcLabs.QuickOpc.Forms: Components that are specific for Windows Forms (can be partially used from WPF as well).

• OpcLabs.ConnectivityStudio.Sample.CS: Console-based OPC Wizard and QuickOPC examples in C# (source code).

• OpcLabs.ConnectivityStudio.Sample.VB: Console-based OPC Wizard and QuickOPC examples in VB.NET (source code).

What is included in the NuGet / Python packages

• Runtime assemblies for all OPC specifications and programming models.
• OPC browsing dialogs and browsing controls for Windows Forms.
• NuGet: IntelliSense support (XML comments).
• NuGet: LINQPad examples.

What is only available from the Setup program

• Support for COM development (VB6, PHP, Excel, Delphi and similar tools).
• Visual Studio integration, including Live Binding design-time support (codeless creation of OPC applications).
• Complete set of Examples and Demo applications, bonus material.
• OPC Data Access simulation server, various tools.

What is only available from the Setup program or the Web site

Knowledge Base link - Tool Downloads

• Various tools, such as Connectivity Explorer, Launcher, OPC UA Demo Publisher, OpcCmd Utility, UA Configuration Tool.
• License Manager (GUI or console-based) utility.

How to start

If you do not mind reading the documentation: Getting Started with QuickOPC. Or, the whole User's Guide.

Otherwise, just instantiate one of the following objects (depending on the OPC specification), and explore its methods:

• OpcLabs.EasyOpc.DataAccess.EasyDAClient (for OPC DA, OPC XML-DA Client development)
• OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEClient (for OPC A&E Client development)
• OpcLabs.EasyOpc.UA.EasyUAClient (for OPC UA Client development)
• OpcLabs.EasyOpc.UA.PubSub.EasyUASubscriber (for OPC UA Subscriber development)

Example code

C#:

using OpcLabs.EasyOpc.UA;
...

var client = new EasyUAClient();
object value = client.ReadValue(
    "opc.tcp://opcua.demo-this.com:51210/UA/SampleServer",
    "nsu=http://test.org/UA/Data/ ;i=10853");

Python:

import opclabs_quickopc
from OpcLabs.EasyOpc.UA import *

client = EasyUAClient()
value = IEasyUAClientExtension.ReadValue(client,
                                         UAEndpointDescriptor('opc.tcp://opcua.demo-this.com:51210/UA/SampleServer'),
                                         UANodeDescriptor('nsu=http://test.org/UA/Data/ ;i=10853'))

Examples on GitHub

As opposed to the sample NuGet packages, the examples on GitHub also include Web, Windows Forms, Windows Service and WPF projects.

• In C#: https://github.com/OPCLabs/Examples-ConnectivityStudio-CSharp.
• In Python: https://github.com/OPCLabs/Examples-ConnectivityStudio-Python .
• In VB.NET: https://github.com/OPCLabs/Examples-ConnectivityStudio-VBNET.

QuickOPC examples not using the package technology:

• In Object Pascal (Delphi): https://github.com/OPCLabs/Examples-ConnectivityStudio-OP
• In PowerShell: https://github.com/OPCLabs/Examples-ConnectivityStudio-PowerShell
• In PHP: https://github.com/OPCLabs/Examples-ConnectivityStudio-PHP
• In VB6: https://github.com/OPCLabs/Examples-ConnectivityStudio-VB
• In VBScript: https://github.com/OPCLabs/Examples-ConnectivityStudio-VBScript

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