This directory contains examples for OPC client and subscriber development in Object Pascal (Delphi IDE). The examples cover OPC Data Access (OPC DA), OPC Alarms&Events (OPC A&E), OPC XML, and OPC Unified Architecture (OPC UA) specifications, including OPC UA PubSub. They are supported on Microsoft Windows.

The examples work with our sample servers and publishers. Most of them reside on the Web; OPC "Classic" servers for Windows are installed using the OPC Studio Setup program.

You can immediately build and run the examples to view the results.

Useful links:

• OPC client and subscriber examples in the documentation.
• OPC client and subscriber examples in Object Pascal on GitHub.
• OPC Studio Setup program
• Getting Started under COM.
• OPC Labs Knowledge Base.

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.