UaExpert (Unified Automation) is the reference free OPC UA client for Windows, Linux and macOS: it browses the Address Space, reads and writes values, subscribes to changes, calls Methods and manages certificates, and is an indispensable tool for any OPC UA integrator.
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UaExpert covers the full feature set an integrator needs day to day. It exposes the Address Space as a tree, offers type-aware Read/Write panels, plots subscribed values on real-time graphs, lets you call Methods through auto-generated input forms, and manages the trust and rejected certificate folders directly from the UI. Plug-ins extend it with a Performance Analyzer, a History Trend View and a Data Logger. It is free for commercial use and is downloaded from unified-automation.com. Common competitors are the Prosys OPC UA Browser, the OPC UA Foundation Sample Client and the Prosys OPC UA Modeler.
Make UaExpert your first reflex when a SCADA cannot read a tag: connecting with UaExpert tells you in 30 seconds whether the problem is in the server, in the certificate trust, or in the SCADA driver mapping.
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Related questions
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- The OPC UA Address Space is a hierarchical structure of Nodes linked by typed References (HasComponent, HasProperty, HasTypeDefinition, etc.), exposed as a graph that clients can walk through the Browse service.1. Architecture · Address Space
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