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web-servicesrestopcopc-ua

Difference between OPC UA and REST Web-Service

I want to ask, what is the difference between OPC UA and REST Web-Service.

Solution

  • I am unable to comment (below 50 points) so small correction to Ramachandran G A statement "OPC-UA was a windows only protocol" -- it was OPC classic. The point with OPC UA is it is multi language, platform independent.

    As for the question, you compare two different things in sense REST WS is way more general, it is about how the data are exchanged in broad sense. OPC UA brings "logic" to data exchange -- alarms, events, historic data, filtering, subscription, etc.