ICP DAS USA U-7500 Series, User Manual

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OPC UA I/O Series User Manual V4.0 – ICP DAS
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3.4 RESTful API: Read and Write I/O and Virtual Point
This section describes RESTful API functions and usage. UA I/O supports RESTful API functions. Users can
remotely read and write the I/O points (include the virtual point) of UA I/O modules through HTTP.

What is Restful API?
REST (Representational state transfer) is a software architectural style that was created to guide the
design and development of the architecture for the World Wide Web. REST is a widely accepted set of
guidelines for creating stateless, reliable web APIs. A web API that obeys the REST constraints is
informally described as
RESTful . RESTful web APIs are typically loosely based on HTTP methods to access
resources via URL-encoded parameters and transmit data.

Use RESTful with UA I/O
Reading and writing the virtual points are the same as that of physical I/O points. Examples:
[ Example 1. ]
IP/AllVariableName :
Define 10 virtual points (all types are AO), and the names all start with VirtualTag
(red box in the figure below).
Or as following: