Platform-independent SCADA and IoT Architecture Based on Metadata

The architecture of SCADA and IoT systems based on the use of Modbus equipment (things) interfaces description metadata, markup of a graphical user interface and mapping of GUI elements to equipment registers were considered in the article. Solutions have been proposed for describing the interfaces of multicomponent such as containers, arrays of descriptors of arbitrary nesting, templates, as well as their regular display on the GUI elements of their rendering. The article defined common solutions and services for SCADA and IoT such as virtualization of equipment interfaces, tools for collection, compression, storage and transmission of streaming data. A scripting language for technological programming was proposed for server and client components. The article also described an example of developing a two-level SCADA for an electric energy storage system. A variant of using the UDP/CoAP/DTLS/IoT-Gateway/Modbus protocol stack was proposed to extend the basic Modbus protocol with the means of identifying and authorizing devices/things, transmitting asynchronous equipment events and ensuring connection security.