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Cyber-physical systems (CPSs) for real-time advanced process control (RT-APC)are a class of control systems using network communication to controlindustrial processes. In this paper, we use simple examples to describe thesoftware principles and concepts used in the implementation of such systems.The key software principles are 1) shared data in the form of a database,files, or shared memory, 2) timers and threads for concurrent periodicexecution of tasks, and 3) network communication between the control system andthe process, and communication between the control system and the internet,e.g., the cloud to enable remote monitoring and commands. We show how toimplement such systems for Linux operating systems applying the C programminglanguage and we also comment on the implementation using the Python programminglanguage. Finally, we present a complete simulation experiment using areal-time simulator.

Software principles and concepts applied in the implementation of cyber-physical systems for real-time advanced process control