In a CPS node, what is the function of a controller?

The function of a controller in a Cyber-Physical Systems (CPS) node is primarily to execute programs. The controller serves as the brain of the CPS node, managing various operations and tasks necessary for the node's functionality. It interprets instructions from software to perform specific actions that may involve monitoring, controlling physical processes, or interacting with other system components.

In a broader context, while other functionalities like data storage, communication, and data collection are vital within a CPS node, they are typically handled by other components or systems working in conjunction with the controller. The controller focuses on executing the logic and algorithms that dictate how the CPS fulfills its intended operations, thus playing a crucial role in the overall performance and effectiveness of the system.