How does power saving mode function in a CPS node?

Power saving mode in a CPS (Cyber-Physical System) node primarily functions by holding data during shutdown. This allows the system to conserve energy while still retaining important information that can be accessed when the system is turned back on. This method is essential for devices that need to maintain their state or critical information without fully powering up, thus saving energy.

Holding data during shutdown helps maintain operational efficiency and ensures that the node can quickly resume functions without losing any critical data, which is especially important in applications that require reliable performance under limited power conditions. This approach allows for energy conservation while ensuring continuity in data management, making it a significant component of power saving strategies in CPS nodes.

The other options do not accurately represent the functioning of power saving mode. Increasing energy supply contradicts the purpose of power saving, reducing memory usage isn't directly related to power conservation, and providing motion data typically refers to active operation rather than energy-saving measures.