Final answer:
The PLC Central Processing Unit (CPU) is responsible for processing and executing the logic and control instructions stored in the PLC's memory.
Step-by-step explanation:
The PLC Central Processing Unit (CPU) is the brain of a Programmable Logic Controller (PLC), which is a type of computer used in industrial automation.
The CPU is responsible for processing and executing the logic and control instructions stored in the PLC's memory. It receives input signals from various sensors, performs the necessary calculations and logic operations, and then sends output signals to control the connected devices or machinery.
For example, in a manufacturing plant, a PLC CPU can receive input signals from temperature sensors, pressure switches, and limit switches. Based on the programmed logic, the CPU can determine the appropriate actions to take, such as activating a motor, opening or closing valves, or displaying an alarm message. The CPU continuously monitors and controls the process or machine to ensure proper functioning.