The Central Processing Unit (CPU) is the core of a PLC, responsible for executing programmed instructions, processing data, and controlling input/output (I/O) operations. It functions similarly to a computer processor but is optimized for real-time control and industrial. Since 1968, with the introduction of the first Modicon programmable logic controller, PLCs have been the driving force behind all of industrial automation. PLCs are notable for having several important characteristics. It processes inputs, executes a control program, and generates outputs to manage machinery, manufacturing lines, and various industrial processes. As we discussed in our last tutorial about it is a very flexible, reliable, and fast time response controller. Engineers, technicians, and decision-makers looking to install or upgrade automation infrastructure must understand these systems' hardware design. Whereas the PLC software refers to the PLC's operating system and application program that are stored in the PLC's memory.
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