The PLC usually also have some memory called ROM and EEPROM. Where does the PLC save all it’s information? The PLC has memory like a computer, called RAM or random access memory. The microprocessor is where the PLC program processes all the input and output signals. The brain of a PLC is also a microprocessor, but less powerful than the ones in computers. Microprocessors are everywhere and the most known microprocessor is the one all computers have. Microprocessors are integrated circuits that run programs. You might have heard about microprocessors. To be more precise, this is the part that runs the PLC program. This is the brain of the PLC, where all calculations go on. If you know about these four main hardware components in the PLC that should do it. Of course, most PLC’s consists of many components but these for are the most important ones. CPU (central processing unit, the microprocessor, memory).We can divide those components into four categories: The PLC is designed with some basic hardware components, that each adds it’s own function to the PLC. The hardware components are the physical building blocks of the PLC. It is crucial to know about the basic PLC hardware components that are inside PLC, because it will make your understanding of the PLC much easier.
The basic architecture of a PLC is important to understand.