PLC คืออะไร

PLC stands for Programmable Logic Controller. It is a type of industrial control system that is used to automate processes and control machinery in manufacturing, industrial, and other settings. A PLC consists of a central processing unit (CPU), input/output (I/O) modules, memory, and communication ports.

The CPU of a PLC runs a program that is written by the user to control the system. The program is typically created using specialized software that allows the user to create a sequence of instructions, or ladder logic, that controls the operation of the system. The I/O modules of a PLC are used to connect sensors and actuators to the system, allowing the PLC to monitor and control the process.

PLCs are widely used in manufacturing and other industries because they provide a high level of flexibility, reliability, and control. They are particularly useful in applications where the process is complex or where there is a need for precise control and monitoring of multiple variables.