PU519  3BSE018681R1PLC可编程控制器

可编程逻辑控制器（PLC）是一种数字运算操作的电子系统，专为在工业环境应用而设计的。它采用可编程的存储器，在其内部存储执行逻辑运算、顺序控制、定时、计数和算术运算等操作的指令，并通过数字式或模拟式的输入输出来控制各种类型的机械设备或生产过程。

可编程控制器由 CPU 、指令及数据内存、输入/输出接口、电源、数字模拟转换等功能单元组成。 早期的可编程逻辑控制器只有逻辑控制的功能，所以被命名为可编程逻辑控制器，后来随着不断地发展，这些当初功能简单的计算机模块已经有了包括逻辑控制、时序控制、模拟控制、多机通信等各类功能，名称也改为可编程控制器(Programmable Controller)，但是由于它的简写PC与个人电脑(Personal Computer)的简写相冲突，加上习惯的原因，人们还是经常使用可编程逻辑控制器这一称呼，并仍使用PLC这一缩写。

PU519  3BSE018681R1PLC可编程控制器

A programmable logic controller (PLC) is an electronic system that operates numerically and is designed for use in industrial environments. It uses a programmable memory in which the instructions for performing operations such as logical operations, sequence control, timing, counting and arithmetic operations are stored, and various types of mechanical equipment or production processes are controlled through digital or analog inputs and outputs.

The programmable controller is composed of CPU, instruction and data memory, input/output interface, power supply, digital analog conversion and other functional units. The early programmable logic controller only has the function of logic control, so it is named programmable logic controller. Later, with the continuous development, these computer modules with simple functions have various functions including logic control, timing control, analog control, multi-machine communication, etc. The name was also changed to Programmable Controller, but due to the conflict between the abbreviation PC and the abbreviation Personal Computer, and for reasons of custom, the term programmable logic controller is often used and the abbreviation PLC is still used.