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单词 Programmable logic control
释义

Programmable logic control

中文百科

可编程逻辑控制器 Programmable logic controller

(重定向自Programmable logic control)
底板上由左至右分别是:电源模块PS407 4A,处理器模块416-3,接口模块IM 460-0和通讯处理器模块CP 443-1
常见的可程序逻辑控制器外观
PLC内部运作架构
可程序逻辑控制器硬件构成

可编进程控制器Programmable Logic Controller,简称PLC),一种具有微处理器的数字电子设备,用于自动化控制的数字逻辑控制器,可以将控制指令随时加载内存内保存与运行。可程序控制器由内部CPU,指令及数据内存、输入输出单元、电源模块、数字模拟等单元所模块化组合成。PLC可接收(输入)及发送(输出)多种型态的电气或电子信号,并使用他们来控制或监督几乎所有种类的机械与电气系统。

最初的可编进程逻辑控制器只有电路逻辑控制的功能,所以被命名为可程序逻辑控制器,后来随着不断的发展,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、多机通信等许多的功能,名称也改为可程序控制器(Programmable Controller),但是由于它的简写也是PC与个人电脑(Personal Computer)的简写相冲突,也由于多年来的使用习惯,人们还是经常使用可程序逻辑控制器这一称呼,并在术语中仍沿用PLC这一缩写。

英语百科

Programmable logic controller 可编程逻辑控制器

(重定向自Programmable logic control)
Siemens Simatic S7-400 system in a rack, left-to-right: power supply unit (PS), CPU, interface module (IM) and communication processor (CP).
Control panel with PLC (grey elements in the center). The unit consists of separate elements, from left to right; power supply, controller, relay units for in- and output
PLCLogix PLC Simulation Software
Allen-Bradley PLC installed in a control panel

A programmable logic controller, PLC, or programmable controller is a digital computer used for automation of typically industrial electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or light fixtures. PLCs are used in many machines, in many industries. PLCs are designed for multiple arrangements of digital and analog inputs and outputs, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed-up or non-volatile memory. A PLC is an example of a "hard" real-time system since output results must be produced in response to input conditions within a limited time, otherwise unintended operation will result.

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更新时间:2025/6/19 18:38:04