可编程逻辑操控器(PLC)是工厂主动化和工业进程操控不行切割的构成有些。PLC经过各种协议的各类接口通讯，操控各种模仿/数字传感器和致动器。除了具有操控功用，PLC还能够进行信号处理和数据变换。自从面市以来，PLC在构造以及功用上都有了很大的翻开。在构造上，由于工厂车间对更多的特性、精度和互联的需求，推动其集成度越来越高，PLC现已从工业PC和PAC(可编程逻辑主动操控器)翻开到时下的紧凑型封装和微型PLC;在功用上，如今的PLC现已从简略的输入输出操控器翻开到完好的依据处理器的系统，能够履行杂乱的操控算法。除了分立操控功用，还集成了人机接口(HMI)、运动操控、实时工业以太网以及数据通讯网关等功用。而由于工业4.0和工业物联网的需求，将来的PLC系统构造将会有进一步的改进。
Programmable logic controller (PLC) is the composition of factory automation and industrial process control. PLC controls various analog / digital sensors and actuators through various interface communications of various protocols. In addition to the control function, PLC can also carry out signal processing and data transformation.
Since its launch, PLC has been greatly developed in terms of structure and function. In terms of structure, due to the demand of factory workshops for more features, accuracy and interconnection, its integration is getting higher and higher. PLC has been turned from industrial PC and PAC (programmable logic active controller) to compact package and micro PLC at that time; In terms of function, today's PLC has turned from a simple input and output controller to a complete system based on the processor, which can perform messy control algorithms. In addition to discrete control functions, it also integrates human-machine interface (HMI), motion control, real-time industrial Ethernet and data communication gateway. Due to the needs of industry 4.0 and industrial Internet of things, the structure of PLC system will be further improved in the future.
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