工業(yè)4.0時代，企業(yè)數(shù)字化轉型與智能制造成大勢，自動化水平的日益提高，工業(yè)互聯(lián)網(wǎng)的迅速發(fā)展交織著IT(信息技術)、OT(運營技術)與CT(通訊技術)三條主線的加速融合?？删幊踢壿嬁刂破?PLC)作為OT以及工業(yè)自動化關鍵設備以及工業(yè)互聯(lián)網(wǎng)底層的重要組件，也隨之得到了巨大的進步。同時，由于設備、機器和工廠變得“更智能”，工業(yè)現(xiàn)場控制對PLC以及DCS等設備提出了更高的要求。智造“先行兵”，PLC助力工業(yè)控制實現(xiàn)自動化眾所知周，PLC 是在傳統(tǒng)的順序控制器的基礎上引入了微電子技術、計算機技術、自動控制技術和通訊技術而形成的新一代工業(yè)控制裝置，目的是用來取代繼電器、執(zhí)行邏輯、計時計數(shù)等順序控制功能，建立柔性的編程控制系統(tǒng)。目前，PLC 在傳統(tǒng)功能的基礎上增加了模擬量運算、PID 功能、通信功能以及更可靠的工業(yè)抗干擾技術等功能，廣泛應用于工業(yè)生產(chǎn)的各個領域。因此PLC可簡單理解為一種用于特定工業(yè)環(huán)境下的計算機，并具備多種優(yōu)良性能，其硬件結構與計算機基本相同，具備CPU、I/O 模塊、電源模塊、底板、外設以及通信聯(lián)網(wǎng)設備，采用了可編程的存儲器對邏輯運算、順序控制、計時計數(shù)和算數(shù)運算進行存儲，并通過數(shù)字的、模擬的輸入輸出指令控制各種類型的工業(yè)生產(chǎn)過程。與通用的計算機相比，PLC 在工業(yè)領域的使用場景多、適應面廣，并具備可靠性高、抗干擾能力強和編程簡單等優(yōu)點。

In the era of industry 4.0, the digitalization transformation and intelligent manufacturing of enterprises have become a general trend. The increasing level of automation and the rapid development of industrial Internet are intertwined with the accelerated integration of it (Information Technology), OT (operation technology) and CT (Communication Technology). Programmable logic controller (PLC), as the key equipment of OT and industrial automation and an important component of the bottom of industrial Internet, has also made great progress. At the same time, as equipment, machines and factories become "more intelligent", industrial field control puts forward higher requirements for PLC, DCS and other equipment. It is well known that PLC is a new generation of industrial control device formed by introducing microelectronics technology, computer technology, automatic control technology and communication technology on the basis of traditional sequential controller. Its purpose is to replace the sequential control functions such as relay, executive logic, timing and counting, and establish a flexible programming control system. At present, on the basis of traditional functions, PLC adds analog calculation, PID function, communication function and more reliable industrial anti-interference technology, which are widely used in various fields of industrial production. Therefore, PLC can be simply understood as a computer used in a specific industrial environment, and has a variety of excellent performance. Its hardware structure is basically the same as that of the computer. It has CPU, i/o module, power module, backplane, peripherals and communication networking equipment. Programmable memory is used to store logic operations, sequence control, timing and counting and arithmetic operations, and through digital Analog input and output instructions control various types of industrial production processes. Compared with general-purpose computers, PLC has many application scenarios and wide adaptability in the industrial field, and has the advantages of high reliability, strong anti-interference ability and simple programming.