【正文】 按鈕、限制的交換機(jī)和光電傳感器都是提供一個(gè)離散的信號(hào)的設(shè)備。 (3)可編程控制器自我測(cè)試功能，如看門狗定時(shí)器，輸出都關(guān)閉時(shí)檢查故障。因此，應(yīng)用保險(xiǎn)絲保護(hù)輸出設(shè)備。 第三， I/O 接線端子 輸入連接 (1)輸入連接通常不應(yīng)超過(guò) 30 米。 空氣應(yīng)避免腐蝕和易燃?xì)怏w的含量 ,比如氫氯化物、硫化氫、等?更在空氣中的灰塵或腐蝕性氣體環(huán)境可以安裝在一個(gè)封閉的可編程序控制器 (PLC)控制好房間或控制柜，并安裝空氣凈化設(shè)備。因此網(wǎng)絡(luò)自動(dòng)化系統(tǒng)集成項(xiàng)目的重要性越來(lái)越重要，甚至引起了網(wǎng)絡(luò)是控制器的觀點(diǎn)的爭(zhēng)論。 電源 PLC 可編程序控制器 (PLC)的電源模塊提供電源集成電路。 輸入輸出接口電路（ I/O 模塊） PLC 與電氣回路的接口，是通過(guò)輸入輸出部分（ I/O）完成的。等所有的用戶程序執(zhí)行完畢之 后，最后將 I/O 映像區(qū)的各輸出狀態(tài)或輸出寄存器內(nèi)的數(shù)據(jù)傳送到相應(yīng)的輸出裝置，如此循環(huán)運(yùn)行，直到停止運(yùn)行。隨著硬件迅速變得更強(qiáng)大和更便宜， RTU、 PLC 和 DCS 正在越來(lái)越多地開始有重疊 ，職責(zé)，并與 PLC 許多供應(yīng)商的特點(diǎn)類似， RTU 反之亦然。 可編程序控制器廣泛用于 運(yùn)動(dòng)控制、定位控制和轉(zhuǎn)矩控制 。另外一方面在批量生產(chǎn)貨物的情況 下自定義的控制系統(tǒng)是 組成、成本較低的最佳選擇， 而不是一個(gè)非反復(fù)出現(xiàn)工程費(fèi)用 “ 普通 ” 的解決方案。但是現(xiàn)有的軟件工程設(shè)計(jì)方法，卻不一定適用于 PLC 的軟件設(shè)計(jì)領(lǐng)域，因?yàn)?PLC 的編程需要同時(shí)考慮硬件和軟件因素。 PLC 的發(fā)明者理查德 .，盡管硬件價(jià)格在不斷地下降，但是客觀地估計(jì) PLC產(chǎn)業(yè)的市場(chǎng)價(jià)值將達(dá)到 50 億美元。 可編程控制器對(duì)用戶來(lái)說(shuō)，是一種無(wú)觸點(diǎn)設(shè)備，改變程序即可改變生產(chǎn)工藝。以執(zhí)行邏輯判斷、計(jì)時(shí)、計(jì)數(shù)等順序控制功能。 if the surrounding Stresses above 55 ℃ , to install electric fan forced ventilation. 2. PLC humidity in order to ensure the insulation performance, air relative humidity should be less than 85% (no condensation). 3. PLC should be made from a strong shock vibration source, to prevent the vibration frequency of 10 ~ 55Hz frequent or continuous vibration. When the environment is inevitable when using vibration, shock absorption to take measures, such as glue, such as using shock absorption. 4. Air to avoid corrosion and flammable gases, such as hydrogen chloride, hydrogen sulfide, etc.. The more the air of dust or corrosive gas environment can be installed in a closed PLC good control room or control cabi, and install air cleaning devices. 5. Power PLC power supply is 50Hz, 220 (1 177。 where processes required hundreds or thousands of loops, a distributed control system (DCS) would instead be used. As PLC has bee more powerful, the boundary between DCS and PLC applications has bee less distinct. PLC has similar functionality as Remote Terminal Units. An RTU, however, usually does not support control algorithms or control loops. As hardware rapidly bees more powerful and cheaper, RTU, PLC and DCS are increasingly beginning to overlap in responsibilities, and many vendors sell RTU with PLClike features and vice versa. The industry has standardized on the IEC 611313 functional block language for creating programs to run on RTU and PLC, although nearly all vendors also offer proprietary alternatives and associated development environments. 2 The structure of PLC system Structurally divides, PLC divides into the stationary type and the bined type (module type) two kinds. Stationary PLC including the CPU board, the I/O board, demonstrated the kneading board, the memory block, the power source and so on。 晉 中 學(xué) 院 本科畢業(yè) 設(shè)計(jì) 英文參考資料 題 目 Programmable Logic Controller PLC 院 系 機(jī)械學(xué)院 專 業(yè) 機(jī)械設(shè)計(jì)制造及其自動(dòng)化 姓 名 黨佳明 學(xué) 號(hào) 1014312109 學(xué)習(xí)年限 2020 年 09 月至 2020 年 07 月 指導(dǎo)教師 王 麗珍 職稱 講師 申請(qǐng)學(xué)位 工學(xué) 學(xué)士學(xué)位 2020年 05月 20日 1 英文 原文： Programmable Logic Controller PLC 1 PLC Introduce PLC Introduction Programmable controller is the first in the late 1960s in the United States, then called PLC programmable logic controller (Programmable Logic Controller) is used to replace relays. For the implementation of the logical judgment, timing, sequence number, and other control functions. The concept is presented PLC General Motors and the basic design is the puter functional improvements, flexible, generic and other advantages and relay control system simple and easy to operate, such as the advantages of cheap prices bined controller hardware is standard and overall. According to the practical application of target software in order to control the content of the user procedures memory controller, the controller and connecting the accused convenient target. In the mid1970s, the PLC has been widely used as a central processing unit microprocessor, import export module and the external circuits are used, largescale integrated circuits even when the PLC is no longer the only logical (IC) judgment functions also have data processing, PID conditioning and data munications functions. International Electro technical Commission (IEC) standards promulgated programmable controller for programmable controller draft made the following definition: programmable controller is a digital electronic puters operating system, specifically for applications in the industrial design environment. It used programmable memory, used to implement logic in their internal storage operations, sequence control, timing, counting and arithmetic operations, such as operating instructions, and through digital and analog input and output, the control of various types of machinery or production processes. Programmable controller and related peripherals, and industrial control systems easily linked to form a whole, to expand its functional design. Programmable controller for the user, is noncontact equipment, the procedures can be changed to change production processes. The programmable controller has bee a powerful tool for factory automation, widely popular replication. Programmable controller is useroriented industries dedicated control puter, with many distinctive features. 2 ① high reliability, antiinterference capability。 these elements bine not a dismountable whole. Module type PLC including the CPU module, the I/O module, the memory, the power source module, the ledger wall or the rack, these modules may defer to certain rule bination disposition. CPU constitution CPU is the PLC core, plays nerve center39。 10%) V AC, for the power cord to the interference, PLC itself has sufficient capacity to resist. Reliability requirements for high power interference is particularly serious situation or environment, you can install a sh