【正文】 環(huán)式活性污泥系統(tǒng)系統(tǒng)（ CASS）處理廢水。 CASS池主反應(yīng)區(qū)的工程，按照 “ 曝氣，閑置，沉淀，和潷水器 “ 的循環(huán)過程。 為了確保污水處理系統(tǒng)運行，主站和 PLC 從站是獨立的。兩臺服務(wù)器的待機彼此共同執(zhí)行監(jiān)測任務(wù)。 A. S7300和 WinCC之間的溝通 PLC 和 PC 機通過工業(yè)以太網(wǎng)相互通信， PLC 的傳輸通過光纖到 PC 機的配置軟件的實時數(shù)據(jù)庫的實時生產(chǎn)數(shù)據(jù)。 TCP/ IP 網(wǎng)絡(luò)協(xié)議，是事實上的 IT 標(biāo)準(zhǔn)有關(guān)通信協(xié)議服務(wù)。 PROFIBUS，國際化和開放的，不依賴于標(biāo)準(zhǔn)現(xiàn)場總線的設(shè)備制造商。處理器西門子 S7300 PLC 模塊， CPU 3152 PN / DP的，它有其自己的 PROFIBUS 接口。西門子 PLC 的點至點的通信鏈路通過通訊模塊 CP341 的發(fā)電設(shè)備。MODBUS 網(wǎng)絡(luò)可以連接多個上一條線，每個設(shè)備的設(shè)備可以設(shè)置通訊地址本身。 在另一個 網(wǎng)絡(luò)，有轉(zhuǎn)換的 MODBUS 消息幀和封裝結(jié)構(gòu)協(xié)議。 該項目的 PLC 系統(tǒng)包含三個 機架 ，主要機架與擴(kuò)展機架 IM360/361 傳達(dá)。 6 PC Conitoring 系統(tǒng)組成 以中國版本的 系統(tǒng)配置軟件實現(xiàn)， 監(jiān)督 外觀配置功能。 2）顯示功能：顯示設(shè)備的運行狀態(tài)，通過控制圖形和動畫，顯示該領(lǐng)域的實時運行參數(shù)設(shè)備。定時打印，事件觸發(fā)打印和打印方式，可分為用戶定義的打印。程序流程圖如圖 5 所示。然后，控制計劃被列為遠(yuǎn)程手動控制和遠(yuǎn)程自動控制，可以通過兩種方式之間的切換標(biāo)志位。 8 結(jié)論 在污水處理中使用的自動化系統(tǒng)是值得推廣的，因為它能滿足現(xiàn)代污水處理的要求，減少日常的一天維護(hù)管理，降低污水處理成本，并確保運行和出水的水質(zhì)。 浙江工業(yè)大學(xué)教科學(xué)院 畢業(yè)設(shè)計外文資料翻譯 設(shè)計 題目： 龍門刨床刨臺運動模擬器的設(shè)計 學(xué)生姓名： 學(xué) 號： 專 業(yè)： 外文出處： Communications in Computer and Information Science, 1, Volume 216, Advances in Computer Science, Environment, Ecoinformatics, and Education, Pages 552556 指導(dǎo)教師： 2020 年 2 月 12 日 Research on Virtual Experiment System on PLC Education Based on Teaching Materials Abstract. This paper presents virtual models of virtual experiment system, which are employed in the process of education of programmable logic controller (PLC) programming. Within control laboratory, the virtual models appear as wellsuited alternate to physicalmechanical or process control model, whose feasibility, in laboratory conditions, is sometimes plicated. As we do both, the development and employment of virtual models, the paper includes approach to virtual models development, description of some of them as well as our experience of their usage. At the end, the possibility of remote connection to laboratory equipment is discussed. Keywords: Programmable logic controller (PLC), supervisory control and data acquisition (SCADA), Virtual Model, Mathematical Model. 1 Introduction Modern automated systems typically use programmable logic controllers to orchestrate and coordinate the plants being automated. Clearly there is a great need for engineers with strong skills and knowledge in this area. But there are many challenges in teaching PLC programming to students. Although the PLC is often covered in undergraduate automation courses, many educational institutions lack resources to help students to bee proficient PLC users [1]. Disadvantages of traditional labs include the need for a qualified teacher, the demand on institutional space, time constraints on the students and on the safety problems, recurring maintenance, etc. Experimental laboratories, however, represent a significant investment of both funds and space, which schools may not be able to meet [2, 3]. Technologies are needed to help instructors to make the most of limited resources. Luckily some of these can be solved by PLC simulation software. PLC simulation software can be divided into two categories which are Virtual PLC and Virtual Environment. Virtual PLC is the emulation package for PLC programming software. Virtual PLC, used with corresponding controller, lets users run and debug the application code while at puter. The leading engineering panies usually provide the Virtual PLC. CXSimulator is a tool that functions as a virtual Omron PLC. S7PLCSIM allows users to simulate the operation of a Siemens S7 PLC and users can test control programs with S7PLCSIM without connecting to S7 hardware. RSLogix Emulator 5000 is a software simulator for the Allen Bradley line of Logix 5000 controllers. But the customer has to purchase the corresponding simulator software product of the same manufacturer in order to gain access to all functions and options of the PLC in real experiment. Virtual Environment is a functional ladder logic design and PLC simulation software program that incorporates the basic functions used in PLC ladder programming. Virtual Environment functions include inputs, outputs, timers, counters and registers. Some Virtual Environments perform the simulation of the control program, and the plant model visualizer shows the corresponding plant model reflecting the changing states of the virtual system during the PLC simulation. It bees much easier for users to verify the PLC program through the plant model visualizer [4]. But the verified program is not easy to transplant into the real PLC system, because different PLCs have different program language. In PLC education, the virtual experiment system needs the seamless connectivity to the main PLCs. It is hard to develop PLC drivers in experiment system. Virtual PLC and Virtual Environment have weakness of connectivity to real PLC system. Connectivity to plant devices is key to PLC education. The virtual experiment system must maximize students’ choices with the broadest possible munication options for industrial automation and information devices. SCADA software provides the largest selection of connectivity options to hundreds of PLCs and other hardware devices. SCADA software makes device integration for seamless connectivity to any PLC. The objective of this paper is to propose a virtual experiment system that enables to connect different types of PLCs. The virtual experiment system employs a virtual plant model consisting of virtual devices, so that students can easily corroborate the real PLC program to control that virtual model. The virtual experiment system is built on SCADA software. 2 Overview of the Virtual Expe