熱風爐外文翻譯

1、 淮 陰 工 學 院畢業(yè)設計(論文)外文資料翻譯學 院：專 業(yè)：姓 名：學 號：外文出處：/xpl/login.jsp?tp=&arnumber=4699149(用外文寫)&url=http%3A%2F%2F%2Fxpls%2Fabs_all.jsp%3Farnumber%3D4699149附 件：1.外文資料翻譯譯文；2.外文原文。指導教師評語： 年月日簽名： （手寫簽名） 注：請將該封面與附件裝訂成冊。附件1：外文資料翻譯譯文基于西門子PCS7的熱風爐控制系統(tǒng)的設計漳龍張.重慶的技術和商業(yè)大學，重慶，4

2、00067，中國（zhoupei）輸變電設備及系統(tǒng)安全與新技術國家重點實驗室 technologychongqing大學，重慶，中國本文介紹的方法利用西門子過程控制系統(tǒng)PCS7 V6.0控制加熱爐。描述了兩者的配置控制系統(tǒng)軟件和硬件，功能通過該系統(tǒng)，隨著困難解決方案。加熱爐控制系統(tǒng)的配置雙CPU冗余。采用工業(yè)以太網(wǎng)，歐洲流行的PROFIBUS DP現(xiàn)場總線和分布式I / O減反射膜結(jié)構(gòu)。它采用ET200M I/O站的冗余。帶PROFIBUS-DP通信接口和節(jié)點具有雙控制器的通信協(xié)議（CPU）。一、介紹在生產(chǎn)過程中的熱軋帶鋼，要求對來料板坯溫度比較高；一般來說，應當是1 350左右。的加熱爐的加

3、熱程序的設備，如能滿足連續(xù)可靠的要求生產(chǎn)只有在控制的溫度和輸出量有很好的協(xié)調(diào)。加熱爐采用可移動的步進梁移動冷板坯的出口側(cè)的輸入時，爐側(cè)；鋼板坯是移動的，它將被加熱的噴嘴噴射爐氣聯(lián)合焦炭爐。當板坯入爐爐體的末端，它首先會被加熱到850左右在預熱段，然后約1300在加熱段；最后將進入熱浸泡部分使板坯加熱均勻滾動。上述控制過程通常通過不斷的PID（比例，積分和差分）。S分別對各控制截面的頂部或側(cè)壁分別收集實際溫度在每節(jié)該爐和再采樣值將被發(fā)送到PLC（可編程邏輯控制器）實現(xiàn)連續(xù)比例，積分和微分（PID控制）通過測量值之間的差異空氣和煤氣流量設定值；然后開度每段的噴槍將調(diào)整控制氣體的流量，溫度控制，然而

4、，因為它不是關于氣體的燃燒清楚，如果這采用的方法是，熱利用效率介質(zhì)的極低、能耗非常大。在這里，一種改進的雙交叉振幅限制全自動燃燒控制進行了介紹和其基本原理是進行控制燃燒的上部和下部各節(jié)在正常工作時間；如有必要，溫度將上部調(diào)整信號可被視為套雙交叉限幅控制和在下部前溫度檢測值可用于爐狀態(tài)監(jiān)測。這一原則主從控制模式可以更好地協(xié)調(diào)在上燃燒和供熱平衡段和下部的燃燒上、下段均勻；同時，它認為天然氣的燃燒，起到了很好的作用節(jié)能。在這個項目中，PCS7 V6.0由西門子將用于實現(xiàn)上述控制功能。二、簡要介紹了PCS7系統(tǒng)PCS7過程控制系統(tǒng)是一種先進的定位系列可編程邏輯控制器和TELEPERM通過西門子結(jié)合最系

5、列機器人系統(tǒng)先進的計算機軟件和硬件技術，采用可更換的操作站，強關系過程控制站與大容量和冗余分布式I/O總線的過程控制系統(tǒng)現(xiàn)場總線技術。PCS7已被應用在越來越多的行業(yè)控制區(qū)作為一種面向過程的軟件開發(fā)平臺。它提出了一種完全集成的自動化解決方案，可以提供所有種類的一個統(tǒng)一的自動化應用技術環(huán)境。以下項目包括它：統(tǒng)一的數(shù)據(jù)管理，通信，配置和編程軟件?；诃h(huán)境以上，各種技術可以集成在一個在相同的全球數(shù)據(jù)庫系統(tǒng)整體界面與用戶。工程師或技術人員可以配置和在同一平臺上的各種應用程序。復雜的工程是通過使用一個簡單的組態(tài)平臺。PCS7使PLC納入DCS系統(tǒng)更容易，體現(xiàn)真正的特征的計算機自動控制。三、簡要介紹熱風爐

6、控制系統(tǒng)在復雜的工業(yè)過程系統(tǒng)，我們總是遇到這樣的問題：多個約束條件的多變量系統(tǒng)：強耦合的非線性系統(tǒng)：大；時間延遲；多目標控制；等等。自定義控件技術無法解決上述問題。但先進控制技術可以很好的解決上述問題。怎么用在工業(yè)過程中應用先進控制技術產(chǎn)生的實用性是一個迫切需要解決的問題工業(yè)自動化研究領域。根據(jù)計算機技術的奔騰，硬件技術，網(wǎng)絡技術，先進控制技術的產(chǎn)業(yè)化技術是可以實現(xiàn)的。本文提出了有用的容易實現(xiàn)可靠的控制方式實現(xiàn)步進式加熱爐自動控制系統(tǒng)，對的基礎上，包括過程控制理論，DCS和PLC技術，通信，現(xiàn)場總線，在步進式加熱的特點爐，采用電氣、儀表控制設備與技術實用、可靠和指標先進。我們可以實現(xiàn)儀表控制系

7、統(tǒng)利用DCS和PLC電氣控制系統(tǒng)?？刂萍訜釥t系統(tǒng)分為加熱爐區(qū)PLC控制系統(tǒng)，PLC控制系統(tǒng)和加熱輥爐DCS控制系統(tǒng)。儀表控制器電氣連接的操作員站服務器IEEE以太網(wǎng)，采用DCS和PLC技術，網(wǎng)絡和現(xiàn)場總線技術相結(jié)合的過程控制系統(tǒng)和過程計算機，智能儀器，實現(xiàn)儀器的驅(qū)動系統(tǒng)在一個系統(tǒng)的電氣控制。四、熱風爐控制系統(tǒng)的組成1.控制系統(tǒng)配置在本文中，基于步進式加熱爐控制過程中，控制系統(tǒng)是一個復雜的傳熱和字符的過程中，有許多特點如干擾，強耦合，大純滯后等我們討論的基礎上的專用控制裝置的設計步進式加熱爐在細節(jié)包括的特點，相關的軟件和硬件信息實現(xiàn)的控制。PID控制是綜合控制規(guī)律儀表控制系統(tǒng)，因為它的成熟，熟悉

8、在技術員和操作工，效果好，廣泛的應用計算機數(shù)據(jù)控制設備，特別是復雜的控制系統(tǒng)，實踐證明它適應各種工業(yè)過程控制。加熱爐的關鍵設備：裝載機機，卸船機，行走系統(tǒng)，系列轉(zhuǎn)換輥，燃燒和跟蹤板控制系統(tǒng)。的蓄熱式加熱爐的控制系統(tǒng)采用雙CPU冗余，冗余環(huán)工業(yè)以太網(wǎng)，Profibus DP總線和分布式I / O減反射膜結(jié)構(gòu)，顯示的詳細配置圖1。利用該系統(tǒng)，可以進行傳輸測量和加權函數(shù)，跟蹤檢測，加載和卸載板，我們可以燃燒和彼此間交換數(shù)據(jù)來控制過程在所有產(chǎn)品線的軌道板和管理過程。加熱爐的生產(chǎn)工藝如高目標產(chǎn)量，低消耗和污染，自動操作模式的實現(xiàn)。2.硬件配置如圖1所示，在整個DCS控制系統(tǒng)加熱爐有兩個顯著的特點：的第一

9、個是基礎自動化級采用冗余環(huán)結(jié)構(gòu)，從而提高可靠性和系統(tǒng)的穩(wěn)定性；第二，信息層采用標準的以太網(wǎng)結(jié)構(gòu)使整個系統(tǒng)的大容量數(shù)據(jù)通信能力和方便的可擴展性。針對上述特點以下模式通過硬件的選擇：（1）選擇過程控制器中cpu414-h由西門子S7-400系列的核心的加熱爐控制系統(tǒng)共同構(gòu)成了冗余系統(tǒng)的控制站與分布I/O ET200M；（2）監(jiān)控系統(tǒng)采用研華工業(yè)控制計算機和菲利普22“純平彩色顯示器工程師站和操作員站。操作該系統(tǒng)的站在形式的在線工作協(xié)調(diào)和他們是全透明、全容錯，實現(xiàn)彼此的更換。這種模式使得本系統(tǒng)有利于可靠操作，數(shù)據(jù)分布合理，操作快捷速度，人機界面友好，使用方便等。（3）三層網(wǎng)絡體系結(jié)構(gòu)的組成標準的以太

10、網(wǎng)（IEEE以太網(wǎng)802。），西門子SIMATIC NET工業(yè)以太網(wǎng)和現(xiàn)場總線過程現(xiàn)場總線（EN50170）保證了高可靠性，無堵塞和高速度（10M 100米）的數(shù)據(jù)尤其是在系統(tǒng)，通信，它采用雙環(huán)容錯光纖網(wǎng)絡，更有效地保證現(xiàn)場抗干擾能力和的網(wǎng)絡的數(shù)據(jù)傳輸可靠性高系統(tǒng)。它采用Windows2000作為微軟（英文）操作系統(tǒng)軟件和PCS7工具集V6.3由西門子將組態(tài)在工程師站作為軟件控制計算機和下位監(jiān)控上位計算機。此外，它是具有工業(yè)以太網(wǎng)s7-redconnect通信軟件和冗余系統(tǒng)軟件。操作員站設置上的位置計算機監(jiān)控軟件pcs7wincc，這是通過西門子和微軟合作開發(fā)。此外，可以通過共同實現(xiàn)的功能監(jiān)控

11、軟件，pcs7wincc可以加入各種控制和C腳本程序，VB程序?qū)崿F(xiàn)更復雜的功能。B.功能的控制系統(tǒng)的實現(xiàn)為了使操作人員掌握操作在計算機控制系統(tǒng)的總體狀況時間，準確的控制系統(tǒng)的穩(wěn)定運行操作方便，本系統(tǒng)建立了系統(tǒng)工藝流程裝配圖，汽包工藝流程圖，加熱段和一個過程的流程圖熱節(jié)。隨著工業(yè)控制參數(shù)的畫面，生動地反映該系統(tǒng)的生產(chǎn)過程的狀態(tài)和提供對檢測點的測量值的顯示系統(tǒng)。此外，該系統(tǒng)還建立了環(huán)顯示圖片和集中控制各回路可在環(huán)圖實現(xiàn)。單擊“詳細信息包括設定值，過程值，輸出值，自動和手動開關，上下限報警過程變量對PID控制面板。模擬數(shù)量顯示值和累積流量的模擬在形式的集中量。溫度計顯示系統(tǒng)的主要參數(shù)。解釋根據(jù)控制系

12、統(tǒng)功能裝載自動運行程序流程。圖2。對加熱爐的燃料混合氣高爐、焦爐，熱值不穩(wěn)定，在以上的溫度控制難度。在這項目，加熱爐的控制方法溫度和煤氣流量和空氣流量級聯(lián)雙交叉限幅方法控制設定值穩(wěn)定在10。具體思路如下：以溫度該加熱爐的主回路，煤氣流和空氣流作為輔助回路，輸出的加熱爐的溫度控制回路將轉(zhuǎn)化為煤氣流的初始設定值空氣流量。在煤氣流量的控制將在高和低的選擇根據(jù)空氣流量將受到限幅根據(jù)高、低限的煤氣流量等確定煤氣流回路最終設定值。的在空氣流量控制將受到高和低根據(jù)煤氣流量的選擇，將受到對限幅根據(jù)較高和較低的空氣流動的限制，確定最終的設定值空氣流動回路。對加熱溫度的控制原理爐，煤氣流量和空氣流量串級雙交叉限幅

13、圖3所示：五、應用中的體會目前現(xiàn)有的高速發(fā)展科學和技術，以提高自動化水平和減少勞動工人的強度，應用計算機和過程控制和監(jiān)測的一些龐大而復雜的過程控制工業(yè)系統(tǒng)軟件已經(jīng)發(fā)展的一個必然趨勢。在編程的過程中，強PCS7控制流程圖的作用（CFC）使程序員可以方便、快速。唯一的不足是有模塊的參數(shù)太多的選項，在的情況下，一個恰到好處的PID模塊，可以滿足需要控制可以開發(fā)，規(guī)劃將更便捷、完善的。WinCC喇叭進行語音報警功能配置更容易和更快。這僅僅是必要的記錄*。wav文件的語音報警和連接在喇叭功能的語音報警和報警事件。在WinCC和Step7股票組合的上位機監(jiān)控和一些職責收集現(xiàn)場數(shù)據(jù)合理，發(fā)揮各自的不同的設施

14、優(yōu)勢，而應該是計算機的設計特點和前景控制系統(tǒng)。在系統(tǒng)調(diào)試過程和放投入運行，硬件設備的診斷功能PCS7是強大的，他們可以幫助現(xiàn)場調(diào)試工程師解決問題快?？刂泼姘宓男畔?nèi)容全面。在PID參數(shù)的整定過程，可以觀察在PV值和OP值和現(xiàn)場操作者改變可以操作的循環(huán)相關參數(shù)，節(jié)省開發(fā)人員的時間的量大。參考文獻：1.西門子PCS7用戶手冊，銀，20032.西門子公司配置硬件和通信。連接PCS7 V6.0手冊，20023.jaklic安東。在鑄坯傳熱模擬運輸J，應用熱工程，2002，4.荷蘭足球的發(fā)展和計算機在線控制性能在一個三區(qū)加熱爐J，鋼鐵工程師1982,59（1），44-52.5.弗萊德shenvar內(nèi)陸。

15、在步進梁式加熱爐監(jiān)控80熱連軋機J，鋼鐵工程師，1987,64（3），23日至24日6.圖瓦E，瓦斯奎斯f.real-time現(xiàn)場總線通信中的應用PROFIBUS網(wǎng)絡。7.B.波特，A.瓊斯遺傳調(diào)諧數(shù)字PID控制器。電子信件，1992，vol.28:843-8448.j.l.tong，j.p鮑勃。數(shù)字PID控制器的設計模型工業(yè)電子，控制，儀器儀表和自動化，1992國際會議的程序，1992，第3卷：1157-11629.Y. Huang，s.yasunbu。一般的PID實用設計方法從傳統(tǒng)的PID控制。第九屆IEEE國際會議上，2000，vol.2:969-97210.保羅哈蒙。等。專家系統(tǒng)工具和

16、應用程序，約翰威利和sons.inc，世界圖書出版公司，199011.等k J，低t.pid控制器：理論，設計與調(diào)整。紐約：ISA，199512.Mann G K I G，輪轂，高斯林R G.分析直接作用模糊PID控制器結(jié)構(gòu)。IEEE交易對系統(tǒng)，人，與控制，1999，29b：371-38813.西門子ag.simatic微機用戶手冊Z。2000。14.過程控制系統(tǒng)PCS7圖書館siemensag，2003。15.PCS7過程contro1system操作員站。siemensag，200316.標準的PID控制手冊siemensag，200317.軟件冗余或SIMATIC S7-300和S7-4

17、00。siemensag，200318.波爾圖理工學院，報告hurray-tr-98031998,4a特m L?，F(xiàn)場總線控制系統(tǒng)。ISA.附件2：外文原文（復印件）The Reheating Furnace Control System Design Based On SIEMENS PCS71Pei Zhou, 2Wei He, 2Zhanglong Zhang1. Chongqing Techology and Business University, Chongqing, 400067, China( zhoupei)2. State Key Laboratory of Power Tr

18、ansmission Equipment & System Security and New TechnologyChongqing University,Chongqing,ChinaAbstractThis paper introduces that the method of using Siemens process control system PCS7 V6.0 to control the reheating furnace. It describes the configuration of both software and hardware of control syste

19、m, function accomplished by the system and the difficulties along with solution. The reheating furnace control system is configurated with double CPU redundancy. It adopts industrial Ethernet , Europe popular PROFIBUS DP field bus and distributed I/O ET200M structure. It adopts ET200M I/O station re

20、dundancy communication interface and node with PROFIBUS DP protocol to communicate with double controller(CPU).I INTRODUCTIONIn the production process of hot mill strip, the requirement on the temperature of incoming slab billet is relatively high; generally speaking, it shall be 1 350 or so. Thereh

21、eating furnace, as the equipment for reheating procedure, can meet the requirements on continuous reliable production only when the control over the temperature and the output quantity are well coordinated. The reheating furnace adopts moveable walking beam to move the cold slab billet to the exit s

22、ide from the furnace enter side; whenthe slab billet is moving, it will be heated by the combination gas of burner nozzle injection furnace and coke furnace. When the slab billet enters the furnace from the tail end of the furnace body, firstly it will be heated to 850 or so in the preheating sectio

23、n and then to about 1300 in the reheating section; finally it will enter the heat soak section to make the slab billet be heated evenly for rolling.The above-mentioned control process is commonly accomplished by DCS (digital control system) of the instruments and the routine control strategy is to r

24、ealize it through continuous PID (proportion, integral and differential). Several thermocouples are arranged respectively on the top or side wall of each control section to respectively gather the actual temperature in each section of the furnace and then the sampling values will be sent to PLC (pro

25、grammable logic controller) so as to realize the continuous proportion, integral and differential control (PID control) via the difference between the measured values and the set value of gas and air flow; then the opening degree of the burner gun in each section will be adjusted to control the flow

26、 of gas so as to control the temperature, however, since it is not clear about the combustion of the gas, if this method is adopted, the utilization efficiency of heat medium is very low and the energy consumption is very large. Here one kind of improved dual-crossing amplitude limiting full-auto co

27、mbustion control will be introduced and its basic principle is to carry out the control over combustion at the upper part and lower part of each section in normal working time; if necessary, the temperature adjustment signal of the upper part can be regarded as the set control of the dual-crossing a

28、mplitude limiting loop and the former temperature detection value of the lower part can be used for monitoring the furnace condition. This principal and subordinate control mode can better coordinate the balance of combustion and heat supply between the upper section and lower section to make the co

29、mbustion of the upper and lower section even; at the same time, it considers the combustion of gas, playing a good role in energy-saving. In this project, PCS7 V6.0 developed by Siemens will be used to realize the above-mentioned control function.II BRIEF INTRODUCTION TO PCS7 SYSTEM PCS7 is an advan

30、ced process control system orientated to all process control applications based on S5, S6 and S7 series programmable logic controller and TELEPERM series cyborg system by Siemens combining with the most advanced computer software and hardware technology, which adopts replaceable operation station, s

31、trong relational distributed database support platform, highly-reliable process control station with large capacity redundancy and distributed I/O control sub-system of PROFIBUS process field bus technology. PCS7 has been applied in more and more industry control areas as a kind of procedure-oriente

32、d software development platform. It has advanced a sort of completely-integrated automatic solution and can provide Authorized licensed use limited to: UNIVERSIDAD ROSARIO. Downloaded on May 18,2010 at 20:00:01 UTC from IEEE Xplore. Restrictions apply. all kinds of automation applications with a uni

33、form technical circumstance. The following items are included in it: unified data management, communication, configuration and programming software. Based on the circumstance above, all kinds of technologies can be integrated in a overall system with a global database on the same interface with user

34、s. Engineers or technicians can configurate and program in the same platform for all kinds of applications. The complicated engineering becomes simpler by using a configuration platform. The PCS7 makes the PLC incorporated in the DCS system more easily, embodying the genuine characteristics of the c

35、omputerized automatic control.III BRIEF INTRODUCTION TO CONTROL SYSTEM OF REHEATING FURNACEIn the complex industrial process system，we always meet such problems :multiple constraint conditions: multi variable system: strong coupling; nonlinear system: large time delay; multi control target; and so o

36、n. Custom control technique can not solve above problems. But advanced control technique can deal well with those problems. How to use advanced control technique in industrial process and generate practical utility is a urgent problem in the industrial automate research realm. According as the gallo

37、ping of computer technique，hardware technique, network technique，industrialization of advanced control technique is realizable. This article put forward the useful and easily-realizable and reliable control way to realize the automatic control system of walking reheating furnace，on the basis of incl

38、uding the theory of process control， technology of DCS and PLC，communication，field bus， and in term of the characteristic of the walking reheating furnace, also by using the electrical and instrument control equipment with the practical and reliable technology and advanced quota. We can realize the

39、instrument control system and electric control system by using DCS and PLC. The control system of reheating furnace is divided into furnace area PLC control system，roll PLC control system and reheating furnace DCS control system. The controller of instrument and electric connect to the server of the

40、 operater station by the IEEE Ethernet，by using DCS and PLC，the technology of network and field bus technology to combine the process control system and process computer ， intelligent instruments，drive system to realize the instrument and electric control in one system.IV COMPOSITION OF CONTROL SYST

41、EM OFREHEATING FURNACEA. Configuration Of Control SystemIn this article，based on walking reheating furnace controlling process，control system is a complicated transmit heat and character process，has many peculiarity such as disturb，strong coupling，great pure lag etc. We discuss the design of dedicat

42、ed control equipment of basis walking reheating furnace in detai1 including characteristic，correlative soft and hardware information and realization of control. PID control is are comprehensive controlling rule in meter controlling system，because of its mature, familiarity in technician and operator

43、, well effect，broad appliance in computer DDC data controlling equipment and especially complicated controlling system，practice proved it adapt various industrial controlling process. The key equipment of the reheating furnace: loader machine，unloader machine，walking system，series transfer roll，cont

44、rol system of burning and tracking of slab. The whole control system of the reheating furnace is configurated with double CPU redundancy, redundancy ring industrial Ethernet, PROFIBUS DP bus and distributed I/O ET200M structure, with the detailed configuration shown inFig 1.Make use of the system，we

45、 can carry out the function of transferring measuring and weighting ，detecting，loading and unloading tracking the slab，we can control process of burning and exchange data each other to track slab and manage the process over all of product line.Goals of reheating furnaces producing process such as hi

46、gh yield，low consuming and pollution，automatic operating mode are achieved.A.1 Hardware configurationShown as Fig. 1, the whole DCS control system of the reheating furnace has two remarkable characteristics: the first one is that the basic automation level adopts redundancy ring structure so as to i

47、mprove the reliability and stability of the system; the second one is that the information level adopts standard Ethernet structure to make the whole system large capacity data communication ability and convenient extensibility. Aiming at the above-mentioned characteristics the following modes will

48、be adopted to select the hardware:(1)Selecting the process controller CPU414-H in S7-400 series made by Siemens as the core of the whole control system of the reheating furnace to jointly form the redundancy system control station together with distributed I/O ET200M;(2)The monitoring system adopts

49、YANHUA industrial control computer and Philip 22” pure-flat color display as the engineer station and operator station. The operation stations of the system are working in form of online and coordination and they are full-transparent and full fault-tolerant, realizing the replacement with each other

50、. This mode makes this system advantageous in reliable operation, reasonable data distribution, quick operation speed, friendly man-machine interface and convenient use and so on.(3)The three-level network system structure composing of standard Ethernet (IEEE Ethernet 802.X), SIEMENS SIMATIC NET ind

51、ustrial Ethernet network and PROFIBUSAuthorized licensed use limited to: UNIVERSIDAD ROSARIO. Downloaded on May 18,2010 at 20:00:01 UTC from IEEE Xplore. Restrictions apply. process field bus (EN50170) guarantees the high reliability, no blockage and high speed (10M100M) of the data communication of

52、 the system, especially, it adopts double-ring fault-tolerant optical fiber network, more effectively guarantee the field anti-interference ability andhigh reliability of the data transmission of the network system.A.2 Software configurationIt adopts Microsoft WINDOWS2000 (English) as the operating

53、system software and PCS7 TOOL SET V6.3 made by Siemens will be configurated on engineer station as the software to control the lower-position computer and monitor the upper-position computer. In addition, it is provided with Industry Ethernet S7-REDCONNECT communication software and redundancy H sys

54、tem software.The operator station is provided with upper-position computer monitoring software PCS7WinCC, which is cooperatively developed by Siemens and Microsoft. Besides the functions that can be realized by the common monitoring software, PCS7WinCC can be added with various controls and C script

55、 program, VB program to accomplish more complicated functions.B. Functions accomplished by control systemIn order to make the operators master the operation condition of the whole control system of the computer in time, accurately control the stable operation of the system and convenient in operatio

56、n, this system establishes system process flow assembly drawing, steam drum process flow chart, process flow chart of reheating section and the one ofheat section. The process flow chart is the process flow display picture with industrial control parameters, vividly reflecting the production process

57、 state of this system and providing the display of the measured values of the detection points of the system. In addition, this system also establishes the loop display picture and the centralized control over each loop can be realized in the loop picture. Click the detailed information including se

58、t value, process value, output value, manual and auto switch and upper and lower limit alarm of the process variables on the PID control panel. The analog quantity displays value and flow accumulation of the analog quantity in form of centralization. The thermometer displays the main temperature parameters of the system. Functions of control system is explained according to program flow of loading automatic running. Fig.2C. Difficulties and realizationThe fuel for the reheating furnace is the mixed gas of b