【導(dǎo)讀】益，現(xiàn)場總線標(biāo)準(zhǔn)始終不能統(tǒng)一。通過多次投票、協(xié)商，2020年1月宣布的現(xiàn)場總線國。際標(biāo)準(zhǔn)IEC61158將八種總線同時列為國際。標(biāo)準(zhǔn)，形成一個妥協(xié)的結(jié)果。作性只能在同一種總線標(biāo)準(zhǔn)下實現(xiàn)，不同標(biāo)準(zhǔn)總線之間仍然受到限制。TCP/IP協(xié)議的以太網(wǎng)。成，把現(xiàn)有的企業(yè)資源ERP改造成為基于WEB的應(yīng)用系統(tǒng)。目前工業(yè)自動化已從單機。設(shè)備層聯(lián)接檢測設(shè)備和執(zhí)行機構(gòu)；控制層從現(xiàn)場設(shè)備取得數(shù)據(jù)，完成各種控制，監(jiān)測運行參數(shù)，報警和歷史趨勢。由于各子系統(tǒng)及各現(xiàn)場設(shè)備通訊協(xié)議是多樣化的，這兩種集成模式都要開發(fā)網(wǎng)關(guān)，以實現(xiàn)協(xié)議的轉(zhuǎn)換和統(tǒng)一，這樣加大了系統(tǒng)集成技術(shù)的復(fù)雜性，提高了成本。的概念因此被提出。嚴(yán)格的情況下，可以稱之為局域網(wǎng)，也就是以太網(wǎng)。CSMA/CD最早是由CSMA改進(jìn)而來。被檢測到，便停止發(fā)送該幀，放棄自已的幀。高的控制系統(tǒng)，這種不確定性將造成信息不能按要求傳遞。同一網(wǎng)段上受到CSMA/CD. 服務(wù)器都處于等待狀態(tài)而無法運行。兩個工作群組要分割原有網(wǎng)絡(luò)寬帶，一

　　

【正文】 rks and TCP / IP protocol. Network security is the ultimate concern of the transmission work in the application layer of information security。 it is not illegal changes to use. Protect the security of information transmission and either two ways: exclusive and independent access encrypted information. Before a way to let the lack should not be, the latter should not be the way to get the do not know. Ether virtual private work switching technology has bee a basic work dedicated channel technology, already very mature and widely used. Ether can easily access will require isolation from. Inter information is encrypted TCP / IP on the basic nothing to do with the application of information processing methods. Prior to the issue of information is encrypted with information to carry out the use of declassified after treatment. Now basically an open encryption algorithms, do not rely on secret encryption guarantees, but by password (key). Information security key to the final and most important factor is the holder of the password。 he kept using the password of course, and means the security munication system is the core. 20 6 Industrial Ether in the Intelligent Building of the Gallery (1) ENC2020IP Industrial Ether Control System Beijing Building Automation Engineering Centre (Centre for the Beijingcontrolled buildings) using ENC2020IP Industrial Ether monitoring and control system to a quarter of the 15 highrise residential distribution charge, heat exchangers, heating, ventilation, water, fire, the three Table checkspeaking six subsystems and building remote monitoring, and achieve better results. ENC Industrial Ether control system box shown in Figure 6. ENC these parameters control module can be intelligent building systems integrated into the Ether, elevator systems, fire alarm and other traditional equipment, with RS232 or RS485 interfaces, respectively received ENCTRS200 and ENCTRS400 conversion module integrated into the gateway to Inter too, IP phones and IP cameras can be integrated directly into the Ether. In addition also provides CDMA / GRPS wireless gateway interface, such as the police information system through the gateway interface can be sent directly to the phone, mobile phone and the system control. AI: Analog Input Module (ENC AI) DI: Digital Input Module (ENC DI) AO: analog output module (ENC AO) DO: digital output module (ENC DO) FI: Pulse Input Module (ENC FI) FO: Pulse Module (ENC FO) Network Data Management System: the bottom of the equipment realtime data management. WEB: pletion of the entire system of operational control. Local control centre: local control is actually the browser (Broswer) through the browser, the system can be monitored. Remote workstations: in fact remote monitoring browser (Broswer) through the Inter browser on a surveillance system (2) ENC parameters of integrated modules ① Function ? Embedded WEB SEVER, through the browser directly monitor calibration configuration。 ? Customer certification function。 21 ? embedded firewall functions。 ? support SOCKET munication protocols。 ? improve the TCP / IP protocol。 ? 10/100baset the IEEE standard Ether interfaces. ② Hardware architecture: from the central processing unit MCU, Ether cards, sensors, actuators, I / O interfaces, and memory (edrive), power ponents. ③ System architecture: embedded WEB SEVER, with the client (Browser) munication, as shown in Figure 8. (3) ENC System features ① Information work to achieve reunification and control work Cancellation control work and information work boundaries and control information. ENC all equipment parameters through integrated module or integrated directly into the Ether interface on, ENC parameter control module is a web server, embedded WEB server. ② a work management control services Central control centre is a main server to control the parameters of integrated modules can be centralized or distributed processing of data through the parameters of various types of integrated modules plete control requirements. ③ System is simple, convenient and flexible work, expansion of maintenancefriendly The system via Ether integrated, intelligent building LAN is indispensable, these modules can use LAN nearest wall, do not have to rewiring, the required devices are standardized, convenient and flexible work, expansion of maintenancefriendly. ④ Control system will be upgraded to the service system The system runs through the concept of a service, the equipment will be upgraded to control external equipment to provide information services. This could be the target of human services, but also for the machines. With the construction of large equipment to provide excellent services, intelligent building will bee a collection of intelligent service system, which is expected by the people. 22 23 7 Conclusions Since the 1990s, industrial Ether control work to replace a try, there are many successful cases. Industrial Ether as the core to the monitoring and control technologies in the field of monitoring is an important development direction, but in fact when, reliability, security, interoperability and other needs further study and improve.