3D04153G03西屋價(jià)格真棒

3D04153G03西屋價(jià)格真棒

DCS是分散控制系統(tǒng)(Distributed Control System)的簡稱，國內(nèi)一般習(xí)慣稱為集散控制系統(tǒng)。它是一個(gè)由過程控制級(jí)和過程監(jiān)控級(jí)組成的以通信網(wǎng)絡(luò)為紐帶的多級(jí)計(jì)算機(jī)系統(tǒng)，綜合了計(jì)算機(jī)(Computer)、通訊(Communication)、顯示(CRT)和控制(Control)等4C技術(shù)，其基本思想是分散控制、集中操作、分級(jí)管理、配置靈活、組態(tài)方便。DCS具有以下特點(diǎn)： (1)高可靠性 由于DCS將系統(tǒng)控制功能分散在各臺(tái)計(jì)算機(jī)上實(shí)現(xiàn)，系統(tǒng)結(jié)構(gòu)采用容錯(cuò)設(shè)計(jì)，因此某一臺(tái)計(jì)算機(jī)出現(xiàn)的故障不會(huì)導(dǎo)致系統(tǒng)其它功能的喪失。此外，由于系統(tǒng)中各臺(tái)計(jì)算機(jī)所承擔(dān)的任務(wù)比較單一，可以針對(duì)需要實(shí)現(xiàn)的功能采用具有特定結(jié)構(gòu)和軟件的計(jì)算機(jī)，從而使系統(tǒng)中每臺(tái)計(jì)算機(jī)的可靠性也得到提高。

流程工業(yè)CIMS是一個(gè)復(fù)雜的綜合自動(dòng)化系統(tǒng)，處理的對(duì)象是整個(gè)企業(yè)的全部生產(chǎn)活動(dòng)，DCS作為一種有效的工具和實(shí)現(xiàn)手段，在流程工業(yè)CIMS中完成重要的基礎(chǔ)控制和實(shí)時(shí)生產(chǎn)數(shù)據(jù)采集、動(dòng)態(tài)監(jiān)控等功能。與管理類計(jì)算機(jī)相比，DCS能夠提供更加可靠的生產(chǎn)過程數(shù)據(jù)，使CIMS系統(tǒng)所作出的優(yōu)化決策也更加可靠。

   從功能上看，流程工業(yè)CIMS中的生產(chǎn)自動(dòng)化系統(tǒng)、動(dòng)態(tài)監(jiān)控系統(tǒng)和在線質(zhì)量控制都可以由DCS實(shí)現(xiàn)。從流程工業(yè)CIMS的層次結(jié)構(gòu)看，DCS主要擔(dān)負(fù)過程控制和過程優(yōu)化任務(wù)，有些生產(chǎn)調(diào)度和生產(chǎn)管理工作也可在DCS上完成。

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