RELANCE 0-60021-4 伺服驅(qū)動(dòng)器
查看監(jiān)控畫面的數(shù)據(jù)
出現(xiàn)以下情況時(shí)，說明控制系統(tǒng)發(fā)生問題，應(yīng)立即通知微機(jī)維修人員維修，同時(shí)操作工到現(xiàn)場(chǎng)進(jìn)行處理。
（1） 經(jīng)常變化的數(shù)據(jù)長(zhǎng)時(shí)間不變，且?guī)讉€(gè)數(shù)據(jù)或所有數(shù)據(jù)都不變。
?。?） 控制分組畫面中，手動(dòng)自動(dòng)無法切換，或手動(dòng)輸入數(shù)據(jù)后，一經(jīng)確認(rèn)，又恢復(fù)為原來的數(shù)據(jù)，修改不過來。
（3） 趨勢(shì)圖畫面中，幾條趨勢(shì)都為直線不變。
?。?） 監(jiān)控畫面中，多個(gè)數(shù)據(jù)同時(shí)波動(dòng)較大。
判斷波動(dòng)數(shù)據(jù)是否為工藝上相關(guān)參數(shù)，若是相關(guān)參數(shù)則通知儀表及微機(jī)人員檢查，看是否某調(diào)節(jié)系統(tǒng)波動(dòng)引起相關(guān)參數(shù)變化，同時(shí)將相關(guān)調(diào)節(jié)系統(tǒng)打到手動(dòng)狀態(tài)，必 要時(shí)到現(xiàn)場(chǎng)進(jìn)行調(diào)節(jié)。如水溶液全循環(huán)裝置中，尿素合成塔壓力正常時(shí)為l9．67MPa，如果突然大范圍波動(dòng)，此時(shí)勢(shì)必引起下游的中壓系統(tǒng)、低壓系統(tǒng)壓力波 動(dòng)，這種情況是由于幾個(gè)相關(guān)參數(shù)中某一參數(shù)波動(dòng)引起其他參數(shù)變化，并不是控制系統(tǒng)本身故障。
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。
DCS系統(tǒng)故障判別及處理方法：隨著自動(dòng)化水平的提高，DCS控制系統(tǒng)（集散控制系統(tǒng)）逐漸代替 了常規(guī)儀表，其優(yōu)越性已被廣大操作人員所接受。但發(fā)生故障時(shí)，會(huì)造成裝置停車甚至事故，各種故障如何及早發(fā)現(xiàn)及恰當(dāng)處理就顯得非常重要。我公司合成氨工藝 使用多套浙大中控JX-300XDCS進(jìn)行控制，控制穩(wěn)定可靠，針對(duì)存在的一些問題，根據(jù)多年維護(hù)經(jīng)驗(yàn)，我們總結(jié)出了一套行之有效的故障判別及處理方法。
The control function is complete, and the control algorithm is rich, integrating continuous control, sequential control, and batch control. It can achieve advanced control such as cascade, feedforward, decoupling, adaptive, and predictive control, and can easily add special control algorithms as needed. The composition of DCS is very flexible, which can be composed of dedicated management computer stations, operator stations, engineer stations, recording stations, on-site control stations, and data acquisition stations, as well as general servers, industrial control computers, and programmable controllers. The process control level at the bottom level is generally achieved through scattered on-site control stations, data acquisition stations, etc. to collect and control data on site, and transmitted to the production monitoring level computer through a data communication network.
A small or micro specialized computer with simple and convenient maintenance, which is easy to maintain and has a single function. When a local or specific computer malfunctions, it can be replaced online without affecting the operation of the entire system, quickly eliminating the problem.
Coordination: Various data is transmitted between workstations through communication networks, and the entire system information is shared and coordinated to complete the overall functions and optimization processing of the control system.
Flexibility is achieved through configuration software to configure software and hardware according to different process application objects, namely determining measurement and control signals and their interconnection relationships, selecting applicable control laws from the control algorithm library, and calling basic graphics from the graphics library to form various monitoring and alarm screens required, thus conveniently forming the required control system.