描述
PP845 3BSE042235R1
打印系統(tǒng)的工作原理是:各個(gè)打印機(jī)廠商生產(chǎn)的打印機(jī)都有與WINDOWS操作系統(tǒng)相聯(lián)的驅(qū)動(dòng)程序。而原DCS的大部分操作站的操作系統(tǒng)是專用的,它們只有特殊幾種打印機(jī)的驅(qū)動(dòng)程序。市場上常用的打印機(jī)它們沒有驅(qū)動(dòng)程序,所以是連不上的。實(shí)際上,打印系統(tǒng)軟件的任務(wù)是編寫WINDOWS操作系統(tǒng)的反驅(qū)動(dòng)軟件,就是使DCS操作站來的信號(hào)能在WINDOOWS環(huán)境下識(shí)別。然后通過WINDOWS的驅(qū)動(dòng)程序去連接常用的打印機(jī)。打印系統(tǒng)軟件要識(shí)別不同的數(shù)據(jù)格式,因?yàn)樵B接不同型號(hào)的DCS操作站的打印機(jī)有它們自己的數(shù)據(jù)格式,如ANSI格式、IBM格式等,在打印系統(tǒng)連接到操作站之前,弄清它的數(shù)據(jù)格式,使這種數(shù)據(jù)格式在WINDOWS環(huán)境下工作。打印系統(tǒng)軟件應(yīng)編寫`多種數(shù)據(jù)格式的反驅(qū)動(dòng)軟件。另外,打印圖形和打印文本的軟件差別很大。僅打印文本,其軟件比較簡單,打印圖形比較復(fù)雜。比如采用HP打印機(jī)打印圖形,首先弄清是點(diǎn)陣格式還是頁掃描格式。大部分Hp打印機(jī)是頁掃描方式,軟件要解釋PCL指令,打印機(jī)就能打印操作站屏幕上的圖形。如果不是HP打印機(jī),就要解釋別的指令。隨著測控技術(shù)的迅速發(fā)展,DCS控制系統(tǒng)得到了越來越廣泛的應(yīng)用,特別是近來海上平臺(tái)石油生產(chǎn)采用計(jì)算機(jī)監(jiān)控系統(tǒng)實(shí)現(xiàn)綜合自動(dòng)化生產(chǎn)也日趨廣泛。由于所處的生產(chǎn)環(huán)境惡劣,設(shè)備易腐蝕、易老化,故障發(fā)生率高,因此,DCS系統(tǒng)必須具有強(qiáng)大的故障自診斷與安全保護(hù)等功能。當(dāng)生產(chǎn)中出現(xiàn)不可預(yù)見的干擾和故障時(shí),系統(tǒng)能及時(shí)做出反應(yīng)并發(fā)出報(bào)警信息,而系統(tǒng)所采集的各工控?cái)?shù)據(jù)是診斷與解決故障的基礎(chǔ)。因此,DCS系統(tǒng)內(nèi)設(shè)的與各工控參數(shù)相對(duì)應(yīng)的報(bào)警限值對(duì)整個(gè)石油生產(chǎn)的安全性、可靠性均有著極其重要的作用。科技的發(fā)展必然會(huì)促進(jìn)平臺(tái)石油生產(chǎn)工藝的不斷改進(jìn)以及生產(chǎn)設(shè)備的不斷更新,所以各工控參數(shù)的報(bào)警限值也必須根據(jù)新工藝、新設(shè)備以及新的工藝要求作適當(dāng)修改。因此,DCS系統(tǒng)必須對(duì)工控參數(shù)報(bào)警限值實(shí)現(xiàn)有效的管理。事實(shí)上DCS系統(tǒng)的開發(fā),多采用可靠性高、組態(tài)靈活且易于生成應(yīng)用程序的組態(tài)軟件來具體實(shí)現(xiàn)。在多數(shù)情況下,系統(tǒng)開發(fā)人員根據(jù)系統(tǒng)開發(fā)時(shí)生產(chǎn)過程的運(yùn)作情況為各工控參數(shù)設(shè)置具體的報(bào)警上下限值。當(dāng)系統(tǒng)中某工控參數(shù)的報(bào)警限值需要作修改時(shí),開發(fā)人員通常將DCS系統(tǒng)退回到系統(tǒng)開發(fā)用組態(tài)軟件的編輯狀態(tài),然后再對(duì)該工控參數(shù)的報(bào)警限值做修改。這樣會(huì)使得監(jiān)控系統(tǒng)在某工控參數(shù)報(bào)警限值被修改的時(shí)間段內(nèi)不能對(duì)工控過程進(jìn)行實(shí)時(shí)監(jiān)控,若此時(shí)工控過程出現(xiàn)異常情況,將會(huì)對(duì)生產(chǎn)造成一定程度的影響。因此,實(shí)現(xiàn)工控參數(shù)報(bào)警限值的在線管理對(duì)海洋平臺(tái)石油生產(chǎn)的安全運(yùn)行意義重大,刻不容緩,各DCS系統(tǒng)廠家任重而道遠(yuǎn)。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價(jià)格,大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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