MDD112D-N-030-N2M-130-PA0新PAC兼具PC功能和PLC可靠性發(fā)布時(shí)間：12-11-25 來源： 點(diǎn)擊量：47035 更多
PAC的含義
PAC這一術(shù)語，它定義了一種新類型的控制器。該控制器結(jié)合了PC的處理器、RAM和軟件的優(yōu)勢(shì)，以及PLC固有的可靠性、堅(jiān)固性和分布特性。PAC采用現(xiàn)有的商業(yè)化技術(shù)(COTS)，非常適合于工業(yè)化環(huán)境，它具有可伸縮性，易于維護(hù)和具有較低的發(fā)生故障時(shí)間等特性。
1、 開發(fā)可編程自動(dòng)控制器(PAC)是發(fā)展的必然
10多年前當(dāng)Internet處于起步階段，基于PC的儀器還沒有出現(xiàn)，那時(shí)PLC
MDD112D-N-030-N2M-130-PA0占領(lǐng)了整個(gè)自動(dòng)化領(lǐng)域。即使是今天，那些使用數(shù)字I/O進(jìn)行簡(jiǎn)單控制的工程師雖然感到PLC是他們最好的選擇。但如果考慮到要使PLC增加視覺、運(yùn)動(dòng)、儀器和分析功能等全方位的自動(dòng)化領(lǐng)域，那只有新一代可編程自動(dòng)控制器(PAC -Programmable Automation Controlle)才有可能會(huì)逐漸占領(lǐng)。這是當(dāng)今設(shè)計(jì)與建立控制系統(tǒng)發(fā)展的需要。
MDD112D-N-030-N2M-130-PA0眾所周知，設(shè)計(jì)與建立控制系統(tǒng)放時(shí)，工程師們總是希望能使用比較少的設(shè)備來實(shí)現(xiàn)更多的功能。尤為當(dāng)今，他們需要的控制系統(tǒng)不僅能處理數(shù)字I/O和運(yùn)動(dòng)，而且還可以集成用于自動(dòng)化監(jiān)控和測(cè)試的視覺功能和模塊化儀器，同時(shí)還必須能實(shí)時(shí)地處理控制算法和分析任務(wù)，并把數(shù)據(jù)傳送回企業(yè)。也就是說，工程師們希望同時(shí)擁有PC的功能和PLC(可編程控制器)的可靠性，而可編程自動(dòng)控制器(PAC-Programmable Automation Controlle)就是這樣的平臺(tái)，它能最佳結(jié)合PC和PLC兩者的優(yōu)勢(shì)(見圖1所示)，它提供了開放的工業(yè)標(biāo)準(zhǔn)，可擴(kuò)展的領(lǐng)域功能，一個(gè)通用的開發(fā)平臺(tái)和一些高級(jí)性能。是工業(yè)自動(dòng)化領(lǐng)域中比較完善的新興控制器。
MDD112D-N-030-N2M-130-PA0那“PAC是什么?” 它有什么特征和優(yōu)勢(shì)， 值此本文將從PAC的多個(gè)方面特征與PLC對(duì)比中分折出優(yōu)勢(shì)。為此，先述PAC是什么。
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