140DA084210

DCS系統是封閉式系統，各公司產品基本不兼容。而FCS系統是開放式系統，不同廠商、不同品牌的各種產品基本能同時連入同一現場總線，達到較佳的系統集成。
DCS系統的信息全都是二進制或模擬信號形成的，必須通過D/A與A/D轉換。而FCS系統將D/A與A/D轉換在現場一次表完成，實現全數字化通信，使精度得到大的提高，可提高到0.1%。并且FCS系統可以將PID閉環控制功能裝入現場設備中，縮短了控制周期，提高運算速度，從而改善調節性能。
DCS它可以控制和監視工藝全過程，對自身進行診斷、維護和組態。但是，由于自身的致命弱點，其I/O信號采用傳統的模擬量信號，因此，它無法在DCS工程師站上對現場儀表（含變送器、執行器等）進行遠方診斷、維護和組態。FCS采用全數字化技術，數字智能現場裝置發送多變量信息，而不僅僅是單變量信息，并且還具備檢測信息差錯的功能。FCS采用的是雙向數字通信現場總線信號制。因此，它可以對現場裝置（含變送器、執行機構等）進行遠方診斷、維護和組態。
FCS由于信息處理現場化，與DCS相比可以省去相當數量的隔離器、端子柜、I/O終端、I/O卡件、I/O文件及I/O柜，同時也節省了I/O裝置及裝置室的空間與占地面積。同時，FCS可以減少大量電纜與敷設電纜用的橋架等，同時也節省了設計、安裝和維護費用。
FCS相對于DCS組態簡單，由于結構、性能標準化，便于安裝、運行、維護。

現在FCS系統被廣泛的應用，那么，PLC與DCS前景又將如何。
PLC于20世紀60年代末期在美國首先出現，目的是用來取代繼電器，執行邏輯、計時、計數等順序控制功能，建立柔性程序控制系統

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廈門興潤星貿易有限公司，我們是一家專業銷售**性的工業自動化產品與數控產品的企業。 DCS集散式控制系統,PLC可編程控制器,等各大品牌都有著強大價格的優勢。本著“質量*一、服務*”為宗旨，竭誠為您服務。

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