廈門市泰尼電器有限公司
主營產品: AB模塊PLC |
廈門市泰尼電器有限公司
主營產品: AB模塊PLC |
參考價 | 面議 |
PLC控制和DCS控制系統不是一個邏輯層次上的概念,從名稱上就能看出:PLC是以功能命名,DCS是以體系結構命名。從原理上看 PLC就可以組成DCS。當然兩者性能差異還是存在的,要具體看產品和需要。從應用角度來說,簡單地以 PLC,DCS來區分,往往會走人誤區。
DCS控制系統與PLC控制區別: DCS是一種“分散式控制系統",而 PLC(可編程控制器)只是一種控制“裝置",兩者是“系統"與“裝置"的區別。系統可以實現任何裝置的功能與協調,PLC裝置只實現本單元所具備的功能。
DCS網絡是整個系統的中樞神經,DCS系統通常采用的標準協議 TCP/IP。它是安全可靠雙冗余的高速通訊網絡,系統的拓展性與開放性更好.而 PLC因為基本上都為單個小系統工作,在與別的PLC或上位機進行通訊時,所采用的網絡形式基本都是單網結構,網絡協議也經常與標準不符。在網絡安全_匕 PLC沒有很好的保護措施。
1746-NI8--1746-NI8
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