品牌:施耐德 | 規格:140DAO84000 | 材質:140DAO84000 |
產地:法國 |
140DAO84000
140DAO84000
140DAO84000
一個或若幹PLC與PC機聯出係統,PC機起到原編程器及人機界面操作站的作用,這20世紀90年代的新潮流,這樣為係統集成帶來了商機,同時編程軟件和人機界面軟件(監控軟件或稱組態軟件)及軟件接口(或稱驅動軟件)也得到了發展。
近年來,PLC廠家在原來CPU模板上提供物理層RS232/422/485接口的基礎,逐漸增加了各種通訊接口,而且提供完整的通訊網絡。由於近來數據通訊技術發展很快,用戶要求很強烈,現場總線技術及以太網技術也同步發展,所以PLC構成的PCS係統比DCS的開放性所處的現狀稍好一些。目前羅克韋爾AB公司已形成了多層結構體係,即Ether Net、Control Net、Device Net及Asi等現場總線(原DH+網也可兼容)。西門子公司在Profibus-DP通訊網絡及Profibus-FMS網絡以外,提出了S7 Routing網絡,即Profibus-DP和Industrial Enternet兩層結構。網絡還在發展,我國應已積極的姿態投入其中。
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