一個(gè)或若干PLC P0922VV控制模塊FBM216 與PC機(jī)聯(lián)出體系,PC機(jī)起到原編程器及人機(jī)界面操作站的作用,這20世紀(jì)90年代的新潮流,這么為體系集成帶來(lái)了商機(jī),一同編程軟件和人機(jī)界面軟件(監(jiān)控軟件或稱組態(tài)軟件)及軟件接口(或稱驅(qū)動(dòng)軟件)也得到了展開(kāi)。
這些年,PLC廠家在正本CPU模板上供給物理層RS232/422/485接口的根底,逐漸添加了各種通訊接口,而且供給完好的通訊網(wǎng)絡(luò)。因?yàn)榻跀?shù)據(jù)通訊技能展開(kāi)很快,用戶對(duì)敞開(kāi)性請(qǐng)求很激烈,現(xiàn)場(chǎng)總線技能及以太網(wǎng)技能也同步展開(kāi),所以PLC構(gòu)成的PCS體系比DCS的敞開(kāi)性地點(diǎn)的現(xiàn)狀稍好一些。如今羅克韋爾AB公司已構(gòu)成了多層構(gòu)造體系,即Ether Net、Control Net、Device Net及Asi等現(xiàn)場(chǎng)總線(原DH+網(wǎng)也可兼容)。西門子公司在Profibus-DP通訊網(wǎng)絡(luò)及Profibus-FMS網(wǎng)絡(luò)以外,提出了S7 Routing網(wǎng)絡(luò),即Profibus-DP和Industrial Enternet兩層構(gòu)造。網(wǎng)絡(luò)還在展開(kāi),中國(guó)應(yīng)已積極的姿勢(shì)投入其間。PAC的含義P0922VV控制模塊FBM216
PAC這一術(shù)語(yǔ),它界說(shuō)了一種新類型的操控器。該操控器聯(lián)絡(luò)了PC的處理器、RAM和軟件的優(yōu)勢(shì),以及PLC固有的牢靠性、鞏固性和散布特性。PAC選用現(xiàn)有的商業(yè)化技能(COTS),十分適合于工業(yè)化環(huán)境,它具有可伸縮性,易于保護(hù)和具有較低的發(fā)作毛病時(shí)刻等特性。
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