網(wǎng)絡(luò)向上連是互聯(lián)網(wǎng)問題，向下連是現(xiàn)場(chǎng)總線問題，另外現(xiàn)有網(wǎng)絡(luò)能否用以太網(wǎng)“e網(wǎng)到底”方式、網(wǎng)絡(luò)采用客戶器/服務(wù)器方式、瀏覽器/服務(wù)器方式、生產(chǎn)者/消費(fèi)者方式、接口軟件采用OPC方式等問題都有待進(jìn)一步落實(shí)。PLC與智能MCC馬達(dá)控制中心、與數(shù)控機(jī)床配套的NC/CNC數(shù)控設(shè)備，以及與其它運(yùn)行控制系統(tǒng)、電控設(shè)備、變頻器和軟起動(dòng)器等連成系統(tǒng);PLC要與DCS分工合作，充當(dāng)DCS的遠(yuǎn)程I/O站等;PLC要與IPC分工合作，除用IPC作人機(jī)界面外，作軟件PLC的I/O部件也是可行的;此外還有PLC與緊急停車安全系統(tǒng)(ESD，EmergencyShutDownSystems)的關(guān)系、與立體倉庫、機(jī)器人、CAD/CAM等等都要處理好關(guān)系?？傊?，PLC要兼容各種新技術(shù)，使PLC成為真正意義上的“電腦”。
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