市場
由于基于PC的控制器被證明可以像PLC一樣可*，并且被操作和維護人員接受，所以，一個接一個的制造商至少在部分生產(chǎn)中正在采用PC控制方案；赑C的控制系統(tǒng)易于安裝和使用，有高級的診斷功能，為系統(tǒng)集成商提供了更靈活的選擇，從長遠(yuǎn)角度看，PC控制系統(tǒng)維護成本低。
由于
可編程控制器(PLC)受PC控制的威脅最大，所以PLC供應(yīng)商對PC的應(yīng)用感到很不安。事實上，可編程控制器(PLC)也加入到了PC控制“浪潮”中。
網(wǎng)絡(luò)向上連是互聯(lián)網(wǎng)問題，向下連是現(xiàn)場總線問題，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/消費者方式、接口軟件采用OPC方式等問題都有待進一步落實。PLC與智能MCC馬達(dá)控制中心、與數(shù)控機床配套的NC/CNC數(shù)控設(shè)備，以及與其它運行控制系統(tǒng)、電控設(shè)備、變頻器和軟起動器等連成系統(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，Emergency Shut Down Systems)的關(guān)系、與立體倉庫、機器人、CAD/CAM等等都要處理好關(guān)系？傊琍LC要兼容各種新技術(shù)，使PLC成為真正意義上的“電腦”。
PLC的應(yīng)用領(lǐng)域是寬闊的，還有許多領(lǐng)域急待開拓，如用于海關(guān)過境車輛認(rèn)證(深圳鹽田)、自動售藥(若干中藥店)在我國已有實例。另外，在離散事件系統(tǒng)中，如公路網(wǎng)交通流(車輛計數(shù)、乘客計數(shù)及停留時間計量)、物流系統(tǒng)、柔行制造系統(tǒng)(敏捷制造系統(tǒng))及一切非標(biāo)準(zhǔn)隨服務(wù)系統(tǒng)中，均可以采用PLC，進而建模和采取對策并優(yōu)化。PLC的前途一片美好，一切悲觀的論點是站不住腳的。至于技術(shù)進步，PLC與其它技術(shù)融合以至消失，那還需要一定的時間!
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