3D04153G07西屋
3D04153G07西屋
DCS經過多年的發展，積累了大量的高級算法模塊。例如NETWORK6000+具有的設備級模塊，在一個模塊中集中完成了面向設備的基本控制和故障報警功能，在網絡通訊中也已此模塊為單位進行傳遞，大大提高了軟件開發的效率。一個設備極模塊相當于0.5K的梯形圖邏輯量，PLC要完成同樣的功能，就要煩瑣得多了。
在下載修改、運行調試、遠程診斷方面，PLC缺乏解決方案。而DCS從一設計之初就是從系統需要的角度出發的，有著多年積累的完善的解決方案。以NETWORK6000+DCS為例，系統既可以在線修改控制策略，也可以在線下載控制策略，修改和下載過程中，對系統的正常運行沒有影響。NETWORK6000+DCS有完善的虛擬DCS功能，不但可以用于組態邏輯的驗證，而且能夠構建成完整的虛擬DCS與模型相連，完成系統的仿真調試。NETWORK6000+DCS具有完善的安全措施，提供基于廣域網的遠程調試方案。
在網絡方面,DCS網絡是整個系統的中樞神經，和利時公司的MACS系統中的系統網采用的是雙冗余的100Mbps的工業以太網，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因為基本上都為個體工作，其在與別的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。在網絡安全上，PLC沒有很好的保護措施。我們采用電源,CPU,網絡雙冗余.
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