據蘇州新寧自來水公司總工陶維峰說，停水是不能接受的，“即便是兩個小時也不行，”他說，這就意味著他們在尋找供應商和添加新的設施。蘇州新寧自來水公司注重產品的性能質量。尤其是，公司需要能夠提供終可靠性的控制解決方案--當然還包括靈活性和可擴展性。

陶維峰先生還強調系統安裝的速度。“工程延期不僅增加建造成本，而且供水不足也會影響到蘇州新區自身的發展”

一系列與控制系統相關的挑戰也接二連三的出現了。控制解決方案需要實現城市中主要水處理廠和20公里遠處的太湖抽水站的通信連接。而且，為了防止所發生的任何停工，蘇州新寧水處理廠需要具有控制系統冗余。

另一個挑戰在于新建的水處理廠中的員工對水處理操作知識甚少或者根本沒有經驗，這就意味著控制系統必須直觀而且易于使用。 
 

解決方案：

基于羅克韋爾自動化在水處理行業廣泛的經驗以及公司產品質量的良好信譽，蘇州新寧水處理廠選中了基于Allen-Bradley技術的控制解決方案。與系統集成商上海遠東科技公司以及蘇州新寧水處理公司一起，羅克韋爾自動化制造解決方案小組為新的水處理廠開發了一套高度自動化的解決方案，充分采用了其“集成體系結構”技術。

自來水公司新控制系統基于四個Allen-Bradley PLC-5 控制器。其中三個控制器位于自來水公司的蘇州水處理廠，并且通過大流量全冗余控制網通信網絡相連接。*個PLC控制著化學處理廠，在化學處理廠要完成加鋁凝聚、氯化以及加鈣中和。第二個PLC監視著關鍵的過濾過程。這里，在水處理廠的核心有10個獨立的SLC-500連接到PLC-5，分別控制著10個獨立的V形過濾器中水的平衡和運行情況。 據陶維峰先生說，這一階段是自動化系統重要的部分，因為這些根本不能實現手動控制。同時，由于這一處理過程至關重要，所以要確保每個過濾器都具有的SLC，以提供一定程度的冗余......
 

 
  
 
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