因為某個工藝需要,水箱液位需要保持在一定范圍內,當水箱液位出現較大波動且超出此范圍后,可以選擇去現場手動調節(jié)控制水位的閥門,也可以通過DCS發(fā)出指令去調節(jié)。DCS相當于大腦,對眼睛看到的情況(即現場檢測儀表傳輸過來的信號,如水位降低)做出反應(即發(fā)出指令,如增大進水閥開度),現場執(zhí)行設備接受到指令做出相應的動作(如增大進水閥門開度,保持水位在一定范圍)。
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