A20B-9001-0610/02A--福州卓凱
A20B-9001-0610/02A--福州卓凱
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福州卓凱電子科技有限公司
電話；0591-62182558
熱線；15205082707（程工）
QQ：340135333
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PLC是現(xiàn)代工業(yè)的三大支柱之一，是可靠性高、應(yīng)用非常廣泛的工業(yè)控制產(chǎn)品。在中大型模塊化的PLC產(chǎn)品中，CPU模塊（中央處理器）是PLC的中心。一些重大的工業(yè)生產(chǎn)線往往要求連續(xù)運行不能停頓，而可靠性再高的PLC也不能保證故障為零，因此，雙CPU的冗余控制是一種滿足連續(xù)生產(chǎn)要求、提高系統(tǒng)可用性的有效手段。下面以熔鹽爐自控系統(tǒng)為實例詳述雙CPU冗余控制的實現(xiàn)方法。
可編程控制器的輸入接線是指外部開關(guān)設(shè)備PLC的輸入端口的連接線。輸出接線是指將輸出信號通過輸出端子送到受控負(fù)載的外部接線輸入輸出設(shè)備：用于永久性地存儲用戶數(shù)據(jù)，如EPROM、EEPROM寫入器、條碼閱讀器，輸入模擬量的電位器，打印機(jī)等
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