描述
输入的灵敏度当输入电压电流小于各厂家对PLC的输人端电压和电流的规则,如当输入回路串有二极管或电阻(不能彻底发动),或许有并联电阻或有漏电流时(不能彻底堵截),就会有误动作,形成灵敏度降低,对此应采纳办法。当输入器材的输入电流大于PLC的最大输入电流时,也会引起误动作,应选用弱电流的输入器材,而且选用输入为共漏型输入的PLC。
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