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【简答题】
当增计数器的计数输入端(CU)有一个计数脉冲的上升沿(由OFF到ON)信号时,增计数器被启动,计数值加1,计数器作递增计数,计数至最大值( )时停止计数。当计数器的当前值等于或大于设定值(PV)时,该计数器位被( )。
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