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计数器(C)
FX2N中的16位增计数器,是16位二进制加法计数器,它是在计数信号的上升沿进行计数,它有两个输入,一个用于复位,一个用于计数。每一个计数脉冲上升沿使原来的数值减1,当现时值减到零时停止计数,同时触点闭合。直到复位控制信号的上升沿输入时,触点才断开,设定值又写入,再又进入计数状态。
其设定值在K1~K32767范围内有效。
设定值K0与K1含义相同,即在次计数时,其输出触点就动作。
通用计数器的通道号:C0~C99,共100点。
保持用计数器的通道号:C100~C199,共100点。
通用与掉电保持用的计数器点数分配,可由参数设置而随意改。
由计数输入X011每次驱动C0线圈时,计数器的当前值加1。当*10次执行线圈指令时,计数器C0的输出触点即动作。之后即使计数器输入X011再动作,计数器的当前值保持不变。
l当复位输入X010接通(ON)时,执行RST指令,计数器的当前值为0,输出接点也复位。
l应注意的是,计数器C100~C199,即使发生停电,当前值与输出触点的动作状态或复位状态也能保持。
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