描述
当定时器线圈T200的驱动输入X000接通时,T200的当前值计数器对10 ms的时钟脉冲进行累积计数,当前值与设定值K123相等时,定时器的输出接点动作,即输出触点是在驱动线圈后的1.23秒(10*123ms=1.23s)时才动作,当T200触点吸合后,Y000就有输出。当驱动输入X000断开或发生停电时,定时器就复位,输出触点也复位。
每个定时器只有一个输入,它与常规定时器一样,线圈通电时,开始计时;断电时,自动复位,不保存中间数值。定时器有两个数据寄存器,一个为设定值寄存器,另一个是现时值寄存器,编程时,由用户设定累积值。
如果是积算定时器,它的符号接线如下图所示:
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