DS3800DSQD1A1A 选择放心 诚信交易

DS215UCIAG1AZZ05A
DS215UCVAG3AD
DS215UDSAG1AZZ01A
DS200UDSAG W FIRMWARE
DS215UPLAG1BZZ01A
IS200BPIAG1A
IS200CABPG1B
IS200CPFPG1A
IS200DRLYH1A
IS200DSFCG1A

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描述

利用定时器与计数器级联组合可以扩大延时时间,如图5-13所示。图中T4形成一个20s的自复位定时器,当X4接通后,T4线圈接通并开始延时,20s后T4常闭触点断开,T4定时器的线圈断开并复位,待下一次扫描时,T4常闭触点才闭合,T4定时器线圈又重新接通并开始延时。所以当X4接通后,T4每过20s其常开触点接通一次,为计数器输入一个脉冲信号,计数器C4计数一次,当C4计数100次时,其常开触点接通Y3线圈。可见从X4接通到Y3动作,延时时间为定时器定时值(20s)和计数器设定值(100)的乘积(2000s)。图中M8002为初始化脉冲,使C4复位。

DS3800DSQD1A1A 选择放心 诚信交易

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