描述
电池后备非积算定时器没有,在定时过程中,若遇停电或驱动定时器线圈的输入断开,定时器内的脉冲计数器将不保存计数值,当复电后或驱动定时器线圈的输入再次接通后,计数器又从零开始计数.
积算定时器由于有锂电池后备,当定时过程中突然停电或驱动定时器线圈的输入断开,定时器内的计数器将保存当前值,在复点火驱动定时器线圈的输入接通后,计数器继续计数直至计数值与设定值相等。
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