描述
如果需要在定时器的线圈“通电”时就动作的瞬动触点，可以在定时器线圈两端并联一个辅助继电器的线圈，并使用它的触点。
通用定时器没有保持功能，在输入电路断开或停电时被复位。FX系列的定时器只能提
供其线圈“通电”后延迟动作的触点，如果需要在输入信号变为OFF之后的延迟动作，可以使用图3–1l所示的电路。
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