基于硬件组态的时间中断要求在到达设置的日期和时间时，用Q4.0自动启动某台设备。具体如下：硬件组态：打开CPU属性中的“时刻中断”选项卡，设置执行启动设备的日期和时间，执行方式为“一次”。生成OB10，编写OB10程序如下，设置时间到时，将需要启动的设备对应的输出点置为1：OB1程序：用I0.0将Q4.0复位2）用SFC控制时间中断除了在硬件组态功能中设置和时间中断外，也可以在用户程序中调用SFC来设置和时间中断，在OB1调用SFC31来查询中断状态，读取的状态用MW16保存。
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