注意上述第2-6步不可用到Series 90 Micro PLC中,有关Micro PLC的通电和断电顺序参考第五章系统操作的“通电和断电顺序”(GFK-1065)。时钟与定时器由系列90-30 PLC所提供的时钟与定时器含有一耗时时钟、一日历时钟(331,340/341,351/352和28点Micro)、–监控器计时器和一恒定扫描定时器。两类定时器功能模块包括一个上电延时定时器和起动-复位定时器。四个定时器触点循环通-断,间隔分别为0.01

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