改变了继电器控制系统中机械式的鼓形控制器或凸轮控制器步数和输出点数有限、体积大、重量大、成本高的缺点。
It changes the disadvantage that drum or CAM controller in relay control total steps, output points are limited, large volume and weight, high costing.
本文采用GE -I系列可编程控制器（PLC）的计数器来模拟鼓形控制器，由于用软件来实现，因此编程、修改灵活方便，而且总步数和输出点数可以满足所有场合的需要。
GE-I Series PLC is used to simulate drum controller in this paper. Because of implement with software, it is easy to modify program, and its total steps, output points can be used in all conditions.
本文采用GE -I系列可编程控制器（PLC）的计数器来模拟鼓形控制器，由于用软件来实现，因此编程、修改灵活方便，而且总步数和输出点数可以满足所有场合的需要。
GE-I Series PLC is used to simulate drum controller in this paper. Because of implement with software, it is easy to modify program, and its total steps, output points can be used in all conditions.
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