Under the control of the microcomputer this system not only can automatically determine the optimal control pulse sequence of the step motor, but also can control the step motor optimally.

在微机的控制下，该系统既能自动确定步进电动机的最优控制脉冲序列，又能对步进电动机实施最优控制。

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The paper introduces a method of establishing model using mark flow graph in sequence control system. Then the control is implemented by step-by-step instruments in PLC.

本文介绍了一种标识流图在顺序控制系统中建模方法，然后利用可编程序控制器中的步进指令实现控制。

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