The advantage function in PLC is stepping sequence control, the efficiency method of establishment the stepping sequence control program is drawing out the function diagram.
步进顺序控制是可编程序控制器的优势功能，编制步进顺序控制程序的有效方法是画出功能表图。
The paper described the collectivity function characteristic and several important components of movement controller, for example main control program, interpolation module and velocity control.
这里论述了运动控制器的总体功能特性，并分别介绍了运动控制器的几个重要组成部分，如主控程序、插补模块及速度控制等。
Function pointer alias and control flow analysis are difficulties in the course of program analysis, and reasons why the accuracy of program analysis are decreased.
函数指针分析及控制流分析是程序分析中的难点，也是引起分析的精确度降低的原因。
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