介绍了状态元件，状态转移图和步进顺控指令的基本概念以及在VMGC100超精机电气系统设计中的应用方法。
This paper introduces the basic concepts of states, State Procedure and Step Ladder Instruction and its application method in designing VMGC100 electric system.
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。
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.
通过使用可编程控制器中的专用脉冲输出指令和高速计数器，实现了对辐照仪步进电机的精确控制。
The accuracy control of the motors in Gamma-ray irradiation of blood is realized by means of the inner pulse output code and the high-speed counter in PLC.
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