YIN Jin-song1，SU Lei1，HUANG Xiao-hua2，SUN Song-li1

（1. Taizhou Institue of Science and Technology，Nanjing University of Science and Technology，

Taizhou 225300，China；

2. School of Mechanical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China）

Abstract：Aiming at the characteristics of high control requirements and a large number of control object in Modern stage control system，as well as the problems of the traditional relay stage control system such as automatic positioning difficulties，high failure rate，the heavy maintenance and etc，combining the development and characteristics of fieldbus technology，the control strategy and application of the real-time dynamic control on the modern stage equipment were presented，which is to the touch screen as man-machine interface，S7-300PLC as the control core，through the Profibus fieldbus control AC variable frequency speed regulation system based on MDX61B converter to achieve. Several applications and system control methods in modern stage control system were provided，which is based on Profibus fieldbus and AC variable frequency speed regulation system of MDX61B converter. The results indicate that the centralized control for the dispersion function unit is realized through the fieldbus technology，the system has a fast dynamic response，high reliability and economy of the superior characteristics. On the development and research of modern stage control technology has a certain reference

value.

Key words：Profibus technology；touch screen；PLC；frequency control；electrical control systems