ABSTRACT
For a long time, PLC offers wide range of automation equipments with very reliable control applications. At the same time, with the development of technology and enlarge scale of productive system, multi-motor synchronous system is widely applied in modem industrial production.
This article describes the application of PROFIBUS SIMATIC S7-300 PLC, configure the hardware of the Auto Assembly Line in STEP7, study the theory of PROFIBUS, analysis the Protocols and message structure of PROFIBUS-DP define blocks of PLC and tags of SIMATIC, design LAD language and SIMATIC script Programs, drawing every Paddles of the Auto Assembly Line in STEP7, in addition an analysis of interference on the system, putting forward a feasible method to improve.
The purpose of this study is to design a S7-300 based on induction motor control system. This control system include the design of PLC controlling system, the design of inverters, relay and motor system. The study of field-bus Protocols will promote the realization of PROFIBUS communications. The method proposed in the paper is promising and can be applied in many industrial control environments.
Keywords: PLC Inverters Induction Motor PROFIBUS Anti-jamming