Design And Research Of Complicated Process Control Experimental Projects Based On S7-300 PLC

Process control is an important professional course for automation and related majors,with both theoretical and practical characteristics.In order to enable students to better understand the relevant theories and methods of process control and to solve complex engineering problems,we must actively promote the development of process control experiment teaching.However,at present,many schools lack experimental teaching of process control courses,which leads to serious disconnection from practice and is not suitable for the development of related engineering majors.At the same time,the Ministry of Education has issued relevant documents to actively promote the reform of new engineering and engineering education.Therefore,in order to actively explore new engineering research and practice,and promote the certification of engineering education in our school,this paper based on the actual research of the school,the S7-300PLC-based process control experimental platform is perfected and the complex process control is developed.experimental project.The work of the thesis is mainly divided into the following three aspects:?.Improvement of process control experimental platform based on S7-300PLCThe overall design scheme of the experimental system,the water tank experimental device and its control system are introduced in detail,and the inadequacies of the experimental system are described.In view of the deficiencies in the design of the original process control experimental system,the hardware and software of the water tank experimental system were improved.The hardware device solved the problem of the hardware coil time lag disappeared,the analog module common mode interference,etc.,and the experimental system was redesigned on the software.The main program,data acquisition subroutine,and improve the PC screen.?.Design of Complex Process Control Physical Experiment ProjectAccording to the requirements of the process control syllabus,the complex process control experimental project was continued on the basis of the process control experimental system.Three complex process control experimental design principles and experimental design methods were elaborated.The experimental results and anti-interference performance were analyzed.The corresponding process control experiment instruction book has been carefully designed.The process control experiment instruction book includes the experiment purpose,equipment,content,steps,experiment report and thinking questions,which enables the students to fully grasp the experimental principle and improve their ability to solve practical problems.?.Design of Complex Process Control Simulation Experiment and Semi-hardware Simulation Experiment ProjectThe MATLAB simulation software is embedded in the process control experimental platform,and the simulation experiment project and the semi-physical simulation experiment project are designed and developed.The simulation experiment project is simple and rapid simulation by establishing the simulation model,so that the students can understand the theory of the process control system and the controlled object.Features have a deeper understanding.Supporting design simulation experiment instruction book and semi-physical simulation experiment instruction book,and comparing and analyzing different types of experimental items under the same experimental conditions.This paper summarizes the shortcomings of the original process control experimental system,on which the system software and hardware are upgraded and upgraded,and the complex process control experimental project and corresponding experimental instruction book are developed.The experimental system can carry out physical experiments,integrate simulation software in the experimental system,can carry out digital simulation experiments,and can carry out semi-physical simulation experiments based on experimental devices and simulation software,and realize comparative analysis of the three.Combined with the actual situation of the school,the process control experimental system can solve the school's demand for the process control experimental system and improve the students' ability to solve problems,thus solving the problems of "information-oriented engineering practice and single talent training mode" in engineering education in colleges and universities.Relevant undergraduate professional certification and new engineering professional construction provide examples of laboratory construction.