Design Of Autocontrol System Of Ingredient Process

As the development of control science, electron and telecommunication technology,the traditional ingredient control system can not go well with the trend of intelligentizationand informationization. To improve the precision and robustness of traditional PVCproduction and control system from the update of processes of a main producer of PVCgloves, here, it is designed that however advance the automization level of the ingredientcontrol system and some key technology on improving the quality of ingredient.Firstly, some features on process flow and control system of PVC ingredient wasanalyzed, meanwhile, some key points determining the quality of ingredient was studied.So not only a reasonable solution is designed to improve the precision of ingredient, solidweighing and temperature autocontrol, but also the type selection, methods of installationand ways of control of some important hardware were mentioned according to therequirements of actual application in project.Secondly, traditional PLC control system in which the mainly electrical controlcabinet installed in control room are away from the location equipment is installed usuallyneeds a mass of cable that is linked between the I/O modules of PLC control system andremote devices installed in the work location. In addition, in the traditional PLC controlsystem the signals between the main controller and the distributed devices are digitalon/off of24voltage or analog of4~20mA sensitive to disturbance. Given the shortageabove, here a distributed control system using bus communication protocol is constructedat the time of a control method brought forward based on profibus.By putting the I/O modules near by the local devices the shortages of analog remotetransmission are getted over, the workload of laying out cable is reduced obviously.Finally, this paper describes the solid and liquid proportioning control system design.