Applications Of PLC Based Advanced Process Control In The Tomato Sauce Sterilization

PLC has became the mainstream control device according to its powerful technic dominance, such as highly dependability, anti-amming,abundant function and so on. But now, PLC mostly still take on the most essential control, such as sequential control and PID feedback control. With the development of industry, process objective is more and more complicated, non-linear, large delay, and hard to build models. So it is difficult to fulfil the request only by PID control. However, advanced control strategies show unique advantages for resolving these problems in the control system. So the research of advanced control based on PLC is to be a current focus.In the first place, based on extensively research in the relevant field, this paper summarize the research and analyse the realization method of PLC ANN (Artificial Neural Networks)controller,and analysising the limitations of PID control,and introduced a humanoid Intelligent PID control method. Subsequently this paper discusses discussed the various technologies of PLC-based control system, which mainly involved the technology on SIMATIC S7-300 PLC configuration, programming and graphics control of WinCC,and an application of basic control algorithm based on the S7-300 PLC conventional control system configuration is provided.Based on above paragraphs, we stress the research of advanced control strategy, specially ANN arithmetic. Combining the characteristic of PLC, the realization method of ANN control based on PLC is provided. At the same time,the designing approach of PLC-ANN controller is discussed in detail. In the end, according a 2000T/D sterilization production lines, we can establish an industrial object model, by the system simulation, the reliability and validity of PLC-ANN controller is verified.As is shown in the paper, the realization of advanced control strategy based on PLC is feasible. The research of advanced control based on PLC has opened up a new field for the automation system. With the widely use in industry and research of PLC, we can see the expansive foreground of the technology of advanced control based on PLC.