Research And Development Of The Ph Control System About Clarification Workshop Section Based On Iec 61131-3 Standard

Clarification Workshop Section is a complicated controlling object which has the characteristics of the non-linear, multi-constraint, long time-delay and so on. Aiming at the complexity of PH value control in the course of neutralization and clarifying of the production flow in sugar mill, a kind of pH controlling system about Clarification Workshop Section based on S3C44B0X controller is presented in this paper. The principle of the pH control system is introduced in detail; The pH controlling equipments of the clarification workshop section are also designed which including the measuring device, the valve driving device and the sour washing pump device etc. The system of uClinux is transplanted on the controller of S3C44B0X successfully and the transplantation process of uClinux system on the platform of S3C44B0X is also described in detail. According to the designing expanded of the outer electric circuits, the driving program and the test program based on uClinux system are compiled.Owing to advantage of software programming, transplanting and dependability of the IEC 61131-3 standard, This paper introduces the theory of softPLC control system based on S3C44B0X controller and IEC 61131-3 standard; The implementing method of softPLC control system based on uClinux and IEC 61131-3 standard is provided; the firm function block about data measuring module, step-motor driving module and sour washing pump driving module based on IEC 61131-3 standard is designed too, which make the convenience for the customer.