| Via an applied sample of an reconstructive project of the control system of 1# & 2# HUAXIN type cement kiln in HUAXIN CEMENT CO. Ltd., the paper introduced the application of the in the hard-core of SIMATIC S7-300 PLC and its software system in the industrial producing process particularly. From the introduction of the structure and characteristic of DCS, the analyzing in process and control peculiarity of HUAXIN type cement kiln and the analyzing in the ordinary forms of computer control system in the cement plant ,To determine the feasibility of application of the DCS in computer control system of HUAXIN type cement kiln; Introduced the structure of the system hardware , constitutes and characteristic of the industrial network, the characteristic and the performance in industrial control system of the software system; Illuminated the whole course of the design and the application of SIMATIC S7-300 Programmable Controller in the industrial producing process profoundly: the protraction of a control flowchart; the confirmation of the control scheme in every cell; how to workout a table of the all controlling and measuring dots in the control system; how to set up a PLC control project; the configuration of the hardware and the network in project; illuminated the course of how to program the PLC control program in detail; how to establish a connection between the PLC and the programmer; how to download the configuration and the program of the PLC project; the configuration of control center software SIMATIC WinCC; the whole course and the methods of the control system debugging; Illuminated the essential in the course of the design in project and program; Illuminated the problem and its respondence maybe encountered in the project ; Illuminated the superiority of the new control system in inspecting , operating and its stability ; discuss the development of the computer control system in the application of the HUAXIN type cement kiln. |