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Abstract This paper introduced the PLC and the characteristics of the development trend on the hydraulic press in the development of domestic and international situation and forecast. And detailed the YS32G-630C hydraulic principle and the characteristics of the hydraulic machine's main circuit, the control circuit and the principle of the hydraulic system carried out a detailed analysis. This paper presents the traditional hydraulic machine relay - contact with electrical control system for a number of issues and made a better rehabilitation programmes. Through the use of programmable logic controller (PLC) to replace the traditional relay - access control, allowing the system to control more easy-to-understand, the operation more flexible. In the design of hardware and software design of the system on two aspects of the transformation programme. On the hardware circuit design, described the system of ideas and transform the content and the choice of PLC and the PLC control system wiring design done a detailed explanation. In line design software, according to the work of hydraulic flow chart and control circuit, discussed the idea of the design process and its design, and the mapping of the procedures ladder. Papers in the final of the PLC control system design of the interference problem for a simple exposition. In modern enterprises, the PLC with its powerful, universal quick, environmental adaptation, and simple programming and a series of advantages in a variety of machine tools has been widely used.

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This paper introduced the PLC and the characteristics of the development trend on the hydraulic press in the development of domestic and international situation and forecast. And detailed the YS32G-630C hydraulic principle and the characteristics of the hydraulic machine's main circuit, the control circuit and the principle of the hydraulic system carried out a detailed analysis of This paper presents the traditional hydraulic machine relay - contact with electrical control system for a number of issues and made a better rehabilitation programmes. Through the use of programmable logic controller (PLC) to replace the traditional relay - access control, allowing the system to control more easy-to-understand, the operation more flexible. In the design of hardware and software design of the system on two aspects of the transformation programme. On the hardware circuit design, described the system of ideas and transform the content and the choice of PLC and the PLC control system wiring design done a detailed explanation. In line design software, according to the work of hydraulic flow chart and control circuit, discussed the idea of the design process and its design, and the mapping of the procedures ladder. Papers in the final of the PLC control system design of the interference problem for a simple exposition. In modern enterprises, the PLC with its powerful, universal quick, environmental adaptation, and simple programming and a series of advantages in a variety of machine tools has been widely used.