Ltd. is a high-tech enterprise integrating design, manufacture, installation and commissioning of chemical machinery and equipment and automation control. Our main products include reaction equipment, boiler pressure vessel, filling equipment, filtration equipment, environmental protection equipment, heat exchange equipment, mixing equipment, paint complete sets, automation control system, small experimental devices and so on. They are widely used in adhesive, resin, paint, ink, chemical, environmental protection, coating, factory, petroleum, chemical, rubber, pesticide, dye, medicine, food, commercial complex, laboratory, industrial place and other industries. The products are sold to Beijing, Shandong, Jiangsu, Nanjing, Qingdao, Shanghai, Guangdong, Xi'an, Liaoning, Dalian and other places.

PLC control system is a new generation of industrial control device formed by introducing microelectronics, computer technology, automatic control technology and communication technology on the basis of traditional sequence controller, which is intended to replace relays, execute logic, timekeeping, counting and other sequence control functions and establish flexible remote control systems. It is characterized by high versatility, ease of use, wide adaptability, high reliability, strong anti-interference ability, and simple programming.

PLC internal work mode is generally used to cycle scan work mode, in some large and medium-sized PLC to increase the interrupt work mode. When the user will debug the user program is completed, through the programmer to write its program in the PLC memory, while the field input signal and the implementation of the controlled components are connected accordingly in the input module and output module output, followed by the PLC work mode selected for the operation of the work mode, followed by the work of the PLC according to the user program to complete, outlining the figure is the PLC execution process block diagram. PLC in the process of work, the main completion of the six modules processing.