The Research And Application Of Fieldbus In The Electrolyte Production System

PLC, fieldbus and intelligent instruments become the core of industrial automation. Whether the use is reasonable and valid relates directly to the system's cost and control effect. The wide application of intelligent instruments is inevitable. But the number of enterprise producing intelligent instrument is few, which restricts the popularization and application of the fieldbtiss rapidly that the development of the HART intelligent instruments in china. Now, HART protocol is mainly used in instruments, debugging, calibration and maintenance. It is rare that take the HART fieldbus communicate with PLC directly.In this paper, the control system will be a combination of PLC and HART fieldbus. It is use the free port protocol of S7-224XP to communicate with HART adapter and use the serial communication ports of ADAM-5510M to communicate with HART adapter.In raw material automatic feeding system, combine digital electronic weighing system with Coriolis mass flowmeter metering system. S7-224XP is used as controller, and using HART protocol to communicate with Siemens Coriolis mass flowmeter. The error code is be readed, then the PLC could monitor the bubble disturbance during the process of feeding. S7-224XP composes with four weight transmitters, and read the value of the transmitter through ASCII protomolthpidbper computer, the use of kingview 6.25 as configuration software to build configuration picture, realize real-time monitoring, recording and storage important data.According to the properties of various materials and various production process, choose the proper instruments and valves. Through the practice debugging, the matching between HART instrument and safety barrier was optimized. The tow ADAM-5510M serial ports communication to transfer data synchronously has be further improved.The control system has been put into production, stable operation. Relative to the PROFIBUS instruments and FF instruments, the price of HART instruments is low. Domestic manufacturer production technology is mature. TO small and medium-sized enterprises, HART bus is a right choice, especially in Explosion-proof area. The integration of HART bus and PLC will be worthy of using abroad.