The Study And Application Of Data Acquisition And Convey For Manufacturing Execution System

Faced increasing fierce competition, it is an emergency problem for enterprises to develop new manage models to win the market.MES (Manufacturing Execution System) is a new information system, which is a bridge to fill up the gap between the planning systems and direct industrial controls and has been the mainstream technology on the product management and the plant floor control.The base of MES is the technology of Data Acquisition and Convey, which has a popular application in the engineering fields, such as Auto Control, Electrical Mearsuring and Aeronautics & Austronautics.Now, an important direction for research of this technology is how to acquire data, how to monitor the condition of the Numerical Machine.This paper is based on the informationized project of Shanghai Tabacco Machine Corporate. With comparation and demonstration, NCS Data Acquisition System was developed to resolve the link between MES and direct industrial controls, and made it easier for ERP/MES/PCS integration.Based on the analysis of structure and function model of data acquisition principle, four feasible schemes of data acquisition are proposed, in accordance to different machines. With the DSP chip of TMS320LF2407A, a box of DCS data acquisiton was designed, which well completed the connection between MES and Control System.According to the results mentioned above, MES based technology of Real Data Acquisition MES has been applied in the process of production. Detailed strategy is given to resolve stochastic events, such as equipment fault and emergency order. The effectivity and rationality of the model are proved by the real data.