| Because of internal differences of discrete manufacturing industries in the level of enterprises information and production process, at present, domestic study about MES for discrete manufacturing is not only lesser, but also not deep enough.Manufacturing Execution Systems studied in this paper aimed at providing a reliable platform in the production process management for discrete manufacturing enterprises. This platform can meet the basic function of MES, which is to connect the planning level and the control level and carry out the planning data transfer layer upon layer and real-time feedback of on-site production data.Firstly, paper described the background and significance of the research, analyzed current research and applications of the Discrete Manufacturing Execution System at home and abroad, pointed out the deficiencies in domestic study about discrete MES, and then expounded the theories and models of MES and structured modeling techniques.Nextly, combining with features of discrete manufacturing, this paper put forward functional models for discrete MES which are according with ISA-SP95 standards. The model consists of three major functional modules, ten sub-modules, the modules and the relationship between them were described with IDEF0 modeling tools.This paper made a deep study of data acquisition module of discrete MES system, and made a detail analysis about the data which MES needed, the process and methods of data collection, and the impact on data acquisition due to the difference of production types, and the process of data collection was described with data flow diagram. This paper made a deep study of production monitoring module of discrete MES system, analyzed production factors which discrete MES needed to monitor, the monitoring information of each production factors, the process and methods of monitoring, and how to deal with abnormal status.Finally, the conclusion and the developing trend in this domain were put forward. |
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