| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and a method for supporting object-oriented access to information at a plurality of levels in a control architecture. SOLUTION: For easily performing data access, a layer adjacent to an MES system or a white box as a part of the MES system cooperates in order to encapsulate data. In addition, such object oriented data access can be built into a controller as a standard behavior of controller data types and tags of those data types. In this manner, data can be encapsulated as a data object to expose a property and/or a method related to the data utilizing a common interface with each data consumer. Thus, the data consumer can employ object oriented concepts such as a property, a method and a qualifier. COPYRIGHT: (C)2006,JPO&NCIPI
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