The Object-Oriented Design Method For The Remote Power Statute And The Realization Of 104 As An Example

Remote communication is an important component of dispatching automation system, the large variety of the remote communication protocol not only waste a lot of software and hardware development of humananity, but also bring inconvenience to the user's selection of equipment and operation maintenance, so standardization of communication protocol is a hot research. After the emergence of standardized communication protocol, how to efficiently and rapidly develop a reliable communication software, and how to make the developed software easy to upgrade and maintain, is the developers'facing problems. This article brings a common sense solution for remote communication statute on this issue.The thesis firstly select the object-oriented technology and concurrent design technique to analyze the remote communications software with an view of the real-time communication software characteristics, explains the merits and adaptations of these two technologies, and advances a new finite state machine FSM (an effective tool to model the response acts of dynamic systems), which is an object-oriented highly structured realization framework. Compared with the conventional methods to achieve the FSM, this achieve framework has better maintainability and reusability; Secondly, it introduces IEC60870-5-104 Statute, this statute is the network access method of the Statute IEC-60870-5-101, in line with the mainstream of dispatching automation development; Thirdly, on the basis of detailed analysis in the IEC60870-5-104 Statute, it carries out 104 Statute's software model followed the above-mentioned methods.In the analysis stage, it imported the abstraction layer software architecture, and divided the system into 4 levels: network layer, transmission control layer, application layer and management layer and respectivly establishes static and dynamic model; at the design stage, through to the analysis of communication concurrent activities, it buildes tasks (threads), identifies the objects and message features,uses a large number of UML class and state diagrams for a unified description, and detailed introduces of design and realization of the network layer, transport layer and application layer; Finally, a comprehensive parameters test is given to the implemented software, which has a test interface and many course maps.Analyze from the results , the software is in line with the 104 Statute's parameters.