Study And Development Of PROFIBUS PA Test System Based On Ethernet

Fieldbus technology is today's automation technology hot. It has some characteristics such as digital, full dispersion, openness and interoperability, and so on. Fieldbus is one of the most widely used field bus, and its application areas including manufacturing automation, process industry automation, transportation and electric power, and so on.In recent years, domestic enterprises have carried out the development of PROFIBUS PA. Before PA products allow to put into the market to sale, it is necessary to be tested tests of its compliance with the agreement by the authorize the laboratory. At present, the laboratory authorized only tests the PA molding products, There is no market at home and abroad.This article will do some testing research on the PROFIBUS PA product based on studying in-depth in the testing of fieldbus protocol, and to develop the test software and hardware platform which is in line with the PROFIBUS DP communication protocol and the PA rules. Papers the main contents include the following:1. Through the Understanding of the PROFIBUS fieldbus technology, based on the analysis of protocol testing theory, Developed the PROFIBUS PA testing program based on the Ethernet-based, including the basic framework and the testing process. This is the innovation of this article.2. To develop PROFIBUS PA testing system based on Ethernet, especially the for conformance testing. In the needs analysis phase, mainly described the need for the development of the system; at the design stage, respectively, to form the part of the test system software modules for further functional and to Schematic diagram of the module; in the realization stage, to set up ARM chip as the core hardware platform, software to achieve some of the test focuses on the design of software modules and the realization of the process of thinking, given the various modules of the software flow chart, code and operational results.3. To validate the test system. By the application of the system to a real test case, and to compare the test results with the testing laboratory authorized software, the test results show the correctness of the systesm.