ARM Gateway Based On Modbus Protocol

With the development of Internet, traditional Industrial Control Systems in tend to be an open network.When Fieldbuses are at war(or in an active state of conflict),Industrial Ethernet emerges as the times require. The advantages of Ethernet, such as high communication speed, resourceful hardware and software, potential of durative development and especially based on open IEEE Std. 802.3, are porting Ethernet to the Control Layer and Device layer of the Control Systems. Using of Industrial Ethernet technology must be the new direction of Control Network in the future.Through doing research on the key technology of Industrial Ethernet, the subject of " Modbus/TCP gateway based on ARM" aims to develop Modbus gateway based on ARM, which satisfies the real time transmission of Industrial Ethernet Technology. Following the design presented above, a general development platform for Industrial Ethernet intelligent instrument was developed, with emphasis on software and hardware design on the basis of ARM microprocessor and embedded OS. This article also summarizes the the technology of Fieldbuses and Industrial Ethernet. Do in-depth research the real time theory of Industrial Ethernet and Modbus/TCP protocol of Schneider's. And design a Modbus server based on ARM platform.Characteristic of this paper is associated with an innovative combination between Industrial Ethernet and embedded system. Result of this research provided a valuable reference for application of high performance embedded system in industrial control field and popularization of Industrial Ethernet.