Design And Implementation Of Network Communication Module In Embedded System Based On Modbus_TCP

With the progress of science and technology, network technology has a rapid development, and people's demand with the information sharing has gained incessant improvement. Follow that, all kinds of the electrical home appliances, instrument as well as the data acquisition device and control equipment of the industrial production have gradually tended to network, integration and automation, so that we can use the swift network resource to realize the remote monitoring, information exchange and information sharing.Because the field bus as the traditional way of the industrial communication has some disadvantages such as short in transmission distance, bad in interoperability, low in transmission rate. But in the large industrial control system, the devices besides meeting the demand of the production, there are a crucial link that is data acquisition and condition monitoring. For example, in power industry, reliability of microcomputer protection firstly relies on the data acquisition system and condition monitoring device. Therefore, it is the trends of the technological development that find an effective way to solve the above problem, so that we can realize the unattended and remote control in production site.Consequently, in order to adapt to market demand and demand of the practical production, this project is technical transformation for the relay protection device of power system which has existing. This paper analysis the industry background and development trend, then proposing a scheme that is "Design and Implementation of Network Communication Module in Embedded System Based on Modbus_TCP". And this embedded system is based on the a ARM7 chip which is LPC2290 microcontroller by Philips manufactured. This paper finished the hardware design of embedded gateway and the software design of system based onμC/OS-II, which realize the exchange between CAN data and Modbus data and transmit the data based on Modbus_TCP protocol. Concretely, it through Ethernet transmits the data to remote computer through Modbus_TCP. In the end, this project realizes the remote monitoring and the centralized management.This design is applied to the relay protection device of power system, realizing the resource sharing and remote control successfully which is economy, convenience and good in interoperability. Also, it has a positive significance that improving the integrated level and the automation level of power industry and even the whole industrial control field. And it proposes a simple and feasible scheme to realize the remote control and data transmission.