Design and development of Modbus/RTU master monitoring system based on embedded PowerPC platform

Modbus protocol is widely used in the industrial control field because of its excellent reliability, flexibility, real-time performance etc. It becomes one of the international actuality industrial standards and including lots of industrial equipments using Modbus as their communication protocol such as PLC, DCS, intelligent instruments etc. Embedded system focus on applications, and it can adapt to the strict requirements of functions, reliability, cost, size, power consumption, and so on. PowerPC series processor of Freescale semiconductor CO., LTD is an ideal platform of RISC embedded applications, which has powerful communication ability, system stability and disturb rejection ability. Based on the MPC8248 embedded processor of Freescale, a data acquisition and monitoring platform using Modbus/RTU master protocol based on embedded PowerPC and embedded Linux operating system is designed in this paper, which can realize the functions in industrial fields such as data acquisition, remote monitoring and network communication etc.