Design and Implementation of MII Bus Based CNC System of Domestic-Processor Based on Loongson

This paper presents a kind of architecture design of bus based CNC system of domestic-processor based on Loongson and analyzes both the design of module structure of domestic-processor based on Loongson and the function and implementation method of MII bus based CNC main control board. These studies can solve the problem of chip of domestic NC system chip and have great significance to improve the industrial safety. MII bus which is the second generation of industrial field bus with high reliability is research and development by Yaskawa company. This paper detailed describes the design principle and implementation way of MII bus. The test proved that bus based CNC system of domestic-processor has the characters of flexible allocation, compact structure, easily used and high reliability, which all meet the needs of the CNC lathe processing.