ANALYSIS AND IMPLEMENTATION OF USER LAYER PROTOCOL OF FOUNDATION FIELDBUS

Fieldbus is a development direction for automation control technology.FF is coming to become the advanced fieldbus technology out of all fieldbus technologys.Implementation of user layer protocol is helpful for the development of digital and intelligent automatic control system.From the perspective of protocol and software,the article analyses user layer protocol and submits the design model and design method of user layer protocol of foundation fieldbus.