This paper gives a brief introduction to the technological process and hardware configuration of wet part and dry part and QCS in paper mill,and addresses the method of using MPI network in wet part and dry part and QCS control station,using Profibus-DP network between the scanner control station and operating station to realize high speed data transfer.

By using PROFIBUS-DP network communication,this system is of good characteristics,such as good reliability and high performance/price ratio.

Being a widely used criterion in the industrial control system, PROFIBUS-DP network, together with DC/AC transducer and PLC module, makes up of the bottom hardware system.

This paper introduces the framework of the PROFIBUS/DP networked control system based on the distributed I/O model.

The adoption of multiple standby computers,Profibus DP loop network,fiber-opti.

The development of intellect controller based on PROFIBUS DP is introduced.

Meanwhile, as the particularity of water treatment, it needs high requirements for FA (factory automation) network so that it is importment for PROFIBUS network in the water treatment monitoring and control field.