关键词: FF现场总线 系统配置 仪表选型 网段设计 负荷验算, Foundation Fieldbus System configuration Instrument selection Net design Load calculation

Abstract: Fieldbus system adopts two-way digital communication between the field measurement and control equipments. The International Electrical Commission lays down a set of buses, the foundation fieldbus (FF) is the mainstream one. The communication distance of FF can reach 1900m without using field bus repeater. Fieldbus system can use bus power supply and support the intrinsically safe explosion-proof environment.This paper is based on the Foundation Fieldbus System Engineering Guide and analyses the technical characteristics, system configuration, network topology, network risk management of FF fieldbus. Combined with a project in the removal of hydrogen sulfide tower process, this paper makes a concrete analysis of the FF instrument selection and the equipment requirements, design the rational distribution network and calculate load. The paper provides reference for the field bus system engineering design. The research of FF control system engineering application can reduce the cost of control. At the same time, FCS can improve the level of automatic monitoring system and scatter control functions to the scene. This can provide a more effective monitoring and management capabilities.