多现场总线接口智能仪表设计

Design of multi-fieldbus interface in intelligent instrument

在不同现场总线的产品共存的自动化系统中,如何使新兴智能仪表与原有现场设备或未来更新设备在通信方面相兼容,已经成为一个现实问题。为此,提出了智能仪表中多现场总线接口技术。从硬软件方面研究了智能仪表中MODBUS、PROFIBUS和CANBUS三种现场总线通信接口,重点分析了设计中的关键问题,并结合电工仪表产品实现了三种现场总线通信。通过对上位机的通信测试数据的分析,验证了该设计方案的可行性。

Different fieldbus products coexist in automation system on-site equipments or the update compatible in communication, which and how to make the new smart meters with the existing has become a real problem. Thus, this paper proposes a multi-fieldbus intelligent instrument interface technology. The design has made a study of three types of field-bus interface about MODBUS,PROFiBUS and CANBUS applied in intelligent instrument on hardware and software and gives a special focus on an analysis of the key issues, and realize communication combined with electrical instrument which was equipped with three field-bus communication boards separately. The design approved practicable, through the analysis of the communication data on host computer.