基于多种通信协议的高炉渣粒化监控系统设计

摘要

In view of problems of non-compatible communication protocol between new and oldrnequipments and strong dispersion of field devices in reform process of monitoring and control system of high slag granulation of an Ironmaking Plant, a monitoring and control system of high slag granulation based on various communication protocols was designed. The system uses data integration mode with multi-level network and multiprotocol: field devices with ModBus communication interface use Profibus-ModBus protocol bus-bridge to finish data conversion from ModBus RTU to Profibus, field devices with Profibus-DP communication interface access DP network directly through respective Prifibus-DP communication board, field devices with AS-i communication interface integrate data in LOGO into master station of Profibus-DP through communication processor, unintelligent communication devices exchange data through several remote I/O slave stations composed of ET200M and I/O extended module; building independent process monitoring PC station in workshop of high slag granulation to real-timely monitor important parameters; integrating relative data of process monitoring PC station into monitoring center PC of enterprise management layer through protocol conversion. The actual application shows that the system has stable and reliable running and reaches reform requirements.%针对某炼铁厂高炉渣粒化监控系统在改造过程中存在新、老设备之间通信协议不兼容、现场设备分散性强的问题,设计了一种基于多种通信协议的高炉渣粒化监控系统.该系统采用多级网络、多协议的数据集成方式:具有ModBus通信接口的现场设备采用Profibus- ModBus协议总线桥完成ModBus RTU到Profibus的数据转换,具有Profibus- DP通信接口的现场设备通过各自的Profibus-DP通信板直接接入DP网络,具有AS-i通信接口的现场设备通过通信处理器将LOGO中的数据集成到Profibus- DP主站中,非智能通信设备通过由ET200M及I/O扩展模块组成的若干个远程I/O从站交换数据；在高炉渣粒化车间建立能够独立运行的过程监控PC站,对整个系统的重要工艺参数进行实时监控；将过程监控PC站的相关数据通过协议转换的方式集成到企业管理层的监控中心PC中.实际应用表明,该系统运行稳定可靠,达到了改造要求.