在对Profibus总线协议和主站状态机制深入分析的基础上,研发了冗余Profibus-DP通信协议主站卡.利用ASPC2主站协议芯片进行通信系统设计,通过主备冗余逻辑和同步通讯电路进行数据的周期性同步备份,实现了主卡和备卡的无干扰切换以及主站与从站无故障数据通讯.该冗余通信协议卡成功运用在某1000MW火力发电机组辅网控制系统中,实际工作表明,其可靠性和稳定性皆符合运行标准.%Based on the analysis of Profibus protocol and status mechanism, a redundant Profibus-DP communication master card was developed. The communication systems was designed by using the ASPC2 communication protocol chip,and back-up the data at regular intervals through main-standby redundancy logic and synchronous communication circuits.So the master card and slave card can switch over without interference and have a trouble-free data communication in master and slave station.The redundant communication protocol card has successfully used in auxiliary network control system of a 1000MW thermal power generating units. The actual work show that this system is reliable and stable.
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