溪浙特高压直流工程PROFIBUS DP通信告警分析

摘要

In Xizhe HVDC project the PROFIBUS DP communication false alarm occurs frequently, which is triggered by the detection of the heartbeat signal.It is found that the PROFIBUS DP communication system is a multi-link asynchronous system.The time window of the heartbeat signal is changed by the data transfer in the multi-link asynchronous system, and the continuous multi-frame has the same heartbeat signal, which causes the false alarm of PROFIBUS DP.In this paper, the characteristics of heartbeat signal transmission in multi-link asynchronous system are analyzed in detail.The research method can be applied to similar structure commnunication systems.%溪浙特高压直流输电工程在调试期间频繁出现PROFIBUS DP通信误告警,该误告警由系统对报文心跳信号的检测引发.研究发现,溪浙工程的PROFIBUS DP 为多环节非同步通信系统.心跳信号在多环节非同步系统的传递过程中被改变了时间窗,形成连续多帧有相同的心跳信号的报文,造成了PROFIBUS DP通信误告警.文章详细分析了心跳信号在多环节非同步系统中传递的特性,提出可行的解决方案.该研究方法对类同结构的通信系统问题分析有一定的借鉴作用.