基于openSAFETY的功能安全通信协议研究

Research on Functional Safety Communication ProtocolBased on OpenSAFETY

摘要:

针对数据传输可靠性低导致功能安全事故频发的问题,进行了基于POWERLINK的openSAFETY功能安全通信协议研究；在实时工业以太网协议POWERLINK的基础上设计了以PCP-AP为架构的openSAFETY安全节点,设计了基于FPGA软核处理器的POWERLINK内核层的软件硬件结构,设计了基于单片机MCU的openSAFETY安全应用接口程序以及近底层通信接口程序,搭建了以贝加莱PLC为安全控制节点的功能安全通信实验平台,依据故障分析设计了电磁干扰实验,模拟了工业现场中出现不同程度电磁干扰情况下功能安全通信平台的通信情况,并与非功能安全通信平台进行对比,验证了安全节点的可靠性和必要性。

Abstract:

Aiming at the problem of frequent functional safety accidents caused by low reliability of data transmission, the openSAFETY functional safety communication protocol based on POWERLINK is studied; Based on the real-time industrial Ethernet protocol POWERLINK, an openSAFETY node with PCP-AP architecture is designed. The software and hardware structure of POWERLINK kernel layer based on FPGA soft-core processor is designed. The openSAFETY safety application interface program and the near bottom communication interface program based on MCU are designed, and a functional safety communication experimental platform with B R PLC as the safety control node is built. According to the fault analysis, the electromagnetic interference experiment is designed to simulate the communication situation of the functional safety communication platform in the case of different degrees of electromagnetic interference in the industrial field, and compared with the non-functional safety communication platform to verify the reliability and necessity of the safety node.