Research on Functional Safety Communication Protocol Based on OpenSAFETY
Aiming at the problem of frequent functional safety accidents caused by low reliability of data transmission,this paper studies an openSAFETY functional safety communication protocol based on POWERLINK,presents an openSAFETY node with the PCP-AP architecture based on the real-time industrial Ethernet protocol POWERLINK,designs software and hardware structure of POWERLINK kernel layer based on FPGA soft-core processor,achieves the openSAFETY safety application interface program and the near bottom communication interface program based on MCU,and builds a functional safety communication experimental platform with B&R PLC as the safety control node.The electromagnetic interference experiment is designed according to the fault analysis,the communication situation of the functional safety communication platform is simulated in different degrees of electromagnetic interfer-ence in industrial fields,and compared with the non-functional safety communication platform,this platform verifies the reliability and necessity of the safety node.
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