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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.