Abstract：Industrial communication technology is an effective way to achieve network control of industrial

equipment. With the development of Ethernet technology in recent years，a top layer application technology based

on Ethernet，PROFINET has rapidly developed. However，due to the lack of high-speed network interfaces in the

lower layer devices，it is necessary to convert the control and status words in the high-speed communication

protocol into a protocol that can be easily parsed by the lower layer devices，and then connect the devices to highspeed Ethernet. This scheme adopted the ERTEC200P-2 communication protocol chip for high-speed data

exchange with external Ethernet，and the lower layer was connected to the frequency converter through the UART

serial interface. The scheme has passed experimental verification and on-site verification，achieved good results

      Key words：PROFINET technology；ERTEC200P-2 chip；industrial communication