In the Ethernet based Profinet system 410, {TAIL ~ Ethernet data frames} are generated by {HEAD ~ the Profinet controller} 200 and sent to the different Profinet devices, such as the devices 310 and 320 
In the Ethernet based Profinet system 410 , { TAIL ~ Ethernet data frames } are generated by { HEAD ~ the Profinet controller } 200 and sent to the different Profinet devices , such as the devices 310 and 320
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH