Method, bus components, and control system for {HEAD ~ ethernet based control} of {TAIL ~ an automation system} 
of
Method , bus components , and control system for { HEAD ~ ethernet based control } of { TAIL ~ an automation system }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL