Linking {HEAD ~ device} in {TAIL ~ a process control system} that allows the formation of a control loop having function blocks in a controller and in field devices 
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Linking { HEAD ~ device } in { TAIL ~ a process control system } that allows the formation of a control loop having function blocks in a controller and in field devices
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH