The information processed by the linking device, which may include function block information, is automatically routed from {HEAD ~ a field device} to the controller or from the controller to {TAIL ~ a field device} 
The information processed by the linking device , which may include function block information , is automatically routed from { HEAD ~ a field device } to the controller or from the controller to { TAIL ~ a field device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL