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