In accordance with yet another aspect of the invention, a linking device for interfacing with a plurality of field devices having function blocks communicatively coupled via a communication network that uses {TAIL ~ a standard communication protocol} and a controller, includes a communication stack communicatively coupled to the communication network that uses the communication protocol to monitor substantially {HEAD ~ all communications} on the communication network 
In accordance with yet another aspect of the invention , a linking device for interfacing with a plurality of field devices having function blocks communicatively coupled via a communication network that uses { TAIL ~ a standard communication protocol } and a controller , includes a communication stack communicatively coupled to the communication network that uses the communication protocol to monitor substantially { HEAD ~ all communications } on the communication network
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