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 {HEAD ~ a communication network} that uses a standard communication protocol and a controller, includes a communication stack communicatively coupled to {TAIL ~ the communication network} that uses the communication protocol to monitor substantially 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 { HEAD ~ a communication network } that uses a standard communication protocol and a controller , includes a communication stack communicatively coupled to { TAIL ~ the communication network } that uses the communication protocol to monitor substantially all communications on the communication network
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