Voices: Rezabek

Why HART and Foundation Fieldbus Don't Just Get Married

The Disparate Origins of These Protocols Mean a One-Size-Fits-All Heir Is Unlikely

By John Rezabek

How do you tell a HART device from a Foundation fieldbus (FF) device? There have been times when we've puzzled over it. Did the supplier make a mistake and send us a HART device when we ordered FF? On the surface, devices of the same heritage and generation have little beyond a subtle difference in the model number to distinguish themselves. With the merging of the HART Communication Foundation and the Fieldbus Foundation, some have wondered if there will be some new offspring, or if devices from one protocol will become conversant in the other. Foundation fieldbus and HART technologies have a lot of things in common. Why wouldn't they play nicely together some day?

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