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Dear Fellows, At the new ABB Freelance system there is a controller called AC800 which is a multiprotocol ( Profibus, Fieldbus, etc.. ). There is a serial communication board called FI 820F. It looks that with this board I can develop new custom serial protocols to connect third part devices ( like old RTUs or PLCs ). Does any one have expirience with this board ? What kind of tools are needed ? Regards Claudio Torres