This part of IEC 62453 provides additional information for integrating the Foundation Fieldbus (FF) protocol into the COM implementation of the FDT Specification (IEC 62453-41). The document describes communication definitions, protocol specific extensions and the means for block (e.g. transducer, resource or function blocks) representation. The new protocol specific definitions are based on FF-Specifications for H1 and HSE protocols. Furthermore, the definitions contain information that is needed by systems to configure FF Devices. The scope is limited to Foundation Fieldbus device and system specific definitions. This specification neither contains the FDT specification nor modifies it.