FMU participants differ from Ansys participants in the following ways:
FMU input/output variables and parameters are restricted to single scalar values and do not have quantity types.
Expressions are not supported for data transfers from solvers to FMUs.
Regarding data model settings:
For co-simulations involving an FMU participant, the CouplingInterface singleton does not include MappingControl settings.
FMU participants have CouplingParticipant settings that are significantly different from those of Ansys participants. For details, see FMU CouplingParticipant Data Model Settings.