Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Bypass
FP_FIELDCONDITION_BYPASSParameter: Combine Mode
FP_FIELDCONDITION_COMBINE_MODEParameter: Tolerance
FP_FIELDCONDITION_THRESHOLDParameter: Field
FP_FIELDCONDITION_FIELD