Parameters may be assigned default values in the module declaration.
For example:
Motor(398, 765 { X-Y coordinates },
13 { Color },
MtrStat = 1 { Motor status },
MtrAmps = 30 { Motor current });
If no value is provided for MtrStat and MtrAmps when the module is called, then these will be given the default values of 1 and 30, respectively.