[sim, PacketFramework, ParameterID, Parameter] = ld_PF_ParameterForPlugin(sim, PacketFramework, NValues, datatype, ParameterName, optionalInitValue)
Define a parameter and get the ParameterID to control it by a plugin
NValues - amount of data sets
datatype - only ORTD.DATATYPE_FLOAT for now
ParameterName - a unique string decribing the parameter