I enjoy the pleasure of operating an ON 30 layout at a friend's home.  There is an assortment of Shays, Heislers and other engines,  all Bachmann with DCC on board.  Recently we tried to set various CV's to fine tune operations.  I can set CV 2 start voltage and CV's 3 and 4 but cannot set CV 5 max speed nor CV 6 mid speed.  The print-out does not mention CV's 5 and 6.   Are they not supported by Bachmann decoders?

George J1