The only way I was able to program the Bachmann DCC turnouts with my NCE Power Cab was by removing all the locomotives from the track, disconnecting the power from the track, wait a few seconds and reconnect the power.
I push the programming button on the switch to enter the programming mode.  Select the accessory button on the cab, enter the address you want the turnout to operate at and press enter.  The turnout will click twice to accept the address.
The trun out should answer to your commands from now on.