SoundTraxx Coach Lighting Decoder Users Guide - Manual (Page 10)

SoundTraxx Lighting Decoder User’s Guide Page 7
the first decoder is now locked it will be unaffected by the programming of
the second decoder (unless you accidentally set the Lock Code of the two
decoders to the same value. If this happens you will need to disconnect one
decoder and start over). Continue in this manner until all decoders have been
installed and their Lock Codes have been set.
It is a good idea to set up a standardized system so you don’t forget the Lock
Code settings. You might, for example, set all motor decoders to a CV Lock
Value of 1, sound decoders to a value of 2 and function decoders to a value
of 3. Keeping CV 15 set to 0 will guarantee the decoder stays locked until
you are ready to begin programming.
Example: Let’s say you will be installing a motor decoder, a sound decoder
and a function decoder in one locomotive. Using the previously described
system, you would first install the motor decoder and set its Lock Code by
programming CV 16 to 1. Since CV 15 is currently set to 0 (the default
value), the decoder is immediately locked. Now install the sound decoder
and set its Lock Code by programming CV 16 to 2. Since CV 15 is still set to
0, this decoder is also immediately locked. Now install the function decoder
and set its Lock Code by programming CV 16 to 3. At this point, all three
decoders are installed and locked. Starting with the motor decoder, set CV 15
(the Unlock Code) to 1 to unlock and program the motor decoder. When you
are finished set CV 15 to 2 and program the sound decoder. Finally, set CV
15 to 3 and program the function decoder. When you are done, set CV 15
back to 0 to lock all the decoders.
If You Forget the Lock Code
As there are only eight possible combinations, you can easily determine a
forgotten Lock Code setting using trial and error with the following procedure:
Place the model on the programming track and set CV 15 to 0, then attempt
to set CV 16 to 0. If the decoder’s lights flash then it is unlocked. If it does
not flash its lights then it is locked. If the decoder is locked set CV 15 to 1
and then try setting CV 16 to 1. If the decoder’s lights flash it is unlocked. If
it remains locked continue the exercise with values 2-7 until CV 16 causes
the decoder to flash its lights. Once the lights have flashed the decoder is
unlocked and you can make any CV changes you desire.
Troubleshooting Tip
Be aware that even if you are not planning to use the CV Lock feature, it can
still be accidentally activated by inadvertently programming CV 15 or 16 with
a non-default value. If you have a decoder that is otherwise working (i.e.
responding to function commands) but has suddenly stopped accepting CV
changes, then first run through the procedure under “If you Forget the Lock
Code” to determine if the decoder has been locked.
Basics of Programming