SoundTraxx Tsunami Steam Users Guide - Manual (Page 14)

Tsunami Steam Sound User’s Guide Page 11
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 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 locomotive on the Programming Track and set CV 15 to 0. Then
try to read the value in CV 16. If CV 16 does not read back, the decoder is
locked. Set CV 15 to 1 and try reading CV 16 once more. Again, if CV 16
does not read back, the decoder is still locked. Program CV 15 to 2 and try
reading CV 16 again. Continuing in the manner, you should eventually find
the value stored in CV 16 as it can only be programmed between 0 and 7.
If you have tried setting CV 15 to all eight values between 0 and 7 and the
decoder still does not respond, there may be a problem with the installation,
the program track or the decoder itself and further investigation will be
required.
If you do not have access to a programming track with read-back capabilities
(or are uncertain as to whether it is working properly) you can also use
operations mode to discover the Lock Code by alternately programming CV
15 and setting another CV to a value where there is a known response. For
example, changing CV 128, the master volume control, will provide auditory
feedback as to whether the decoder is unlocked by virtue of a change in
sound level. Thus, you would begin by setting CV 15 to 0 and then setting
CV 128 to 0. If the volume does not fall to zero, the decoder is locked. Then
set CV 15 to 1 and try programming CV 128 again. Repeat this process until
you find a value for CV 15 that results in a change in sound volume as you
change CV 128.
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
Basics of Programming