SoundTraxx Coach Lighting Decoder Users Guide - Manual (Page 9)

SoundTraxx Lighting Decoder User’s Guide Page 6
the CVs in the decoder. Simply remove the model from the mainline and wait
for the lights to turn off. This will indicate the SuperCap has discharged. (This
usually takes between 35 and 120 seconds depending on the values you
have in CV 55 and 56 as well as how many bulbs you have on the outputs.)
Programming Procedure
As each DCC system is different, the procedure for programming a CV will
vary depending upon the system. Unfortunately, we cannot provide detailed
instructions to cover every command station and have to assume that you
have some level of understanding regarding it’s capabilities and operating
procedures. For specific programming procedures, please consult your DCC
system manual.
Locking and Unlocking CVs
The CV Lock/Unlock is a relatively new feature available in some DCC
decoders which allows you to program a decoder without the danger of
overwriting the programming in another. This especially useful in installations
where multiple decoders are used. For example, if you have installed a
function decoder in addition to the mobile decoder, you may wish to lock the
CVs after programming to prevent accidentally programming one or the other.
CV 15 and 16 are used for locking and unlocking the decoder. To use the CV
Lock feature implemented in CV 15 and 16, Bit 0 of CV 30 must first be set
to 1 (the default value is 0). This is to avoid inadvertently locking the decoder
when the CV Lock feature is not needed.
CV 15 is the Unlock Code and may be programmed to any value between 0
and 255 regardless of whether the decoder is locked or unlocked. CV 16 is
the Lock Code and may be set to any value between 0 and 7 but only when
the decoder is unlocked. Attempts to program CV 16 with a value greater
than 7 will be ignored.
The decoder is unlocked when the value in CV 15 matches the value in CV
16. Otherwise the decoder is locked and can not be programmed in either
operations mode or service mode. Further, a locked decoder can not be reset
to its factory defaults until it is first unlocked. These decoders are shipped
from the factory with all CVs unlocked, that is, CV 15 and 16 are both set
to 0.
Note that if the decoder is unlocked, changing the value in CV 16 will
instantly lock the decoder. You must then set CV 15 to the same value as
was just programmed into CV 16 to unlock the decoder again.
If you decide to use the CV Locking feature for a multi-decoder installation,
each decoder installed inside that locomotive must first have its Lock Code
in CV 16 set prior to installation of any other decoders. Otherwise, all the
decoders will have the same Lock Code and the feature will not work. The
easiest way to go about this is to first install one decoder and program its
Lock Code. Then install the next decoder and program its Lock Code. Since
Basics of Programming