~G4
19 Years old, modeling the Cowlitz, Chehalis, and Cascade Railroad of Western Washington in 1927 in 6X6 feet.
Why were you told to reset CV 125? What brand of decoder do you have that they told you to do this?
if your Digitrax decoder needs to be reset (despite which locomotive its used in) cv08 is the way to go. set cv08 to a value of 08. that will do a total reset of your decoder back to the factory defaults. if you want to keep your programmed 128 speed steps , you can elect to program cv08 to a value of 09.
what kind of dcc system do you run? i can instruct only on how to use the dcs50 / dcs51 zephyr.
here is a link to digitrax home support page: http://www.digitrax.com/support/
here is a basic way which is kinda universal:
Your DCC Decoders have many different configuration variables (CVs for
short) that let you set up a different set of characteristics for each decoder
installed in a locomotive. When you want to change a loco’s address, set up
how its lights work, change its momentum characteristics, etc. you will program
new CV values into the appropriate CVs to set it up just the way you
want.
Each CV controls a characteristic of the decoder. See your decoder manual for
a list of the most commonly used CVs and their meanings. A Digitrax Decoder
Manual is included as a part of your Zephyr Xtra system. Each decoder comes
pre-programmed with factory settings that will let you run it right away. We
recommend that you use the factory settings until you are comfortable with
running your layout with Digital Command Control.
The factory set address for all Digitrax decoders is 03. This is the first CV you
will want to change because it is not very useful to have all of your locos
respond to the same address.
Decoders are programmed when the command station sends programming
information to them through the rails. Your DCS51 supports two types of programming:
Service Mode Programming is done on an electrically isolated programming
track. Using this mode, the command station broadcasts programming information
to all decoders on the program track. Because this is a broadcast mode,
you must isolate the decoder you want to program from the others on the layout
by using a separate programming track that is connected to the command
station for programming but not powered for operation of the locomotive. This
mode works with all DCC decoders. This is the most commonly used programming
method.
Operations Mode Programming is done on the layout by sending programming
commands to a specific locomotive address while they are powered on
the mainline or main layout track. To use this mode, you must have decoders
that are capable of operations mode programming. The programming track is
not used when using ops mode programming.
16.1 Setting up a programming track
Your DCS51 has two sets of DCC outputs. This means that you will be able to
program decoders using one set of DCC outputs while the layout is running on
the other set of DCC outputs. When you hooked up your DCS51 to the layout,
you used the rail a & rail B connections to the track. Now we will use the
prOg a & prOg B outputs to set up a programming track.
nOte: The programming track is powered for programming only and cannot
run locomotives. You will have to manually move your locomotive on to the
track whether using the siding or isolated track programming setup.
There are many different CVs that have been defined to control the operating
characteristics of your locomotives. Your decoder manual has a complete listing
of CVs that are available in specific decoders, what they do and suggested
values for each CV. Programming these CVs is simple:
1. Be sure that only the locomotive you want to program is on the programming
track (if using Operatiosn mode the loco will need to be on the mainline).
2. Press the prOg Key to enter programming mode. The DCS51 will display
one of the programming modes available. Digitrax recommends the Direct
Mode when you are using the programming track. As you press the prOg
Key repeatedly, you will cycle through the following choices:
dir, OPS,PAGE, PHYS,
Once the mode you want to use is on the screen you can go to step 3.
Press the CV Key and you will see P followed by the last CV number used
by the DCS51. The “t” indicates that you are in Direct programming mode.
4. Enter the CV number you want to program. For example, if you want to set
up acceleration which is controlled by CV03, use the keypad to enter 3.
5. Press the CVrD
key to to read back the data value currently programmed
into the decoder for the CV selected.
The numbers will flash for a few seconds as the DCS51 command station
reads back the data value in the decoder. The “d” means that you are looking
at the CV’s data value that is programmed into the decoder, in this case the
CV value is 0.
6. Use the numeric key pad to enter the new CV data value you want to program
into the decoder. For example if you want to program the value of 2
for CV03 which controls acceleration, enter 2.
Note: If you do not want to read back the CV’s data value as described in
step 5, you can simply press the CV Key again to go directly to the data
entry mode. In this case, the display will show “d” followed by 3 digits.
When you see this display, use the key Pad to enter the new data value you
want to program.
7. Press CVWr
to write the new data value selected to the CV. The display
will show the data value programmed.
8. To program another CV, press the CV key and enter the CV number you
want to program next and repeat steps 3-7 again.
9. When you are finished programming, press the exit key to resume normal
operations.