Digitrax Evolution Express Series - Read and Write Configuration Variables

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NOTE: “Use AD4” in CV29 must be set to OFF to enable AD2 and must be
set to ON to use AD4. The DT602 will automatically set this value when a
change is made to AD2 or AD4. This option can also be manually set by fol-
lowing the below steps.
7. CV29 can also be setup in the Quick Decoder setup. CV29 also called the
Conguration Register is a special CV that controls a number of character-
istics for your decoder. CV29 controls:
• Normal Direction of Travel (NDOT)
• Speed Step Control: Advanced Mode or Standard Mode
• Analog Mode Conversion
• Speed Tables
• 2 or 4 digit addressing
See your decoder manual for a full listing of these features.
8. CV29 can be changed two ways in the Quick Decoder Setup. When in
Select mode ( key will read “DATA”) simply press the number key
corresponding to the feature you want to toggle o/on. For example press-
ing the key will toggle analog mode conversion o and on. The CV29
Value will automatically be calculated. Once you have all the settings con-
gured the way you want simply press the “WRITE” to write the con-
guration to the decoder.
9. Alternately, if you know the CV29 Value you want to program into the
decoder you can select it and use the keypad to enter the number. CV29
values can be looked up in the Decoder Manual or on www.digitrax.com.
10. To manually enter the CV29 value. Press the key on the keypad to
highlight the CV29 Value line. Press the “DATA” to select the line.
Use the keypad to enter the value you want to use, press “WRITE” to
write the value to the decoder.
11. After values are written to the decoder the text “CV Task Completed OK”
will scroll in the Scrolling Help Text line.
7.2 Read and Write Configuration Variables
There are many dierent CVs that have been dened to control the operating
characteristics of your locomotives. Your decoder manual has a complete list-
ing of CVs that are available in specic decoders, what they do and suggested
values for each CV. Programming these CVs is straightforward:
1. Be sure that only the locomotive you want to program is on the program-
ming track (if using Operations mode CV programming the loco will need
to be on the powered mainline).
2. To enter the CV Programmer, press the key.
3. Main Menu A will display giving you a list of menu options. Select 2- CV
Programmer by pressing the key on the keypad.
4. You will be presented with CV Program Menu A. From this menu use the