Read And Write Configuration Variables - Digitrax Zephyr Express DCS52 Manual

6. To set AD4 make sure you are back in select mode (C Soft Key will read
"DATA"). Press the 2 key on the keypad to highlight the AD4 line. Press
the C Soft Key "DATA" to select the line. Use the keypad to enter the
address you want to use, press B Soft Key "WRITE" to write the address
to the decoder.
NOTE: "Use AD4" must be set to OFF when using AD2 and must be set to
ON when using AD4. The DCS52 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 instructions.
7. CV29 can also be setup in the Quick Decoder setup. CV29 also called the
Configuration 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 (C Soft Key will read "DATA") simply press the number key
corresponding to the feature you want to turn off or on. For example press-
ing the 4 key will toggle analog mode conversion off and on. The CV29
Value will automatically be calculated. Once you have all the settings con-
figured the way you want simply press the A Soft Key "WRITE" to write
the configuration 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 3 key on the keypad to high-
light the CV29 Value line. Press the C Soft Key "DATA" to select the
line. Use the keypad to enter the value you want to use, press B Soft Key
"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.

11.3 Read and Write Configuration Variables

There are many different CVs that have been defined to control the operating
characteristics of your locomotives. Your decoder manual has a complete list-
ing 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 program-
ming track (if using Operations mode the loco will need to be on the main-
line).
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