KB557: CV29 - Configuration Register Look Up Table Method

CV29 is called the configuration register. It controls the following decoder characteristics: 
1.  Whether the decoder uses 14 speed steps, 28/128 speed steps or loadable speed tables.  This affects how smoothly the loco will move and how it responds to throttle controls.
2.  Whether the decoder automatically converts to analog mode when no DCC signal is present.  This allows the decoder to operate on a DC layout even though it is DCC equipped.
3.  Defines the normal direction of travel for the locomotive. Normal Direction of Travel or NDOT can be changed when the motor connections of decoder have not been connected so that the locomotive runs in the "wrong" direction. Setting the NDOT to be long hood forward is also useful if you model Southern Railway from the 1960's on; Southern was famous for making the long nose of their road switchers the "front", contrary to virtually all other railroads' practice. By changing the NDOT, you can have your Southern diesels traveling in the "right" direction
4.  Whether the decoder will use a 2 digit or 4 digit address.

Look Up Table Method The look up table below shows the effects of different CV values for CV29.

CV values are shown in both hex (for older Digitrax throttles) & decimal (for all current production throttles).

The table lists all usable values for CV29; the idea is to find the right combination of features and then match these up to the value that you program into CV29.

For example, programming a value of 032 for CV29 will make the locomotive operate in 14-step speed mode, with the ability to operate on an analog layout turned "off", it will operate in the normally forward direction and it will have a two digit address.

Another example is, programming CV29 with a value of 055 will make the locomotive operate in 28 or 128-step speed mode, the locomotive will be able to operate on a layout controlled by a traditional power pack, it will operate in the normally "reverse" direction and it will have a four digit address.

The factory default value for CV29 is 06. 

CV29 Values:

The factory default value for CV29 is 06.