CV29 controls many aspects of the locomotive, including its decoder address (including two or four digit address) , normal direction of travel (NDOT), whether the locomotive opperates at 28 speed steps or 128 and others.

Some older Digitrax throttles use hexadecimal notation for programming.  This article is presented for the benefit of those who may still be using these throttles.  CAUTION: if you are NOT using a DT100 or DT200, please disregard this article to avoid confusion.

The Addition Method The table below shows each switch and its value if it is on or off.

Notice that if the switch is off the value is zero.

To determine the hexadecimal* value to program for your decoder just go down the list and add up the numbers for all the switches you want to set as ON.

CV29 Examples of CV Values:

All Digitrax decoders are shipped with a factory programmed value of 06 in CV29. This gives the decoders the characteristics highlighted.

Note: 06 hex is the same as 06 decimal A value of 27 programmed into CV29 will give you a decoder that has a normal direction of travel in reverse, operates in advanced 28/128 speed step mode, has analog mode conversion enabled, does not use a speed table and has 4 digit addressing.

*The values shown on both tables are hexadecimal values. As you turn the throttle right hand knob to the right on a throttle that is using hexadecimal numbers, you will see 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0b, 0c, 0d, 0E, 10, 11, 12 etc. Because the 6 & b look very similar on the display, be careful. If you use 0b, for example, as the value for CV29 you won't get the 06 effects you are expecting!