Inc Sound Module Decoder - Manual

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7.2 Configuration Register: CV29

7.2.1 Characteristics Controlled by CV29

Configuration Variable 29 (CV29 for short) is a very special CV. The value

entered for this CV controls several things:

1. 2 digit addressing or 4 digit addressing (as described above)

2. Normal Direction of Travel (NDOT)

3. Speed step control: Advanced Mode (28/128 speed steps) or Standard

Mode (14 speed steps)

4. Analog mode conversion On or Off

5. Speed table On or Off

The Normal Direction of Travel, or NDOT for short, lets you set up your

locos to run either long hood forward or short hood forward. The decoder

determines which way the loco will move independent of track polarity, you

can set up either direction as forward depending on the prototype.

There are two modes for speed step control: Standard or 14 speed step mode

and Advanced or 28/128 speed step control.

Because of differences in the capabilities of DCC compatible command sta-

tions and decoders, you may have to set CV29 in your decoders to different

values to match the mode of the command station you are using. If your com-

mand station sends standard 14 speed step mode commands, your decod-

ers must be programmed for standard mode. If your command station sends

advanced 28/128 speed step commands, your decoders must be programmed

for advanced mode. All Digitrax decoders are 128 speed step capable and we

recommend that for best performance you run them in 128 speed step mode. If

you are using non-Digitrax decoders that do not support advanced mode and

you want to run your command station in advanced mode, you can “status edit”

the standard decoders so that they can be run with your command station. See

your starter set manual for the specifics of status editing.

Loadable speed tables can be enabled or disabled with CV29. Speed tables are

used to customize the throttle response curve of each decoder equipped loco-

motive. The speed table values can be stored in the decoder and then the table

can be turned on or off with CV29. See the section on CVs 65-93 below for a

complete description of how speed tables work.