Diesel Version 5:CV 29

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NMRA CV 29 - Configuration Data #1

This CV is used to set up or enable basic functions of your decoder such as direction, speed step modes, DC operation, and address type. See the table below for more information on the settings controlled by this CV.

Related

Other basic configurations can be found in CV 61 and CV 182.


NMRA CV29
Configurations Supported
Range of Values0-255
Default ValueDEFAULT VALUE
Feature Description Default Value
Direction This setting controls the locomotive's forward and backward direction in digital mode only. Direction-sensitive functions, such as the motor and directional lighting headlights will be reversed so that they line up with the locomotive’s new forward direction. This setting offers a software-level fix if the decoder has been wired backwards, instead of re-wiring the engine. OFF 1
Speed Step Mode
(28/128)
This setting selects the speed step mode used by the decoder. This setting is not affected by your command station's throttle setting. When enabled, 128 speed step mode is active - the decoder will interpolate 128 speed step mode from 28 speed steps if your command station is not configured for 128 speed step mode. ON 2
Analogue (DC) Operation If this setting is enabled, the decoder will operate when DC power is applied. The functionality of your decoder is based on your DC Mode Settings. OFF 4
Bi-Directional Communication (RailCom) This setting determines whether the decoder will send or receive information over RailCom. See Bi-Directional Communication Configuration for more details OFF 8
User-Loadable Speed Tables This setting switches motor control between the 3-point Speed Curve and the 128-point Speed Curve. OFF 16
Address Type This setting switches the Address Type between 2-digit and 4-digit addressing. When this setting is enabled, the decoder will use a 4-digit "long" address. OFF 32