CV 28

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NMRA CV 28
Bi-Directional Communication Configuration
Range of Values0-255
Default Value19

NMRA CV 28 - Bi-Directional Communication Configuration (RailCom)

Used to configure decoder’s Bi-Directional Communication characteristics when RailCom is enabled in CV 29.

  • Note If the decoder does not support a feature contained in this table, it shall not allow the corresponding bit to be set improperly (i.e. the bit should always contain its default value).
Feature Description Default Value
Channel 1 If enabled, Channel 1 will broadcast the address. ON 1
Channel 2 If enabled, Channel 2 will send and receive data and provide acknowledgements. ON 2
Programming Address 253 Serves as a programming lock. If this setting is disabled, programming address 253 will be locked. ON 16