Diesel Version 5:CV 1: Difference between revisions

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{{Infobox CV
|cv name= Short Address
|cv range=0-127
|cv accepted=1-127
|cv default=3
}}
== NMRA CV 1 - Short Address (Primary Address) ==
== NMRA CV 1 - Short Address (Primary Address) ==
CV 1 dictates what the short address of the given device is. Decoders ship with a base value of 3 in this CV, and allow you to begin controlling them immediately by calling up address 3 on your command device.
When programming a decoder address, there are two address "ranges" you can program: Two-digit "Short" addresses, and Four-digit "Long" addresses. The word "digit" refers to the number of 4-bit "nibbles" used to represent the address in binary. The word "digit" does not mean there needs to be specific numbers in your address! The address type, short or long, is configurable using CV29. By default, a decoder ships in the two-digit "short" addressing format with a value of 3. A DCC decoder will operate out of the package on Address 3 with no programming required per NMRA requirement.  


{{Infobox
Short Addressing:
|title = NMRA CV 1
The two-digit "Short" address is stored in CV1 and has a valid range of values from 1 to 127. A value higher than 127 is invalid for short addressing. If you would like to program your locomotive with an address (such as a road number) which is greater than 127, you must use a 4-digit "Long" address. Per the NMRA spec, CV1 cannot be modified on the main via operations (OPS) mode programming; therefore, you MUST use a dedicated DCC programming track to make that change.
|header1 = Base Functionality
 
|label2 = Range of Values
A value of 0 in CV 1 will enable "source conversion" if supported by the decoder.
|data2 = 1-127
 
|label3 = Accepted Values
[[Category:Standard CV]]
|data3 = Any
[[Category:Addressing]]
}}

Revision as of 19:17, 2 April 2021

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NMRA CV 1 - Short Address (Primary Address)

When programming a decoder address, there are two address "ranges" you can program: Two-digit "Short" addresses, and Four-digit "Long" addresses. The word "digit" refers to the number of 4-bit "nibbles" used to represent the address in binary. The word "digit" does not mean there needs to be specific numbers in your address! The address type, short or long, is configurable using CV29. By default, a decoder ships in the two-digit "short" addressing format with a value of 3. A DCC decoder will operate out of the package on Address 3 with no programming required per NMRA requirement.

Short Addressing: The two-digit "Short" address is stored in CV1 and has a valid range of values from 1 to 127. A value higher than 127 is invalid for short addressing. If you would like to program your locomotive with an address (such as a road number) which is greater than 127, you must use a 4-digit "Long" address. Per the NMRA spec, CV1 cannot be modified on the main via operations (OPS) mode programming; therefore, you MUST use a dedicated DCC programming track to make that change.

A value of 0 in CV 1 will enable "source conversion" if supported by the decoder.

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