DCC Decoder Reset Values

Here is a summary table with reset values for the majority of the most popular DCC decoders. The DCC Wiki has much more information on these values that discusses do and don’t and options along with a great deal of other information. An example of some of this additional information is:

    To reset an Econami Decoder, there are options.

        Writing the following values to CV8 will do a complete reset or only reset groups of CVs:

          8 = Full CV reset
          9 = Reset CVs 1-128
        10 = Reset CVs 129-256
        11 = Reset CVs 1.257-1.512
        12 = Reset CVs 2.257-2.512

Here is the list of decoder resets by manufacturer. 

Multifunction Decoder Default Reset Values
Manufacturer	ID No. in CV8	CV to Write plus Value
Lenz Elektronic	99	CV8 = 33
NCE Corporation	11	CV30 = 2
Digitrax	129	CV8 = 8
ESU (LokSound)1	151	CV8 = 8
Train Control Systems (TCS)	153	CV8 = 8 or CV30 = 2
SoundTraxx: DSDLC, DSX, Tsunami3	141	CV30 = 2 CV8 = 8
QS Industries	113	See text below
Model Rectifier Corp (MRC)	143	CV125 = 1
Broadway Limited Imports (BLI)	38	CV8 = 8
Bachmann Trains 2	101	CV8 = 8
MTH	27	CV8 = 8
DCC Concepts	36	CV8 = 2 or 8
Kato Precision Industries	40	CV8 = 8
Hornby Hobbies Ltd	48	CV8 = 1
Gaugemaster	65	CV8 = 8
Atlas Model Railroad Products	127	CV8 = 99 (depends on decoder)
ZTC	132	CV8 = 8
Zimo Elektronic	145	CV8 = 8
LGB	159	CV55 = 55
Arnold / Rivarossi	173	CV8 = 8

CV8 is the Manufacturer ID. This value is assigned by the NMRA. Writing any value to CV8 does not change its contents as it is a read-only variable.

¹ ESU recommends using the programming track.
² Bachman products may be equipped with Soundtraxx decoders
³ Programming track with booster required.

Notes

First generation Soundtraxx (Tsunami) and QSI decoders will require a Program Track Booster or a PowerPax.
Newer Soundtraxx Econami and Tsunamis (Tsunami2) do not require the program track booster.

MRC Decoders are not reliable for read back.

Some Lenz decoders may work with a value of 8 or 33 in CV8. Older decoders used 33.

The Atlas reset value depends on the decoder type installed.

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