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Decoder for Atlas N Scale H15/16-44 Locomotives
7
Atlas Model Railroad Co., Inc.
Configuration Variables and their Definitions
The H15/16-44 decoder supports a full range of features, which are
activated by setting Configuration Variables. All CVs are numbered.
These numbers are used during programming and are identical for all
decoders that conform to NMRA standards, regardless of the decoder
manufacturer. The following table lists the CVs supported in the H15/16-
44 decoder. Both CV numbers and Register numbers are provided for
cross-reference.
Some CVs (such as CV29) have specific meanings for each bit. To
conform to the NMRA convention for bit numbering, the CV bit
assignments shown in this table use the bit-numbering scheme of 0 to 7.
Table 1: Configuration Variables (CVs) for the
H15/16-44 Decoder
CV Reg. Description Range Default
Value
**
1 1 Short address:
This is the number that you enter into your DCC
system to tell it which locomotive you wish to run
with a short (2-digit) address.
1-99 3
2 2 Start voltage:
This is the voltage applied to the motor in speed
step 1. Set this value so that the locomotive is
barely moving in speed step 1.
0-31 8
3 3 Acceleration Momentum:
Determines the rate of change of speed upon
acceleration. A higher value leads to a slower
acceleration.
1-255 1
4 4 Brake Momentum:
Determines the rate of change of speed upon
braking. A higher value leads to longer braking
distances.
1-255 1
- 5 Contains CV29 (see definition of CV29 below)
0-55 6
- 6 Page Register:
Normally this Register is not modified directly by
a user. For correct operation, R6 should be set to
have the value “1” after any use.
0-127 1
7 7 Version Number:
This location stores the version number of the
decoder. This CV is read-only.
- 46