Decoder for Atlas N Scale H15/16-44 Locomotives
3
Atlas Model Railroad Co., Inc.
The H15/16-44 decoder has four function outputs: A, B, C, and D.
Decoder outputs A and B are designed to control the white LEDs used
for the front and rear headlights, respectively, in these locomotives. The
front and rear headlights can be configured by Bit 0 in CV51 to be either
directional or independently controlled. It is also possible to dim, using a
DCC function, either directional headlights or independently controlled
headlights.
If the headlights are configured for independent control, the front
headlight may be configured with the appropriate bits in CV51 to operate
as a Gyro light, a Mars light, a single pulse Strobe light, or a dual pulse
Strobe light. Similarly, when the headlights are configured for
independent control, the rear headlight may be configured with the
appropriate bits in CV57 to operate as a Gyro light, a Mars light, a single
pulse Strobe light, or a dual pulse Strobe light.
Decoder outputs C and D are designed to control the bi-color LEDs
used for the front and rear marker lights in these locomotives. Decoder
outputs C and D are auto-reversing so that the bi-color LEDs show
green in the direction that the locomotive is traveling and red in the
opposite direction. The only control over these marker lights is on or off.
By default, function F2 is used to turn these lights on or off. If desired,
this default setting can be changed simply by modifying CV54; by writing
the proper value into CV54, the marker lights can be switched on or off
by any function F1 through F8. If you are using a DCC system where
function F2 is momentary (e.g., Digitrax), it is recommended that you
remap F2 to another function with on/off control.
If you are using an NCE Power Pro DCC system, you will need to
change the values of two parameters in your command station to get
proper operation of the H15/16-44 directional marker lights. The Number
of Temp Packets must be changed from 5 to 8, and the Function Repeat
Rate must be changed from 0 to 250. Refer to the NCE System
Reference Manual for instructions on how to change the values of these
parameters.