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Decoder for Atlas N Scale H15/16-44 Locomotives
17
Atlas Model Railroad Co., Inc.
Troubleshooting Decoder Programming Problems
Fault Cause and Solution
Locomotive does not
move when you
address it on DCC
system.
Check to see if you have selected the correct address for that
locomotive.
Locomotive does not
move when DCC
system is set to the
address in CV1, even
though this address can
be read from CV1.
You have entered the short address (CV1), but the decoder is set to
use the long address, i.e., bit 5 of CV29 has been set.
Use the long address or else clear bit 5 of CV 29.
Locomotive does not
move when DCC
system is set to the
short address in CV1.
The short address can
be read from CV1, and
DCC functions can be
activated when the
DCC system is set to
the address in CV1.
Check to see if an advanced consist address has been
programmed into CV19, i.e., check to see if CV19 has a value
greater than 0. If CV19 has a non-zero value, you must either use
this advanced consist address to operate the locomotive or program
the value 0 into CV19.
DCC functions can be
activated when DCC
system is set to the
locomotive address, but
the locomotive does not
move.
Decoder is set to use a customized speed curve (CV29.4 = 1), but
you entered zero values into CVs 67 to 94. Either clear bit 4 of
CV29 or enter suitable non-zero speed step values into CVs 67 to
94.
The locomotive does
not appear to be using
the customized speed
curve values that you
have entered into CVs
67 to 94.
Bit 4 is not set to “1” in CV29.
Function 0 (lighting)
cannot be switched on
and off.
Matching of speed steps is incorrect: The decoder has been set to
28/128 speed steps, but the DCC system has been set to 14/27
speed steps.
Either set the DCC system to 28/128 speed steps or change the
decoder speed step setting to 14/27 speed steps. (CV29.1 = 0).
Locomotive headlights
are only illuminated
when the locomotive
speed is increased or
decreased; the
locomotive headlights
go on and off as the
locomotive speed
changes.
Matching of speed steps is incorrect: The decoder has been set to
14/27 speed steps, but the DCC system has been set to 28/128
speed steps. Either set the DCC system to 14/27 speed steps or
change the decoder speed step setting to 28/128 speed steps.
(CV29.1 = 1).