81
For a simple sound decoder like the older DSX, the throttle’s function keys are mapped to the
following decoder functions and effects:
F0 turns on the headlight (direction key selects front and back);
F1 turns the bell on and off;
F2 controls the horn;
F3 turns on the coupler sound;
F4 turns on the fans.
Next, add a column for each locomotive and be sure to include it's decoder's primary address, not
the consist's address. You need the locomotive decoder's primary address in order to send OPS
programming commands to it.
There is a section for both CV-21 and CV-22. Note that the SDX decoder uses CV-22 for only the
F0 light controls.
Once the table is complete, put a YES if you want the locomotive to respond to the function
command or leave the entry blank if you do not want it to respond.
Below is a chart filled out with how each locomotive is to respond to the function commands
when all three are in Advanced Consist number 91.
The next page summarizes how the CV values were derived.
Customizing Decoder Functions In An Advanced Consist
Trailing
Unit
Middle Unit Lead Unit
1891r 51n 1891n
F1 CV-21 0 1 Bell Yes
F2 CV-21 1 2 Horn Yes Yes
F3 CV-21 2 4 Coupler
Sound
Yes Yes Yes
F4 CV-21 3 8 Fans Yes Yes Yes
F5 CV-21 4 16
F6 CV-21 5 32
F7 CV-21 6 64
F8 CV-21 7 128 Mute Yes Yes Yes
2+4+8+128 4+8+128 1+2+4+8+12
8
142 140 143
F0-f CV-22 0 1 Headlight Yes Yes
F0-r CV-22 1 2 Backup
Light
F9 CV-22 2 4
F10 CV-22 3 8
F11 CV-22 4 16
F12 CV-22 5 32
CV 22
Decimal
Value
1 0 1
CV21
Decimal
Value
Advanced Consist #91
Key CV Bit Weight
DSX
Function
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