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Torque compensation kick strength - CV117:
How hard the motor is 'kicked' at slow speed. Typical adjustment is 4 to 25 The larger the number the
more voltage is applied in each 'kick'. The strength of these kicks fade out ratiometrically as speed is
increased providing a smooth transition to normal motor operation. Factory default is 0 (off), usable
range 0-50.
Vmax - CV5: If your locomotive runs too fast you can use CV5 to lower its maximum speed. Setting CV5
to 255 uses the maximum possible voltage to run the motor when full speed is requested. Set CV5 to a
smaller value to reduce the top speed. A value of 128 will yield approximately ½ full voltage to the
motor at top speed. 192 will provide about ¾ full voltage. All speeds from the middle speed step to the
maximum will be proportionally reduced. If CV5 is set to 0 the decoder will use 255 for maximum speed.
Always make sure CV5 is greater than CV6 to avoid erratic operation.
Vmid - CV6: CV6 determines how the motor responds through its middle speed ranges to advancement
of the throttle. If you set CV6 lower than half the maximum speed you'll have smaller increases in motor
speed through the lower speed ranges. Then, as you hit the upper speed ranges there will be larger
increases between speed steps. If you set Vstart larger than 0 you'll will most likely want to raise Vmid
so a reasonable slope is maintained in the 'speed curve'. If CV6 is set to 0 the decoder will use 127 as the
value. If you use high values in CV117 you will want to increase CV6 by a proportional amount to keep a
smooth acceleration curve.
Reverse trim (also forward trim) - CV95:
Values from 1-127 make decoder run faster in reverse than forward. 1 is one speed step faster in
reverse, 2 is two steps faster, etc.
Values from 129-255 make decoder run faster in forward than reverse. 129 is one speed step faster in
forward, 130 is 2 speed steps faster, etc. 0 and 128 add nothing to either direction .
As an example, here are the settings I use on my SW1500 Switcher, CN7035 NCE SW9-SR Decoder.
Install date: Feb 1 and Feb 2 2018.
The DCC Command Station I use is the NCE PH PRO 5 Amp and Pro Cab.
CV30 Set this CV to 2 on the programming track and the decoder will reset to factory settings.
Date: Feb 2 2018
Setting CVs
Short address = 3
Long Address = 7035 (your road number)
CV 2 = changed to 15 on Feb 3 2018 (was 10)
128 speed steps
Manufacturer = 11
Dir Mode
Decoder version = 35
Active Address Long
Short Address = 3
Dir bit = norm
DC Mode No
Standard Speed Table
Install an NCE SW9-SR mobile Decoder into an P2K SW1500 switcher.
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