Diesel Version 5:CV 119

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NMRA CV 119
DC Mode Motor Start Voltage
Range of Values0-255
Default Value85

NMRA CV 119 - DC Mode Motor Start Voltage

This CV controls what the track voltage must be on the rails while in DC mode before the decoder motor will turn on and start running. If this value is too low you may find that the decoder will try to move and then shut off, sometimes repeatedly. If you see this behavior increase the value in this CV.

The oscillation that you may see can be caused by old DC power packs which are not filtered/output smooth DC power. Additionally when the motor turns on the increased current draw will cause the voltage on the track to drop, which could cause the decoder to power down or oscillate.

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