Comments on: Starting Voltage vs. CV2 https://blog.model-train-help.com/2022/01/starting-voltage-vs-cv2.html?utm_source=rss&utm_medium=rss&utm_campaign=starting-voltage-vs-cv2 Model railroads and model trains Thu, 20 Jan 2022 13:11:31 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Clif https://blog.model-train-help.com/2022/01/starting-voltage-vs-cv2.html#comment-56423 Thu, 20 Jan 2022 13:11:31 +0000 http://blog.model-train-help.com/?p=6417#comment-56423 In reply to Hervey.

First of all, thanks for your timely response. One other question. My MCR Prodigy Advanced 2 asks for a SV and then later on asks for CV2. Are they the same? Sorry to bother you, but would appreciate clarification. Thanks in advance. Clif

]]> By: Hervey https://blog.model-train-help.com/2022/01/starting-voltage-vs-cv2.html#comment-56417 Thu, 20 Jan 2022 05:07:30 +0000 http://blog.model-train-help.com/?p=6417#comment-56417 CV 2 sets the starting voltage for the decoder. Generally a low number. It also determines the start of the speed curve. That is useful when you are trying to speed match 2 or more locos.
CV 5 is the maximum voltage the decoder will supply to the motor. (FYI it isn’t actual volts but pulses but for the sake of this I will call it voltage). It is the value that sets the maximum speed of the loco and must be greater than CV6. When you plot C Vs 2, 6, and 5 on a graph of speed step as the X axis and motor power as the Y axis the resulting line (curve) is your speed curve.
CV2 determines when the motor starts to turn. CV 6 determines what speed the loco will move at at mid throttle. CV 5 determines loco speed at maximum throttle.

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