View source for Diesel Version 5:3 Point Speed Curves Feature

===Overview===
In most applications of acceleration and deceleration the rate at which a locomotive increases its speed forms a curve where the early speed steps do not increase the speed as rapidly as later speed steps. For most applications a simple 3-Point Speed Curve will be more than adequate to create the prototypical movement of most locomotives. To this end, this Speed Curve employs 3 CV’s, each defining the rate of speed of a given range of speed steps. Using the Start Volts, Mid Volts, and Top Volts, the speed steps from 1-128 are divided into three equal sections. Adjusting the values in the corresponding CV’s shifts the standard speed curve up or down (within the specific range) thereby creating an entirely new rate of speed from each speed step to the next. 

===Adjustment===
To enable 3 Point Speed Curves, [[Diesel Version 5:CV 29|CV29]] Bit 4 must be cleared. This is the default configuration in TCS decoders. To begin using and setting up the 3 Point Speed Curve, simply program values into CV 2 (Start Volts), CV 6 (Mid Volts), and CV 5 (Top Volts). The Speed Curve is defined in CV’s 2, 6, and 5 with each CV corresponding to approximately 1/3 of the speed range. Values may range from 1-255 and every value of 18 added to one of the Speed Curve CV’s adds (approximately) 1 Volt to the motor speed at the CV being adjusted. 

''NOTE: The 3-Point Speed Curve does not allow for parabolic speed curves. That is to say each consecutive CV in the curve must have a value higher than, or equal to, the CV before it on the curve. CV 5 must not be less than CV6, and CV 2 must not be greater than CV6 when CV6 is also in use. See below for the exact limitations on each CV.'' 

''NOTE: Note: CV2 may be employed independently of CV5 and CV6, and is always able to be used regardless of the configuration of CV29.''

{{{{NAMESPACE}}:CV_2}}
{{{{NAMESPACE}}:CV_5}}
{{{{NAMESPACE}}:CV_6}}