Atlas 520099 manual Creating a Customized Speed Curve

Decoder for Atlas N Scale H15/16-44 Locomotives 15

Creating a Customized Speed Curve

Common reasons for specifying a customized speed curve for a DCC- equipped locomotive are to:

(1)Insure that dissimilar locomotives have the same performance characteristics

(2)Have model locomotives perform more prototypically

In this example of creating a customized speed curve, we will assume that the H15/16-44 decoder has been properly installed and tested. We also assume that you are familiar with the general process of programming CVs using your DCC system.

The first step in creating a customized (non-default) speed curve is to assign a value to each internal speed step. This assignment is done by specifying a value for each of the CVs from CV67 to CV94 using a table such as that below, but substituting your desired speed step settings for the default CV values given in the Internal Speed Step Value column of this table.

The second step in creating a customized speed curve is to write the value listed in the Internal Speed Step Value column into the CV corresponding to that speed step.

The third and final step is to activate your customized speed curve by writing the binary value “1” into bit 4 of CV29 (i.e., CV29.4 =1). Unless this bit in CV29 has been set to a binary 1, the default speed curve that was preset into the decoder at the factory will be used.

Atlas Model Railroad Co., Inc.