DH121 - speed steps

greenspun.com : LUSENET : Wiring for DCC : One Thread


I have an Empire Builder set (Digitrax of course) and so far only one decoder equipped loco (that being a DH121). I have recently found out from Digitrax customer support that to activate the speed table, and Vmax and Vmid, that is to say to make CVs 5 and 6 activate i had to status edit the system to 28speed steps. This i did. Now on my throttle, the %speed jumps 3 steps every turn of the knob. However, nothing happens until i reach the fourth speed step (ie 12% speed). Prior to status editing, i had set up CV2 to some value so that as soon as I got to speed step 1, the loco was moving. Now, no matter what value i have in CV2, nothing happens until i reach the 4th speed step. If CV2 is set to 100, then the loco just takes off, if set to 5, then it crawls. How can i get those 3 lost speed steps back (that is how do i get the loco moving at the first speed step)?

Thank you in advance for your assistance.

Claude Quesnelle

-- Claude Quesnelle (claude.quesnelle@bms.com), March 26, 2004


If your sequence description is correct, you still have the speed table activated but you want to use CVs 5 & 6. You need to de- activate the speed table so that CVs 2, 5 & 6 describe the speed profile.

-- Don Vollrath (dvollrath@magnetek.com), April 19, 2004.

Moderation questions? read the FAQ