Proto GP-27

Discussion in 'DCC & Electronics' started by snick, Oct 29, 2006.

  1. snick

    snick New Member

    I have a Proto GP-7 DCC with sound. I use a MRC Prodigy DCC System. The engine runs foward in reverse and reverse in foward. I know there is a way to change the direction of the loco, but I don't remember which cv it is. Can anybody help me???
  2. tweet469

    tweet469 New Member

    CV-29 adding 1 to the # already programmed is supposed to change the direction What decoder do you have installed? I don't think it makes any differnce. Tweet.
  3. Rusty Spike

    Rusty Spike Member

    I use the Prodigy system - there is a single programming button that is labeled "Polarity" or so I think (I'm not at home right now). Put the engine on the programming track, move the switch on the main unit from run to program and hit that button one time. Switch to "Run" again and test it. I think that will do it.

    Does the back of the hand held give instructions in case mine are not quite accurate?
  4. snick

    snick New Member

    I tried adding #1 to cv29, did not work. Which is the front of a GP-7, the end with the cab or the other end?
  5. JAyers

    JAyers Member

    Depends on the road and era. But mostly the short end. GTW ran long hood forward for many years.

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