Author Topic: Newbie DCC question  (Read 1104 times)

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mecgp7

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Newbie DCC question
« on: August 28, 2013, 07:28:22 PM »
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I have the Digitrax Zephyr system. Just tinkering with some DCC locos and one of the locos goes in the opposite direction than the others when I turn up the juice.
Can it be programmed to run like the rest (directionally) or does there need to be a correction to the TCS decoder.
My apologies if this is a dumb question, but I have literally just taken the DCC system out of the box.
CG

Bendtracker1

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Re: Newbie DCC question
« Reply #1 on: August 28, 2013, 08:50:52 PM »
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Not a dumb question at all.

Depending on which you installed, there are several options.

If it's a hardwired chip, then you can reverse the Gray and Orange wire where you soldered it to the motor tabs.
If it's a CN or CN-GP chip, you reverse the Gray and Orange wire where you soldered it to the motor tabs.
If it's a drop-in chip, then there isn't any wires to reverse.

If all fails you can reprogram the chip so that the motor runs in the opposite direction by adjusting CV29.

Here is a link to a calculator where you can just choose the options you want within CV29;
 http://www.2mm.org.uk/articles/cv29%20calculator.htm

Notice the first option;  "Reverse Direction"  place a check mark on this option and notice how the number at the bottom changes.

Now go through and check or uncheck all the options that you want.  At the bottom of the page it says "CV29 Value"  the number just to the right is the value you need to program CV29 with.

I'm not sure of the actual process of using the Zephyr to change the CV for this with as I have the Chief.

Hope this helps?
Maybe someone with a Zephyr can help jump in and explain how to do this with the Zephyr.

mecgp7

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Re: Newbie DCC question
« Reply #2 on: August 30, 2013, 02:49:54 PM »
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Thanks Allen.

Bendtracker1

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Re: Newbie DCC question
« Reply #3 on: August 30, 2013, 09:23:57 PM »
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Sure!