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Premium Member
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Hi All,

I have hit a slight snag with the Athearn HO loco i am converting to DCC the track and motor wires are settled in though i needed to change CV29 to reverse the direction of the motor after fitting an led to the front white wire it works ok on address 03 .... after giving it the address of 6773 it reverts back to 03 and the light ceases to work i then did a rest on the decoder to make sure factory settings were restored ......three times i have been through this cycle and now am at a loss as to the problems ....one thing did come to mind does the decoder have a limit to the highest address it can be set to, the LED works ok off a battery and attaching it for testing to the yellow wire makes bo difffernce.

The decoder is a Digitrax DZ143 and throttle NCE Powercab

Any help would be appreciated.

Many thanks.
 

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Just another modeller
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*** The address limit is 9999 so thats not an issue. (1) check what you are setting CV29 to. If you make an error in the value there you will also change the decoder to 14 speed steps which will give U light problems. If you are currently doing these changes on the main stop, try once more and just follow the NCE prompts for initial decoder set-up in programming track mode and in that one programming sequence do address and reverse direction.

if you still have problems look at CV29 on the programming track. If its not there already change it to 39.

If that doesn't work then try another decoder - but while you are at it, change the loco to run in the right direction when forward is selected so you don't need to play with CV29.

Richard
 

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Discussion Starter · #3 ·
QUOTE (Richard Johnson @ 4 Jan 2009, 03:43) <{POST_SNAPBACK}>*** The address limit is 9999 so thats not an issue. (1) check what you are setting CV29 to. If you make an error in the value there you will also change the decoder to 14 speed steps which will give U light problems. If you are currently doing these changes on the main stop, try once more and just follow the NCE prompts for initial decoder set-up in programming track mode and in that one programming sequence do address and reverse direction.

if you still have problems look at CV29 on the programming track. If its not there already change it to 39.

If that doesn't work then try another decoder - but while you are at it, change the loco to run in the right direction when forward is selected so you don't need to play with CV29.

Richard

Thanks for the advice Richard


I tried CV 29 to the value of 39 still no difference and so i swapped the grey wire to the underside and orange top as you suggested reset the decoder to factory readdressed it and now everything is working well.

I was willing to swap the wires over but in the past converting the same loco type orange to the bottom has worked without a hitch.

Many thanks once again.
 
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