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Decoder conflicting problems

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  • Member since
    January, 2016
  • 18 posts
Decoder conflicting problems
Posted by LogginLocos on Sunday, August 06, 2017 6:49 PM

ok so i got a rivarossi heisler with factory dcc sound. for some reason it seems to conflict with other decoders and the locomotive right next to it will start moving and continue to speed up untill i pull it of the track. all locomotives with digitrax decoders seem to do this. nothing else will.  

  • Member since
    February, 2002
  • From: Reading, PA
  • 22,819 posts
Posted by rrinker on Sunday, August 06, 2017 7:23 PM

 Sounds like maybe it's pulling the DCC signal down and the other locos are seeing DC and switching to analog operation - set DC off in those decoders by adjusting CV29 - if it's 38 or more, subtract 4 and make that the new value. That should stop the others from taking off. As to why the Heisler does this - could be any number of things. It could just be tight gears or gummed up lubricant causing it to draw excessive current.

                                  --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    December, 2015
  • 1,994 posts
Posted by BigDaddy on Sunday, August 06, 2017 7:30 PM

In my machinations today with my RS installation, I managed to set 2 other DCC locos as well as the RS to addy #3.  They all started at once.

Henry

COB Potomac & Northern

By the Chesapeake Bay

  • Member since
    May, 2004
  • 4,175 posts
Posted by 7j43k on Sunday, August 06, 2017 8:46 PM

Guess it must be the Official Work on Decoders day.

I've been doing work on speed tables and CV29 and adding momentum.  Nothing bad has happened.  That I know of.

Also coincidentally, it appears to also be official Alco RS Day; as I'm working on my three SP&S RS-3's.

 

Ed

  • Member since
    January, 2016
  • 18 posts
Posted by LogginLocos on Sunday, August 06, 2017 8:56 PM

i decided to read the cv and it was just 6. what should i do? should i still subtract 4?

  • Member since
    March, 2015
  • 910 posts
Posted by SouthPenn on Sunday, August 06, 2017 9:29 PM

This is the digitrax decoder manual. Scroll down to page 34 and you will find a chart that list all the settings for CV29. These settings should work on any decoder.

South Penn
  • Member since
    February, 2002
  • From: Reading, PA
  • 22,819 posts
Posted by rrinker on Monday, August 07, 2017 6:55 AM

LogginLocos

i decided to read the cv and it was just 6. what should i do? should i still subtract 4?

 

 Yes. A value of 2 means short address, 28/128 speed steps.

                     --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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