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Inverting F8 on a Rivarossi U28C w/ LokSound Select

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  • Member since
    June, 2018
  • 3 posts
Inverting F8 on a Rivarossi U28C w/ LokSound Select
Posted by fitek on Monday, June 11, 2018 12:53 PM

I bought a Rivarossi U28C with a LokSound Select decoder.  I'm using a Roco DCC controller which only has f0-f4 so I can't get the engine sounds to start from the remote.  On my Intermountain ES44AC I inverted F8 so the engine starts on track power.

However, I've had no luck with the U28C.  I've found 3 different procedures to invert F8 (in the online full Loksound manual, the Rivarossi branded paper instructions, and another on some forum).

The working sequence with the Intermountain loco is cv32=2, cv403=32, cv13=2.  Another doc mentions setting cv419 instead of 403, and a forum post said to set it to 16 instead of 32.  Have tried it all, no go.

All those do is change the color of the center light!

I sent messages to Rivarossi and ESU but no reponse.

Any ideas?

This is the u28c FYI:

http://mrr.trains.com/news-reviews/staff-reviews/2016/06/rivarossi-u28c-diesel-locomotive

  • Member since
    June, 2018
  • 3 posts
Posted by fitek on Tuesday, June 12, 2018 12:17 PM
I spent another hour on this last night. Page 52 of the 4.0 manual lists the CV addresses. Trouble is I don't know which one it is for this Rivarossi. I tried 387, 403, 467 to no avail. One other procedure mentioned setting CV31=16 prior to setting the index register 32. So far I've only been able to make two concrete changes: center light blinks red instead of solid white, and some combo of CV changes made the coupler clank sound play on track power (which is F3 IIRC). Unfortunately I didn't write down which combo did that...
  • Member since
    February, 2002
  • From: Reading, PA
  • 24,871 posts
Posted by rrinker on Tuesday, June 12, 2018 2:18 PM

CV13 has no bearing here, that is for analog operation.

The problem is figuring out which line int eh function mapping table is used for CV8 mapping. That's dependent on the sound project. 403 and 419 are the proper CVs (after setting CV32=2 for indexing) but it also could be 387, 371, 355, or maybe 435 or 451.

32 is the value you want - 32 means F8 is off. 16 means F8 is on, which is what it should be currently set to. Brute force, check each CV from 259 to 499, in increments of 16 ( so 259, 275, 291, etc.) and see which one is set to 16. If it's 16, make it 32. Unless you have some other way to read the decoder, such as JMRI and a suitable interface, or a Lokprogrammer.

                               --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
  • 3,867 posts
Posted by BigDaddy on Tuesday, June 12, 2018 5:28 PM

If Randy's suggestion doesn't work, there is a Yahoo ESU Group.

You have to apply to join and it may take a day or so for your post to be seen.  Yahoo Groups used to be much more user friendly than they are now.

 

 

Henry

COB Potomac & Northern

By the Chesapeake Bay

  • Member since
    April, 2004
  • From: Ontario Canada
  • 3,149 posts
Posted by Mark R. on Tuesday, June 12, 2018 5:46 PM

This "should" work. Set the following in this order ....

CV31 = 16, CV32 = 2

----------------------

CV435 =  32

 

Mark.

¡ uʍop ǝpısdn sı ǝɹnʇɐuƃıs ʎɯ 'dlǝɥ

  • Member since
    June, 2018
  • 3 posts
Posted by fitek on Tuesday, June 12, 2018 7:22 PM
Thanks Mark and Randy! You guys rock! Mark's procedure did the trick. I then set the engine volume via cv32=1, cv259=50 and cv267=50.

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