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Start Voltage/Decoder Confusion

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  • Member since
    March 2019
  • From: Bethlehem, PA
  • 53 posts
Start Voltage/Decoder Confusion
Posted by HO Hobbyist on Wednesday, April 22, 2020 5:39 PM

Hi All,

I hope you're staying safe and getting a lot done on the railroads!

I just acquired a new Proto 2000 GP18. It has DCC but I don't know what brand. I plan on consisting it so I need to program the start voltage down (it starts moving at 30). When I read CV8 the value is 8, which doesn't code for any certain manufacturer. Any help? Should I just take the shell off and look at the decoder?

 

Modeler of the Lehigh Valley Railroad in Bethlehem PA, 1971 and railfan of Norfolk Southern's Lehigh and Reading Lines of the modern day.

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  • Member since
    October 2007
  • From: ohio
  • 1,371 posts
Posted by rs2mike on Wednesday, April 22, 2020 5:49 PM

What system are you using?  I use the nce power cab.  If i go to program track menu and select 1 it will show me the decoder manufacturer number.  Then I go online and check who makes it. 

alco's forever!!!!! Majoring in HO scale Minorig in O scale:)

  • Member since
    December 2015
  • From: Shenandoah Valley
  • 9,094 posts
Posted by BigDaddy on Wednesday, April 22, 2020 5:51 PM

NCE Zendesk says BLI is 8, don't know why that would be in a Walthers locoedit I must have been having a senior moment when I read that, but it's not there now.

but be that as it may, the relevant CV is 2 for starting voltage.  What do you read there?

When you say it moves at 30, that is speed step 30?  

Henry

COB Potomac & Northern

Shenandoah Valley

  • Member since
    March 2019
  • From: Bethlehem, PA
  • 53 posts
Posted by HO Hobbyist on Wednesday, April 22, 2020 10:10 PM

BigDaddy

.b..be that as it may, the relevant CV is 2 for starting voltage.  What do you read there?

The reason I was trying to find out the manufacturer is I wasn't aware there was a standard. I thought that like sounds the CV numbers would vary. Thank God for the NMRA to keep this all standardized!

And yes, I meant speed step 30.

Modeler of the Lehigh Valley Railroad in Bethlehem PA, 1971 and railfan of Norfolk Southern's Lehigh and Reading Lines of the modern day.

http://hohobbyist.weebly.com

https://www.youtube.com/channel/UCIYnPo26Y8nsXyKhtpvSWwA

http://instagram.com/lvrr_hoscale

http://twitter.com/lvrr_hoscale

"When railroading time comes you can railroad...but not before."

- Robert A. Heinlein

  • Member since
    October 2005
  • 1,033 posts
Posted by betamax on Thursday, April 23, 2020 9:05 AM

HO Hobbyist

Hi All,

I hope you're staying safe and getting a lot done on the railroads!

I just acquired a new Proto 2000 GP18. It has DCC but I don't know what brand. I plan on consisting it so I need to program the start voltage down (it starts moving at 30). When I read CV8 the value is 8, which doesn't code for any certain manufacturer. Any help? Should I just take the shell off and look at the decoder?

 

Seeing how there is no Manufacturer ID assigned to 8, you must be looking at the wrong CV.  BLI is 38. The complete list is here.

V Start is CV2, and a good place to start. You should identify the decoder, which should be in CV7, after you determine the manufacturer. Knowing which decoder was installed helps a lot. Some OEM versions are lacking in features.

Be warned: Not all CVs are mandatory, so some features may not be available.  If the decoder uses indexed CVs that can also get interesting.

Tags: DCC , CV , decoder

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