I know I'ved asked this question before but the 1 answer I recieved only kind of explained CV 29 but didn't explain how to fix my problem. I have 1 engine which backs up about a foot when I turn on my NCE system, even if it wasn't the last engine I ran. NCE told me I needed to disable dc by going into CV 29 but wouldn't tell me how. Does anyone know what I need to do? Thanks
http://www.2mm.org.uk/articles/cv29%20calculator.htm
Cv 29 calculator. Check the boxes you want, and uncheck the others. CV 29 value at bottom is what you should want CV 29 set to.
Just subtract 4 from the current value of CV29. So, for example, if the current value of CV29 is 38, change it to 34.
Rich
Alton Junction
Mike,
Did you use your Power Cab in Programming track mode to read back the value for CV29, as I suggested in the other thread?
http://cs.trains.com/mrr/f/744/t/265249.aspx
If you know what the value of CV29 is then you'll know what is activated. If the default is "6" then subtract four from that number and enter "2" to turn off dual-mode or analog operation. To also reverse the direction of your locomotive: Add one to that value, or "3".
As mentioned, the value you enter in for CV29 is a summation of features. I'll repost this again: (default)...[activation value]
So, every value is unique and it's sum total will tell you exactly what features have been activated and which ones have not. You have to understand what a CV controls first before you start punching in values.
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
All of this add or subtract from the value after you read the existing number from CV 29 will work. However, going to the link I referenced above where one can see what conditions one wants and have the value calculated automatically seems much easier to me.
Yes, because unless it was a brand new loco, or you programmed it with typical defaults yourself, the starting value makes a difference when you add and subtract. Say the previous owner already reversed the NDOT. So your loco runs 'backwards'. If you ADD 1 to CV29, you'll make 3 changes - NDOT will switch back, but you will also change 28/128 speed steps to 14, and you will turn DC operation back on!
I thought NCE had a menu selection for CV29 where you basically answer the questions on the calculator web site so you didn't have to figure out the value to use? I know it handles short/long address automatically, like most any other system, but I thought they also had the extra stuff ina menu.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
rrinker I thought NCE had a menu selection for CV29 where you basically answer the questions on the calculator web site so you didn't have to figure out the value to use?
Well, yes it does, and no it doesn't. It does if you go through the standard programming from the beginning. But it does it in the background, meaning that the value in CV 29 changes as you answer the questions but there is not a visible indication of what is happening. You can also access a CV individually and change it manually.
So in this case where the question was what is the value to enter into CV 29, easier to just look at the calculator, answer the questions, and be given the value. Especially if the initial value of CV 29 is not known.
Not that I'm aware of, Randy. You can read CV29 back in Programming track mode but there is no menu for each function associated with CV29.
[Correction: There is a menu option for CV29 with the Power Cab. It's accessible in Programming track mode right after programming the short and long addresses. Press "1" for "Yes" when you see the "Set Config" screen and it will take you through the menu for CV29 mentioned by Henry below.]
As you are aware, Randy, TCS conveniently lists all the functions in each decoder manual for CV29, which I find very convenient. I just add up the values of the functions I desire and enter that sum. Pretty straightforward.
I have to disagree with Tom, which is surprising, but maybe we are talking about apples and oranges.
On the programming track menu on my Power Cab, CV 29 is specifically mentioned on page 50 of the manual https://ncedcc.zendesk.com/hc/en-us/articles/201565799-Power-Cab-ManualsV 1.65 1MB download. Be informed there are multiple manuals, supplements and additions to manuals.
There are choices for all the variables that comprise CV 29 address. When you make all the choices, it calculates CV 29 in the background to get it to do everything you just chose.
Henry
COB Potomac & Northern
Shenandoah Valley
Thanks for that correction, Henry. How about that! Although I'll probably still figure it up myself, it's nice to know that there is a menu option for CV29 for the Power Cab.
BigDaddyWhen you make all the choices, it calculates CV 29 in the background to get it to do everything you just chose.
Yes, it does do that, but in the background as I mentioned above. It does not tell you what the final value of CV 29 is unless you read back that value. And the original question was "what is the value".
And, again, that depends on what functions the OP ultimately wants in CV29. If the OP can use the menu option with the Power Cab for figuring that out, maybe that's the best route for him.
maxman And the original question was "what is the value".
That wasn't the OP's original question. I suppose we are not allowed to know the answer to that one.
In this decoder manual, scroll down to page 34 and pick your CV29 setting.
BigDaddy I suppose we are not allowed to know the answer to that one.
Correct. You have to belong to the society with the secret handshake.
And yes, you are also correct that that was not his original question. He wanted to know what to do. Thought I did that in the simplest form, but I guess not.
Me bad.
I think that everyone needs to settle back and relax and wait to hear from the OP.
By the way, where is the OP? Mike???
https://www.youtube.com/watch?v=0-JA1ffd5Ms
Sorry I didn't get back in to the discussion, it got a little technical for me, plus my real name isn't Mike. Anyway went back to CV29 found out it was 38, changed it to 34 and problem solved. Thanks guys, BTW my name is Bruce