I've just purchased an Athearn GP38-2 with sound. I want to run it "long hood forward" (as Southern often did), but when my controller says "forward", it goes short hood forward. I'm a real dummy when it comes to understanding cv's. I can do the "basics", such as setting momentum, start voltage, etc. When I went to the Technical Manual, they're talking about "bit this and that", which I don't understand at all. Can anybody tell me what CV to change, and what do I change it to? Without changing anything else? I just want my engine to go "backwards" when it says "forward". Can I do that??
Mike C.
Add 1 to whatever value is already in CV29.
For example, if CV29=34, and 1 so that CV29=35.
Rich
Alton Junction
Depending on how your lighting is configured, you may also have to remap your front and rear lights to match your new direction of travel. If you use directional lighting, it may now work opposite to what you desire.
Mark.
¡ uʍop ǝpısdn sı ǝɹnʇɐuƃıs ʎɯ 'dlǝɥ
Looking at the CV default list in my manual (factory installed Tsunami), CV29 is called "Configuration Byte 1". It's default value is 6. Does this mean, for CV29, I enter "1" or "7"? Also, has anyone heard of turning on the "automatic signals"? It's my understanding that with this enabled, a sudden "goose" of the throttle sounds a grade crossing horn signal. Anybody tried THAT one? I can't figure this manual out to save my butt!
Tsumani actually calls CV29 "Configuration Register 1".
In your situation, you would change the value of CV29 from 6 to 7.
Here is a link to a discussion which will help you.
http://www.allpointsnorthmrrc.org/files/tech/DCC_Decoder_Prog.pdf
I refer you specifically to Page 5 which explains CV29 and how to program it.
As you look at the 8-bit structure, note that the value of 6, the default factory setting, is accomplished by turning on Bits 1 and 2. Don't let the 1 in parentheses confuse you, it is an internal setting for ON. What is important is that by turning on bits 1 and 2, a value of 6 is achieved (look at that table of bit values). That results in the 28/128 speed table being activated, and DC operation being authorized.
By changing the value of CV29 to 7, you have turned on Bit 0 which adds 1 to the value of CV29 and reverses the direction of the motor.
Incidentally, I never use the value of 6 or 7 in CV29. For one thing, I want to use long addresses, and I do not want to authorize DC operation. So, I use a value of 34. If I wanted to activate operation of the motor in reverse, I would set the value of CV 29 to 35. Can you see how and why you would program those values into CV29?
CV29 set to 6 or 7 leaves DC operations mode on and is only for a 2 digit address -- for better results, set CV29 to a value of 35, which is DCC Operation Only if you have it set for a 4 digit address.
If you want the grade crossing sound program CV195 to between 3 and 10. Try various values. Program CV198 to 1. If you want the auto bell and horn signals as well program CV198 to 7 instead. Program CV193 to 1 and CV194 to 10. This will cause the horn to sound when starting out and the bell to ring starting at speed step 1 and going off at speed step 10. CV194 can be any value you want as this is the speed step the bell stops ringing at. Down load the Tsunami diesel manual from Soundtraxx web site. It has a table for CV29 in it. Joe
Many thanks to you guys for your help! Because of your info, I have been able to turn on all of the features I wanted to try. Some I turned back off because I didn't want them, after all. Anyway, after "playing around" a little, I think I'm beginning to understand a lot more about how this thing works! I have turned on the "automatic brake" sound, which sounds good, AND I've turned on and programmed the brake function, which works really well. Now, when I hit F9, the brake sound comes on, AND the loco slows to a stop until I press F9 again. This is all just too cool! Again, Thanks!