I have an original Tsunami in a P2K 0-8-0 and cannot slow it down at the top end. It seems to have a set speed at the top end (which is faster than I want but not out of control....about 65 smph which is faster than I want).
The decoder will respond to preset speed table settings and I can influence the lower speeds when doing my own table on D Pro, but no matter what value I give the top end, I cannot change the top speed. Of course the Tsunami does not have a CV 5 or 6 for me to adjust.
Am I missing a controlling CV somewhere here?
I am using a Zephyr controller.
Thnaks.
Try programming a value of 15 into CV 25 and see what happens.
Even though the Tsunami does not have CV 5 it does have 15 different speed tables already installed from which you can choose according to the value you put into CV 25. A value of 15 tells it to use Exponential Speed Table #6.
Download the Tsunami Technical Reference Manual from the SoundTraxx web site and read the section on CV 25. They have a graph showing the different speed curves according to the values programmed into CV 25.
You must also change the value in CV 29 to tell the decoder to use the alternate speed table.
The Tsunami Technical Reference is here:
http://www.soundtraxx.com/documents/manuals/tsutechreference.pdf
It would be interesting to find out WHY SoundTraxx left CV 5 out of the Tsunami decoders.
Thanks, Cacole, This is all understood and I have been setting all the speedtable CVs via Decoder Pro. and including the user table settings (CV29 settings) and the presets.
I have been trying the various speed tables with success as far as all the speeds except the top speed. However, even if I take a preloaded speed table (or my own) and ratchet down the top speed and write it to the decoder (it is writing, I can see that in the normal loco motion), there is no change in the top speed.
I did reset the decoder to defaults and try again.
So I guess I will just use the loco at lower throttle settings. It would not normally move about much over 30 smph anyway. I was just trying to make it behave like my other 0-8-0.