Which is it, the function numbers are off, or the CV values don't match?
There should be a page in the instructions that came with it listing the DCC functions. The only MTH loco I have, this matches up just fine with Digitrax, ie if the MTH instructions say F15 is a station call, when I hit F15, I get a station call. Are you operating the functions correctly as described in the Zephyr Xtra manual, so that you really are getting F15 and not F5?
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
I have an MTH 2-8-8-8-2 Triplex. I use a Digitrax DCS51 Zephyr Extra controller. Many of the functions of the MTH loco either don't work at all or function on different numbers. Is there any way to make the MTH CVs compatible with my Digitrax controller, if so how? Thank you