I believe QSI uses a default of 6 for CV29. If you change the value of CV29 to 7 in one of the engines, that will cause that unit to run in the opposite direction from the un-altered one. When you change the value of CV29, any modifications of other CV’s will be reset to factory defaults, therefore the engine number reverts to 3 again. You’ll have to reprogram the engine number to the long address once more. The other way is to create a consist, with one forward and one-backward. Then whichever diesel number (long address) you select of the two, that will be the lead unit for forward direction, lights and sounds (horn, bell, etc.) Digitrax has a CV29 calculator on their website that you can select options, then it gives you the corresponding valve you need to use for CV29, if you choose to go with that option.
