Thought i had the getting locos to run on my digital ovalfigured out. the term domain on ms2 controller refers to address that the dip switch setting is set for according to loco manual, yes? so, i set the eight dip switches to say 4,6,8 on, which is 41 in manual. i put loco on track and prepare to enter manually, i use menu to domain number 41 and say yes, give it a name and picture, it should run? when i hit stop it runs full speed backwards. the manual has the number 41 highlighted next to switches 4,6,8 on. the loco number is 37310. i go to controller to set up loco from database, 37310, hit yes and give a name and say yes. loco still runs fast backwards when stop button is pressed and stops when stop pressed. what am i missing here? i downloaded a tutorial from this forum but this is a new computer and all those cool files are lost. any insight/help is greatly appreciated!!!!!!!!!!!!!!!
p.s. this loco used to run when i first had digital track setup but after massive layout upgrade finally have digital oval back, i just do not remember how?:)

What does CV stand for? I have a Marklin locomotive that has a no switch decoder that runs in analog but does nothing on digital. Can the MS2 turn off analog and set it up to run in digital? How is this accomplished if yes?

There's a bit of confusion here.

The 37310 is a Br184 with a 6090x decoder, This is fitted with DIP switches as mentioned in Thomas's original post. You cannot set CVs on these decoders.

The 37312 is the same loco with a mfx decoder which will auto-register with the MS2. mfx decoders can have some CVs changed using the menu on the MS2

The link that Minok has posted is for the 37307 loco, not the 37310 or 37312!

Thomas, these older decoders sometimes fail for no apparent reason. You can try the loco on analogue control to see if it runs in both directions correctly. I suspect you have a short circuit on an output transistor on the decoder and this is is supplying the full voltage to one of the motor feeds. I had a similar decoder fail on a 3780 Br221, except that in that case one transistor failed open-circuit, and the loco would only run in one direction.