I am using Digitrax DCS-100 to control my layout (And a Zephyr on my test bench). I will be installing NCE Switch-8 and Switch-it stationary decoders to control turnouts. I need to set particular CVs (548, 549) on the NCE Switch devices to configure them for ‘toggle’ mode switch input. I have searched and I cannot figure out how to program stationary decoder/accessory CVs using either the DT-400 throttle or the Zephyr. Help?
Thanks.
It’s on the last page of the Switch-It Mk2 manual.
Make sure all locos are off the track. Put the Switch-It in pgoram mode with output 1 selected, then use Ops Mde to ANY address to set 548 for toggle mode.
You need either JMRI or a DT402 throttle to program CVs over 255. This is a poor choice on NCE’s part to use CVs so high up with no alternate means of access.
–Randy
Randy, Thanks for the quick reply. I have a DT402 throttle that I haven’t used yet but I’ll hook it up and see if I can program CVs 548/549 on the Switch8 and SwitchIts. I have a Zephyr with dedicated test/programming track on my workbench that I will use perform this programming.
10 years later and I had the same question.
I was having trouble programming a new NCE Switch8/Button board for ‘toggle’ operation mode. I was trying to use an old DT400 throttle to program CV 548 and it would not allow me. My google search took me back to this post. 10 years later. 
I plugged in a DT402 throttle and I was able to get the Switch8 programmed for toggle operation mode.
Randy Rinker, rest in peace. There was no better forum member than Randy back in the day. Anything electronic or DCC-related would be quickly solved by Randy. He is greatly missed.
+1
Regards, Chris