Speed Steps : PwrCab Vs Loksound - Diagnostic

Dear CSX,

K, there are a few Decoder-based settings that sound like they would be "Go to" relevant,
but your reference to "ALL locos affected" and "Think it's PowerCab based" throw a couple of wrinkles into the diagnostic mix.

Reccomend checking the following:

On the Decoders :
(Pick ONE Loco as the "Test Example" to start with,
we'll focus on that unless/until the diagnostics lead us elsewhere) 

- Read Current CV2/6/5 (MIN / MID / MAX speed values)
- Read Current CV29 (Config CV, includes "select 14 or 28/128 Speed Step mode" setting)
- Read Current CV49 (Extended Confiig #1, includes "auto-detect Host DCC system Speed Step Mode" setting)
- Read Current CV114 (Sound Config CV, inc "Speed-steps per audible notch change" value)

On the PowerCab :
- Do you use "F12" for any Function?
If YES, you MAY have inadverently toggled the loco/consist into "128 speed step mode", instead of the more-common "28 speed step mode". This change would explain the "jump in speed-step/audible-notch" behaviour. See PowerCab page 20
https://ncedcc.zendesk.com/hc/en-us/article_attachments/200498789/Power_Cab_V_1.65_Manual.pdf 
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To diagnose if the Powercab is indeed set to "the wrong speed step mode",
- select any loco address that does NOT match an actual loco on your layout,
(IE to avoid an accident!)
- turn the Throttle/Speed Step UP as far as it will go,
- and Observe the Speed Step Count on the throttle. 

If the count continues above 28, and onward to 128, then this is likely a part of the "fault condition" equation...

Interested to hear the results of the above checks...

Happy Modelling,
Aim to Improve,
Prof Klyzlr

Speed Step Changed

I have a NCE PowerCab and I program all my models so that speed step 10 on 28 speed steps gives me 10 scale miles per hour. All my LokSound equipped models with throttle up roughly every 3 speed steps in 28 speed step mode - but if I change the throttle to 128 speed steps then they will only notch up every 9 or 10 speed steps (and of course run way too slow with my CV 2/6/5 settings).

So I'd go with what the Prof says and make sure you have the throttle on 28 speed steps and no 128.

Thanks!

Thank you Prof,

I had a hunch that F12 was the cause of the problem. Pressed it once and everything works as intended again! Thanks again