Wobblinwheel Posted April 20, 2015 Share Posted April 20, 2015 A year or so ago, I bought my Hornby Railroad "DCC Fitted" Mallard. I almost immediately replaced the installed decoder. Now I want to temporarily use this "basic" decoder in my new "Caerphilly Castle" loco. Where might I find a complete technical manual on this decoder, listing lighting fuctions/wiring, "F" functions, and supported/unsupported CV's? If I remember correctly, this decoder didn't work very well, but then I didn't try to "fine tune" anything either. Is it worth using? Link to comment Share on other sites More sharing options...
Cronan Posted April 20, 2015 Share Posted April 20, 2015 HiScroll to the bottom of this web page then click support under customer care then manuals then click on the hornby digital manuals then scroll down the the last pdf file is the decoder one.I would of thought it would be with your Mallard model anyway here's a link if it works.https://www.hornby.com/uk-en/downloads/view/index/cat/3/ Link to comment Share on other sites More sharing options...
Wobblinwheel Posted April 20, 2015 Author Share Posted April 20, 2015 I have just looked at that, but I'm still a bit confused about CV29. I think I usually set CV29 to a value of 2. I want normal loco direction, and analog operation disabled, 128 speed steps. Is "2" the proper value for this decoder? (single-digit address) Link to comment Share on other sites More sharing options...
poliss Posted April 20, 2015 Share Posted April 20, 2015 Yes, you would be correct.Are the references to 'bits' causing the confusion? Link to comment Share on other sites More sharing options...
Wobblinwheel Posted April 21, 2015 Author Share Posted April 21, 2015 Possibly? I'm so used to TCS (keep alive) decoders lately, where on CV29, they have a list of functions, and a value for each. You decide the ones you want, add 'em up, and enter the total value. The destructions for the Hornby decoder threw me off a bit. I figured being NMRA compliant, it would probably be the same. And yes, the "bits" thing still confuses me sometimes. I've read it, [thought I] understood it, then next thing you know, I forgot it. Using so many different decoders (many with sound), and the different ways the manuals are presented, I get quite confused sometimes. I've got two locos with "record and play" functions, that I haven't been able to figure out at all. I "record a sequence", and when I "play it back"......ain't no tellin' what's gonna happen! Sometimes I gotta GET OUT OF THE WAY!! Link to comment Share on other sites More sharing options...
poliss Posted April 21, 2015 Share Posted April 21, 2015 Bits 0 to 5 always have the same functions on CV29. Bits 6 and 7 are different. Bit 6 is reserved for future use and Bit 7 seems to be something to do with accessory decoders.See the NMRA CV Standards S-9.2.2 for full details.http://www.nmra.org/sites/default/files/s-9.2.2_2012_10.pdf I use this simple tick box CV29 calculator to work out the values.http://www.2mm.org.uk/articles/cv29%20calculator.htm Link to comment Share on other sites More sharing options...
Wobblinwheel Posted April 21, 2015 Author Share Posted April 21, 2015 Very informative stuff, written in a way even I can understand! I'm starting to think the "record and play" function on my two locos require "14 speed step" while being recorded. Something about 14-steps using less memory. So, if I set CV29 to "0", will that change me to "14-steps"? How would you set "28-steps", instead of 128? I'm experimenting here... Link to comment Share on other sites More sharing options...
poliss Posted April 21, 2015 Share Posted April 21, 2015 14, 28 and 128 Speed Steps.https://sites.google.com/site/markgurries/home/technical-discussions/decoder-motor-drive/14-28-and-128-speed-steps Link to comment Share on other sites More sharing options...
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