Engine shed 1 Posted February 12 Share Posted February 12 Hi hope some one can help I am trying to change the loco number on my Hornby tts sound Decoder in a tornado that is set at 03 I have a nce power cab I have even reset the decoder using the code cv8 hope someone can advise thanks in advance Link to comment Share on other sites More sharing options...
96RAF Posted February 12 Share Posted February 12 Consult your controller manual for the key strokes to simply send a new address to the decoder. I believe you need an add-on unit to be able to read and write values to CVs. The controller will sort out where to lodge the values for a short or long address and adjust CV29 to match. Link to comment Share on other sites More sharing options...
Rog RJ Posted February 12 Share Posted February 12 The powercab does not need any add ons to read and write CVs.There is an auto switch unit that can be added to avoid having to manually switch from the main track to the programming track but it is optional. It's like the Select. In fact I think the auto switch unit can be used with the Select.It's easy to change addresses with the Powercab, just read the manual. Sorry, can't access mine ATM.Edit for typo Link to comment Share on other sites More sharing options...
Engine shed 1 Posted February 12 Author Share Posted February 12 Thanks for your replys I am doing what it says to do acording to the comic lol 😂 but it just stays at 03 ie what the decoder it factory set at this is the only loco that doesn't want to have the address changed Link to comment Share on other sites More sharing options...
Rog RJ Posted February 12 Share Posted February 12 There is an oddity with the Powercab. It treats address 3 and 03 as different addresses so try the different variations when programming. Link to comment Share on other sites More sharing options...
Engine shed 1 Posted February 12 Author Share Posted February 12 OK I will try that tomorrow thanks for everyones help. Link to comment Share on other sites More sharing options...
ntpntpntp Posted February 12 Share Posted February 12 PowerCab will treat 03 as long address 3 which is not the same as short address 3 (the default for new decoders).I take it you're in "Use Program Track" mode (not programming on the main)? Remembering that if your PowerCab doesn't have an AutoSwitch module added it uses its main track output for programming (hence the need to remove all other locos from the track first). Does the PoweCab manage to read the decoder ok?Once you're into the programming mode it's just a case of following the steps it guides you through to enter the address and choose whether to activate the long or short address. Link to comment Share on other sites More sharing options...
Engine shed 1 Posted February 13 Author Share Posted February 13 It rec it on as 3 but won't allow me to change it the loco moves vac forwards sound all work but just won't change the number that I tell it to be I'm using it on the prog track mode as well it's almost as it the decoder is lock to 3 Link to comment Share on other sites More sharing options...
Engine shed 1 Posted February 16 Author Share Posted February 16 Just an update whilst the forum was having its update I managed to sort out the loco and changed the CV loco number many thanks to all to all helped 1 Link to comment Share on other sites More sharing options...
ntpntpntp Posted February 16 Share Posted February 16 @Engine shed 1 What was the cause and the solution (for the benefit of people coming across this issue in the future)? Link to comment Share on other sites More sharing options...
Engine shed 1 Posted February 16 Author Share Posted February 16 I was trying to do it using the setting on my power cab maintrack and not the prog track this was the only loco that I have had to use prog track op on but I think I will always change them using this opt from now on I guess it was operater error 😂learnt the hard way but def learnt Link to comment Share on other sites More sharing options...
ntpntpntp Posted February 16 Share Posted February 16 Well done. I've always understood that the address is something you cannot change thru Programming On The Main because the system is talking to the decoder via its address, so you have to use the Programming Track mode which doesn't care about the address and will program anything/everything sitting on the track. That may of course be something that was only true with older decoders, but I still stick to it as a principle and use the Programming Track for everything. Also, you can only read back CVs using the Programming Track so you cannot confirm the changes have stuck. PoM is more for making slight tweaks and for setting up consists etc. I use the free JMRI software for programming (with a SPROG for hardware but JMRI can talk to NCE systems with an appropriate interface), it is more user-friendly and can save all the CV settings as a Roster Entry in case they're lost, you're replacing the decoder with another of the same type, or you made a mess of some changes and need to restore everything 🙂 Link to comment Share on other sites More sharing options...
96RAF Posted February 16 Share Posted February 16 You can cheat the system by having PoM talk to a decoder short address then program it a long address, and vice-versa - with some controllers. Link to comment Share on other sites More sharing options...
Engine shed 1 Posted February 17 Author Share Posted February 17 Thanks once again for everyones help oh the world of dcc is a minefield and such a learning cerve. Link to comment Share on other sites More sharing options...
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