Marcoblanco Posted September 10, 2020 Share Posted September 10, 2020 I have some odd behaviour from my Hornby accessory decoders, controlling pl11 point motors. Only two outlets are working correctly. I have tried reset, cv8 to 8. But comes up error on the dynamis. Having tried everything (and they worked fine on my previous layout a couple of moths back.) Do these decoders fail? I've not experienced any of this before and have used dcc for many years. Link to post Share on other sites More sharing options...
smokebox Posted September 10, 2020 Share Posted September 10, 2020 Like anything else, they can fail. Sometimes they will fail almost immediately, sometimes after many years of service. Link to post Share on other sites More sharing options...
RAF96 Posted September 13, 2020 Share Posted September 13, 2020 Try the reset a few times. Decoders can often be hard of hearing I find and one has to repeat the instructions. Also give the Dynamis time to do its thing step by step. Some controllers say on screen they are done but are actually still doing stuff. You may also like to try programming in Reg mode, but there is a very limited range of registers to play with. A known fault with R8247s is they can suffer from a controller induced flutter in that the unit gets into a state whereby it works as normal until port 1 is selected whereupon it enters a flutter mode that continually depletes the capacitors. Thereafter none of the ports work until reset. Leaving the unit powered up in this unstable state can cause permanent damage. Link to post Share on other sites More sharing options...
Marcoblanco Posted September 17, 2020 Author Share Posted September 17, 2020 thanks for the input RAF , im sure the info will benefit others and me. it seems the fault may have been caused by my programming track rail just slightly touching the main track which is on the drop down section so hasnt got isolating joiners. [arggghhhhh] Latterly ive connected another spare decoder to get my points working . so my faith in the R8247s is restored! Link to post Share on other sites More sharing options...
RAF96 Posted September 18, 2020 Share Posted September 18, 2020 You are fortunate that inadvertently cross connecting the Prog to Main didn’t blow the programming side of your controller. I did that to an Elite many years ago by connecting the Boost (which shares the Prog circuitry) to the Main (didn’t read the imstructions or understand the implications way back then). We live and learn. Link to post Share on other sites More sharing options...
JST Posted September 18, 2020 Share Posted September 18, 2020 Interesting, I didn’t know you could reset a Hornby accessory decoder. Must be a RTFM fail. I have one that has gone down to 2 ports and is generally being a pain so will give resetting a try. Link to post Share on other sites More sharing options...
RAF96 Posted September 21, 2020 Share Posted September 21, 2020 (edited) Their accessory decoders reset just like loco decoders. Edited September 21, 2020 by RAF96 Link to post Share on other sites More sharing options...
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