JWRStation Posted August 25 Share Posted August 25 I have bought a loco with a Digitrax DH121 decoder fitted and whilst it works on DC including the directional lighting, I cannot read the decoder with Railmaster??? Checked and Railmaster reads my other Loco's OK so I am assuming there is a compatibility issue?? Can anyone confirm this?? Regards Joe Link to comment Share on other sites More sharing options...
96RAF Posted August 25 Share Posted August 25 Use the pull down in CV 7 (may be CV 8 - can't remember and don't have the manual handy) to see if the decoder is listed in the database. Link to comment Share on other sites More sharing options...
JWRStation Posted August 25 Author Share Posted August 25 Done that and there is the 123 decoder which was the replacement and a 'generic' digitrax number. Tried selecting that and still no reading. HOWEVER, found out the 121 was discontinued in 2002 and also it was a pre CV8 reset unit which required CV to be manually addressed for everything. It is supposed to be NMRA standard but I suspect maybe just too old for Railmaster to deal with??. No probs if so as the loco price was good even without a decoder anyway.. 1 Link to comment Share on other sites More sharing options...
ntpntpntp Posted August 25 Share Posted August 25 Could be the old decoder uses paged reading/writing rather than the direct mode which modern decoders use. Digitrax certainly used to specify their decoders default to Paged mode. Perhaps Railmaster doesn't use Paged mode (or perhaps it has a setting somewhere to use that mode)? Something like JMRI DecoderPro software would be able to handle it, but of course you need a suitable PC <> DCC system interface. I use a SPROG DCC Programmer box. Link to comment Share on other sites More sharing options...
96RAF Posted August 25 Share Posted August 25 Which controller are you using with RM. If the Elite then try using direct programming - i.e. not from within R~m. Elite also supports all programming modes including Paged. If using eLink then you are stuck with what RM offers. Link to comment Share on other sites More sharing options...
JWRStation Posted August 26 Author Share Posted August 26 I have tried JMRI decoder pro but have the elink so looks like its a no go. Solution junk the Digitrax and fit one of my many spare decoders... Thanks and regards for the replies Link to comment Share on other sites More sharing options...
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