Elesewhere on this site I talked about the Hornby decoder that keepped being reset to use address (0). Following are more thoughts on the subject.
To start let me show you a couple of rules that have been valid from the beginning of electric powered model railways. Firstly is is a dusty, dirty environment. So regular maintance is needed. Keep the track clean. Keep the wheels clean. Keep the pickups clean. In the 60s the locos came with their own electrical filters. Now we still need filters. They can be purchased from various places or make your own. DCC works better with filtering. Sparks or arcing can generate interference which plays havoc with the chips. Both loco decoders and accessory decoders.
In an earlier post I spoke of trouble I have had with an accessory decoder. Well this is being revisited. The trouble was found to be a programming one that was caused by either programming a loco on the main line or electrical interference. The Hornby forum has some entries about this very subject.
How to fix this. First you must reset the chip. It doesn’t mater if it is a loco or an accessory decoder the reset is the same. What is needed is to return the chip to its original factory setting because it has been corrupted. Set the Elite to “Clasic” mode. Write to VC 8 using data value of 8. We are talking Hornby here. All Hornby chips will reset using this process. Some manufactures use a different process for resetting their chips. Check the information on how to reset your chip with the chip manufacturer.
Once the chip is reset you need to reprogram it. You can use the Elite or RailMaster to reprogram the chip. This must be done on the programming track with no other chip present. Set a loco to its previous value in your fleet or set the accessory decoder to the desired group. That is:- if is the third accessories decoder then that would be set to (9).
With the accessory decoder still connected to the programming track read VC 513. It should have a value of 3 in it because this is the third group. If this location remains at 000 then the decoder is not properly programmed. Try to program it again and check the results. Once this is done the decoder will work properly. With out the correct number at VC 513 you will have a recurring problem of the decoder being reprogrammed to a negative value.
It is hoped that this shed some light on an otherwise dark subject. Understanding digital communication is difficult for most people especially if all they want to do is run trains. Programs like RailMaster make live much easier. It is worth spending time to read the instructions that come with RailMaster. This will save you a lot of headaches.
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