QUOTE (markw @ 21 Mar 2008, 08:38)
<{POST_SNAPBACK}>A question for some of you techies
today i was setting up a new loco with my ecos. on the programming track i set the address to 3110 then moved the loco to the main and tried to run it but had no response, lights not working, basically nothing
i checked out the values of cv1, cv17 and cv18 which read back as 38, 192 and 100 respectively so selecting the address 38 i could then control the loco. using the calculator on this forum it shows 17 and 18 should be 204 and 38.
questions
what should the value of cv1 be.
why are 17 and 18 values different to the calculator
how do you calculate what the values of all 3 cv's should be for any 4 digit address.
i know about setting cv29 bit 5 so i don't think there was an issue with that. and i have succesfully setup most of my other locos with 4 digit adressing with no problem but most of those have either loksound or lenz decoders. This loco and another i tried have bachmann ez 2 function decoders (36-552 i think) cos thats all i had to hand.
Anybody out there care to help me try and understand this issue ?
Cheers
Mark
***Hello Mark
Its confusing isn't it - thankfully all modern controllers take away the need to play with CV's 17 and 18 other than for curiosities sake. I have to confes I haven't done it manually for many years.
Basically you shouldn't need to even have to worry about this with ECOS or any current controller. however reading the above it looks to me like you have ended up with wrong settings in CV29, 17 and 18 (if you had truly programmed it to respond to long address, it shouldn't have responded to short address 38!)
I do sense some confusion as to where the "38" should have been - did you perhaps put it in CV1 instead of CV29 or CV18?
For the loco to respond to #3110, the settings should be as follows. (ONLY CV29, 17, 18 are relevant to long address...The setting in CV1 has no bearing on the long address setting - CV1 is simply the short address)
CV29 = 38 (making bit 5 high by adding decimal 32 to setting when short address is used tells decoder to respond to the long address)
CV17 = 204
CV18 = 38
The process for calculation is a pain - the following calculator will be useful - found at the top of the Moidel Rail Forum DCC section:
http://www.modelrailforum.com/forums/index...ress-calculator
Regards
Richard
DCCconcepts
PS: Neil - I am very surprised you have programming issues with ECOS - My experience with ECOS owners is that they often forget to carry out one step in the programming sequence, but if all boxes checked/actions carried out, it never fails as long as the wheels and programming track are clean.
REJ