Problem reading CV's

[PJ_model_trains]

I am experiencing problems reading CV's but not all loco's?

 

I have checked several and wrote to a loco also but am having problems with a Class 6P Patriot 4-6-0 45504 "Royal Signals"

 

I have checked contacts, added extra weight to the loco

 

when reading CV's but keep getting error... repeating.

 

Has anyone any suggestions please?

[Fishmanoz]

First make sure your programming track is spotless, then check for clean wheels and properly adjusted pickups. Given it is specific to a loco, logic says it must be a loco problem.

[Graskie]

I have one of those, PJ, will check it out and let you know what mine does. I do know that B*chmann loco CVs such as this couldn't be read at one time on my Elite. I used to get XXXX.

[Fishmanoz]

Early Bmann decoder not fully NMRA compatible possibly?

[PJ_model_trains]

Fishmanoz said:

Early Bmann decoder not fully NMRA compatible possibly?

This is a brand new loco. It has an 8 pin NMRA/NEM socket with decoder installed.

I guess it is it something to do with the chip in this loco as

it is not passing CV7

[PJ_model_trains]

I have restarted laptop. Opened Railmaster and it requested a different baud rate. I changed this to 115200 as requested and tried again.

 

Error again, different message. Check connections, done. Also says possible CV being read does not support

 

reading ??? It is brand new?

 

After error at CV 7 it now says unobtainable it then tried CV 1 and gave usual errors.

 

I tried Loco on live track but it will not run. I am assuming it is on 0003 but nothing happening. The reason I was checking CV

 

was to find loco DCC ID.

 

I will have to telephone eHattons tomorrow.

[PJ_model_trains]

I have switched on the point switch icon, then the loco in the box and it says in the switch icon 0003 so I assume the loco is set on 0003

[Fishmanoz]

You don't have to check the ID of a new loco, it will always be 03. That is why you change all of your existing loco IDs so as to leave 03 vacant for each new one as you add it.

 

Not running either? Again, a mechanical connection problem. It isn't

 

perhaps one that will not run unless tender attached, and you haven't attached it. Or tender is attached and causing a short from bent contacts? Try it without if won't run with, and vice versa. And check pickup contacts to wheels.

 

If nothing obvious,

 

return it to supplier.

[Graskie]

Tested mine, PJ. I can read CVs on Elite direct or from RM.

[Fishmanoz]

Sorry to bang on - it is a physical connection problem causing either an open circuit (most likely) or short circuit in the loco with/without the tender.

 

If you want to go further than I have suggested above and are comfortable with removing the

 

loco body before returning, check for broken wiring, decoder not fully seated or pushed in too far causing a short below, or even a blown decoder with black/burnt components in it.

 

[PJ_model_trains]

Fishmanoz said:

You don't have to check the ID of a new loco, it will always be 03. That is why you change all of your existing loco IDs so as to leave 03 vacant for each new one as you add it.

Not running either? Again, a mechanical

connection problem. It isn't perhaps one that will not run unless tender attached, and you haven't attached it. Or tender is attached and causing a short from bent contacts? Try it without if won't run with, and vice versa. And check pickup contacts to wheels.



If nothing obvious, return it to supplier.

Testing done on the straight not on bends.

Tender is attached all the time.

I will contact eHattons, supplier, when they open this morning.

[PJ_model_trains]

Graskie said:

Tested mine, PJ. I can read CVs on Elite direct or from RM.

Thanks Graskie, I saw some had problems with CV's with RM 1.54 but this seems to be fixed so didn't expect problems with this loco, being brand new also.

[PJ_model_trains]

Supplier says it sounds as though the loco is faulty and have asked me to return it.

 

So I won't be getting 'steamed up until after the new year'

 

Not to worry I have my Class 37 with sound and lights plus another seven locos and track building

 

to keep me quiet in between main holiday days and time with family.

 

Thanks everyone for your help this year.

[Fishmanoz]

PJ_model_trains said:

Testing done on the straight not on bends.

Tender is attached all the time.

I will contact eHattons, supplier, when they open this morning.

PJ, you misunderstood me here. I wasn't talking about

straights or curves but the electrical contacts under the tender post that take the current from the tender pickups through to the loco. These contacts can sometimes be bent causing shorts. You can prove if this is the case by removing the tender as I suggested.

If it works without tender, then bent contacts is your problem.

[Fishmanoz]

I don't believe that CVs was anything to do with your problem, other than a symptom of the real problem. I could try to put a loco on the track and completely miss putting the wheels on the rails. If I tried to read the CVs, it would fail, but CV reading

 

is clearly not the problem.

[PJ_model_trains]

Fishmanoz said:

PJ_model_trains said:

Testing done on the straight not on bends.

Tender is attached all the time.

I will contact eHattons, supplier, when they open this morning.
PJ, you misunderstood me here. I wasn't

talking about straights or curves but the electrical contacts under the tender post that take the current from the tender pickups through to the loco. These contacts can sometimes be bent causing shorts. You can prove if this is the case by removing the tender

as I suggested. If it works without tender, then bent contacts is your problem.

Thanks for explaining in more detail. I spoke with supplier and have returned the loco today.