ESU Loksound L V4.0 Uncontrollable on Track!

FurkaSOCal

FurkaSOCal

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Hello all,

I recently purchased a new locomotive and excitedly placed it on my programming track which is hooked up the ESU Lokprogrammer. I tested the initial functions with the default mapping which all appeared to work fine, and then made some minor changes to function mapping. Now the locomotive is uncontrollable or very erratic! To be specific often it will start driving but only at a very slow speed, or it will reach it's top speed step but then refuse to stop. Only turning the power off to the track saves it from driving forever. The decoder is a ESU Loksound L V4.0 (ESU 54399). Here is what I think happend: while I was programming I didn't realize I was dealing with a Loksound L, I thought I was dealing with an XL. So when I hit "write decoder data" in the Lokprogrammer, I uploaded a project file intended for the XL probably scrambling the poor L's brain. I have since tried overwriting everything with a project meant for the L, doing a decoder reset via CV 8=8, doing firmware update, and resetting decoder via lokprogrammer to no avail.

Does any one have any ideas?

Here is a link to illustrate what is going on:
 
idlemarvel

idlemarvel

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13 Jul 2015
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If you write a single CV and read it back again, has the value of that CV changed to the value you wrote? If that works you could try resetting the decoder one CV at a time using default values for that decoder. Check which decoder it is first using visual check and reading appropriate CVs. Start with the motor controls.
 
FurkaSOCal

FurkaSOCal

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If you write a single CV and read it back again, has the value of that CV changed to the value you wrote? If that works you could try resetting the decoder one CV at a time using default values for that decoder. Check which decoder it is first using visual check and reading appropriate CVs. Start with the motor controls.
That is a good idea, I have also been trying to force a firmware update which has worked for me in the past. However this time the firmware is already up to date so it doesn't seem to want to do a full factory reset.
 
Greg Elmassian

Greg Elmassian

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Try setting CV29 to allow analog, read it back to make sure it took, and then try on DC....

Also, a long shot, but change momentum to 0 on CVs 3 and 4...

Or come to our SDGRS meeting and meet a bunch of helpful people:


notice the address in the yellow box, all are welcome...

Greg
 
FurkaSOCal

FurkaSOCal

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Try setting CV29 to allow analog, read it back to make sure it took, and then try on DC....

Also, a long shot, but change momentum to 0 on CVs 3 and 4...

Or come to our SDGRS meeting and meet a bunch of helpful people:


notice the address in the yellow box, all are welcome...

Greg
Unfortunately i'm on duty today but I will keep an eye out for next months meeting! I often work on weekends.
 
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FurkaSOCal

FurkaSOCal

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I have a 10 amp NCE pro cab system, is it possible that it fried the decoder as generally the Loksound L is meant more for 0 scale?
 
Greg Elmassian

Greg Elmassian

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You need to give me a call, and we can talk, I'm in Carlsbad... email me and I will send you my phone number.. can answer your questions and get you going a lot faster.

Basically the system does not blow out your decoder, only shorts and overloads could hurt the decoder.

Greg@elmassian.com
 
Riekus

Riekus

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Sounds like something went awry in the back EMF settings. You mention that you have a lokprogrammer. Go to motor settings. Scroll down to preset motor types and choose the generic Buhler motor setting. Now things should be back to normal or at least much better.

Loading a XL file onto a L will have zero effect on its characteristics. It automatically rewrites it to a L version.

Also, make sure when you check your back EMF that under the slow speed setting, your regulation influence is at 100%. Otherwise very funny things happen.

Hope this helps
 
Greg Elmassian

Greg Elmassian

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We talked on the phone, and it might be that his attempts at reset did not take... so we discussed several techniques, since his NCE system can do register, paged, and direct modes.

A full reset will put the BEMF stuff back into reality, I believe.

Greg
 
Riekus

Riekus

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It wont reset that. Its volatile functions. If he had written CV's it will stay at the value he put in.

He mentioned he had a lokprogrammer. If he does not come right, try the Buehler settings. I never had a loco not performing on those settings.

If all else fails, reload the file.
 
FurkaSOCal

FurkaSOCal

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I have reloaded the fire several times with no results, I have been at work for the past few days but I will do some trouble shooting tomorrow and let you all know what works!
 
Greg Elmassian

Greg Elmassian

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Riekus: Can you explain further, "Its volatile functions"?

So the CV8 = 8 does not reset the CVs in the decoder? Or it just does not reset the BEMF CV's?

The esu loksound manual I am reading says that setting CV 8 = 8 resets Cs to factory default values.

I have found countless pages that say the same thing.


Greg