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37171 DampfLok with Loksound 2 v.1 chip running crazy recently - runs at full throttle and switches directions
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Offline White Buffalo  
#1 Posted : 30 January 2018 19:40:47(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
Hello all,

I have a Märklin 37171 Dampflok with a Loksound2 V.1 chip that started acting very erratic & strange this past weekend. It will spontaneously just take off at a speed that is much higher than the max speed when using the Uhlenbrock controller. This locomotive is running like a sewing machine on steroids, I have to keep a very close eye when using it because it will all of a sudden take off at full throttle "Casey Jones" speed and switch directions (forward & reverse) as well. I have to be quick to catch it so it doesn't jump off the track and get damaged. It's on the shelf for now, until I have time this weekend to open her up for inspection.

Has anyone had something similar like this happen?

I am not sure if it is a decoder problem or the Uhlenbrock control unit. I do not think it is the Uhlenbrock unit since the other digital Locomotives are running just fine.

The decoder was installed back in 2002, it has maybe 5 or 10 hours of operating time.
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Offline White Buffalo  
#2 Posted : 31 January 2018 20:11:37(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
It did not do it at all last night and I ran it for about 20 minutes. I just don't want it to race off the track if I turn my back for a second or two.
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Offline Dave Banks  
#3 Posted : 31 January 2018 21:58:15(UTC)
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Dave Banks

Australia   
Joined: 08/03/2006(UTC)
Posts: 1,047
Location: Gold Coast, Australia.
I have this phenomenon on my layout as well. It happens with one of my Roco locos with address #3. I use an Ecos 50200 controller & I have this happen when I activate a certain point with address #3. I think the fact that they have a shared address or I have possibly a shared ground connection maybe of some note but I must say this is a random act & hard to find but yes loco takes of at a rate of knots backwards or forwards & I have to hit the stop button fast or we have a catastrophe in the making. I don't believe there is anything wrong with your loco but there would be no harm in reloading the whole profile again just in case there is a software glitch if you can. I hope someone on this forum has a solution for me as well. So your not alone with this issue.
D.A.Banks
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thanks 1 user liked this useful post by Dave Banks
Offline White Buffalo  
#4 Posted : 01 February 2018 13:25:55(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
Thanks for the advice Dave. I have never reset or done anything with the decoder except change the sound volume using CV's. I am definitely interested in learning how to do this though. I just need to put some time into researching the tools & procedures to do this. Playing with individual CV's through the controller can be tedious. I would like to learn how to do it with the better software & tools that are out there.

The locomotive did not do it at all, last night. But like you mentioned - you need to be quick to reacted to prevent a catastropheMad
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Offline blid  
#5 Posted : 01 February 2018 14:57:05(UTC)
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blid

Sweden   
Joined: 02/01/2012(UTC)
Posts: 244
Location: Stockholm, Sweden
I have the 2003 Version R6 LokSound 2 booklet. On page 22 the CV 29 is described. Setting bit 2 to zero might help. It seems like the decoder change to analog mode for some reason. This will prevent running in analog mode.
OneGauge Marklin and MTH, ESU ECoS 2.1 on LGB tracks. MTH 3-rail 0-gauge, DCS on GarGraves tracks. Z: Rokuhan tracks, analog or DCC+TC Gold.
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Offline White Buffalo  
#6 Posted : 01 February 2018 15:04:17(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
ausgezeichnet! BigGrin .

Thank you, I will try this out tonight when I return home. This forum is such a great place.BigGrin


tack så mycket ( is this correct?BigGrin ).

vänliga hälsningar,

Rich
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Offline blid  
#7 Posted : 01 February 2018 15:11:43(UTC)
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blid

Sweden   
Joined: 02/01/2012(UTC)
Posts: 244
Location: Stockholm, Sweden
A German, English and Swedish mix! All correct as far as I can see.
OneGauge Marklin and MTH, ESU ECoS 2.1 on LGB tracks. MTH 3-rail 0-gauge, DCS on GarGraves tracks. Z: Rokuhan tracks, analog or DCC+TC Gold.
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Offline Goofy  
#8 Posted : 01 February 2018 17:55:49(UTC)
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Goofy


Joined: 12/08/2006(UTC)
Posts: 9,290
When i use my trains and drive with the DCC protocol i make sure first by disable others protocol and analog drive in the adress CV 29 and CV 47.
This is for the version 4.
Yours lok sound are older version so i´m not sure if it only support DCC protocol?
H0
DCC = Digital Command Control
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Offline jvuye  
#9 Posted : 01 February 2018 18:30:21(UTC)
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jvuye

Belgium   
Joined: 01/03/2008(UTC)
Posts: 2,883
Location: South Western France
Originally Posted by: blid Go to Quoted Post
I have the 2003 Version R6 LokSound 2 booklet. On page 22 the CV 29 is described. Setting bit 2 to zero might help. It seems like the decoder change to analog mode for some reason. This will prevent running in analog mode.

Yes, I'm quite sure this will solve the problem. I had siùmilar problems with early Lokounds.

Jacques Vuye aka Dr.Eisenbahn
Once a vandal, learned to be better and had great success!
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Offline White Buffalo  
#10 Posted : 01 February 2018 20:52:22(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
Originally Posted by: Goofy Go to Quoted Post
When i use my trains and drive with the DCC protocol i make sure first by disable others protocol and analog drive in the adress CV 29 and CV 47.
This is for the version 4.
Yours lok sound are older version so i´m not sure if it only support DCC protocol?


Thank you goofy, and yes it only supports the Märklin Motorola and the DCC Protocols. On this Loksound 2 decoder CV 29 is The configuration register. 2 was set on bit 2, so I changed that to 0 to switch off analog operation.

CV 47 in this manual is Function Assignment F9(r), Which is a function outputs activated by key F9 when driving backwards. What is your CV47?
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Offline Goofy  
#11 Posted : 01 February 2018 21:44:23(UTC)
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Goofy


Joined: 12/08/2006(UTC)
Posts: 9,290
Originally Posted by: White Buffalo Go to Quoted Post

CV 47 in this manual is Function Assignment F9(r), Which is a function outputs activated by key F9 when driving backwards. What is your CV47?


CV 47 are protocol selection.

H0
DCC = Digital Command Control
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Offline White Buffalo  
#12 Posted : 01 February 2018 21:52:02(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
Thank you, I will look at my CV chart to see if there is a selection for that. But I did set the Uhlenbrock control unit to only transmit the Motorola New format for the addresses of this locomotive.
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Offline blid  
#13 Posted : 02 February 2018 14:19:00(UTC)
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blid

Sweden   
Joined: 02/01/2012(UTC)
Posts: 244
Location: Stockholm, Sweden
I have replaced this decoder long ago and can't verify this.

As far as I understand this decoder has the DCC address in CV1 and the MM2 address in CV64 and no way of disabling either of them. In other words: it is always listening to commands for both addresses. If you are sending DCC commands to another decoder with the same DCC address, this decoder will also respond. The decoder don't know how you have set your controller.
OneGauge Marklin and MTH, ESU ECoS 2.1 on LGB tracks. MTH 3-rail 0-gauge, DCS on GarGraves tracks. Z: Rokuhan tracks, analog or DCC+TC Gold.
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Offline White Buffalo  
#14 Posted : 02 February 2018 15:34:12(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
Danke Blid, your suggestion above seemed to work. My daughter and I ran it for about an hour without any problems.

besten Dank - Rich
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thanks 2 users liked this useful post by White Buffalo
Offline White Buffalo  
#15 Posted : 04 February 2018 00:54:03(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
So far so good, no problems yet
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Offline White Buffalo  
#16 Posted : 13 February 2018 23:46:42(UTC)
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White Buffalo

United States   
Joined: 29/12/2016(UTC)
Posts: 509
Location: South Dakota
it's been about 2 weeks and she hasn't repeated that behavior. Thank you all again for guiding me in the right direction.BigGrin
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