LGB Loco confused by DCC programming attempt

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LGB Loco confused by DCC programming attempt - It runs in DC but not DCC despite having an mfx/DCC decoder

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Miamistax		#1 Posted : 29 May 2025 01:10:46(UTC) Retweet
Joined: 29/05/2025(UTC) Posts: 2 Location: Florida, Miami		I just bought a new LGB 20494 P42 Diesel Locomotive which has mfx/DCC pre-installed. Since i have several locomotives, the first thing I did was put it on my DCC programming track to change its address from 3 to 108. The loco flashed its headlights during the write and flashed again during the read where my controller's display indicated the change had taken effect. Except when I put it on the main track, it completely ignores the DCC throttle and all function buttons. And it runs perfectly in DC. I tried programming it with an address of 9 to try a low number and also with 3 to try to put it back the way it was in the box. Nothing worked. Am I supposed to press some particular function button to "wake it up"? Is there some special trick to programming it with a DCC controller? Or do I need to find an mfx controller to program it?

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marklinist5999		#2 Posted : 29 May 2025 10:25:28(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,912 Location: Michigan, Troy		Yes, it needs to be reset.


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rhfil		#3 Posted : 29 May 2025 16:30:02(UTC) Retweet
Joined: 05/09/2014(UTC) Posts: 678 Location: NEW HAMPSHIRE, Somersworth		What are you using for a controller?

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Miamistax		#4 Posted : 30 May 2025 02:01:25(UTC) Retweet
Joined: 29/05/2025(UTC) Posts: 2 Location: Florida, Miami		rhfil Thanks. CV8 = 8 doesn't seem to work. Does it want a different CV setting to reset it? marklinist5999 I'm using the ESU CabControl to run the trains outside, but I generally do the programming with a Digitrax DCS 52 because it has a nice screen that handles CV 1, 17, 18 and 29 all at the same time. I read somewhere after trying to program a new address that the trick with mfs/dcc is to run the loco with DCC first with the default settings and then mess with the CVs.

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marklinist5999		#5 Posted : 30 May 2025 12:53:44(UTC) Retweet
Joined: 10/02/2021(UTC) Posts: 3,912 Location: Michigan, Troy		Ok, I'm not familiar with using ESU controllers. There can be difficulty when trying to adjust CVs on mfx decoders. Marklin owns LGB and perhaps a CS 3 could disable mfx and set it up for dcc only. Digitrax as far as I know is not compatible with mfx decoders. They may use railcom or another digital encoding. Mfx doesn't. You may be able to run the loco., but you won't be able to get every function.


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