Programming Issues/differences Between Lgb 55020

[andyspencer]

Hi all,

Looking to pick your brains on these rather dated decoders...

Are there any functional and programming differences between a Lenz and a Massoth version of the 55020?
I've seen some mention of only certain cv's being adjustable on the earlier Lenz version but can't get any definitive answers.

I have a loco which is fitted with said Lenz versions which I'm struggling to program. I seem to be able to change the loco address, but not a lot else. I've tried using the ESU lokprog and an LGB 55015p. I'd tried several methods such as directly to the cv number, using cv6 and 5 and setting the 55015 to both C and P programming modes. The model seems to take the change with a tiny tiny judder, but when I test the model, the programmed function hasn't changed.
I'm at a loss of what I'm doing wrong...

 

[idlemarvel]

This recent thread had a long discussion about this:
https://www.gscalecentral.net/threads/lgb-marklin-new-stock-with-marklin-decoder-problems.301011/
I'm not sure it came to any great conclusion but there may be some hints in there.
I have an old LGB tram with a 55021 decoder which I could "program" with a Lenz command station using their CV config software. Not sure this is much help :-(

 

[idlemarvel]

I should add that I did not have to use the cv5 / cv6 method for changing higher numbered CVs

 

[andyspencer]

Nothing jumped out after reading that. Will have another play with settings over the weekend I think...

 

[muns]

Older 55020's would only allow "direct" programming of CVs 1 - 6 I believe and you had to use "register" programming for the others, i.e. using CV5 & 6 to set the CV to program and required value to set it to (can never remember which CV is which for this method though).