What do you mean by "There is no CV2 address?"
- 1) My decoder doesn't support CV2
or
- 2) I don't see CV2 is the CV list of my decoder
If 1), sorry I can't help you
If 2), not seeing the CV in the CV list doesn't mean it doesn't exist. You can manually add CVs in the CV list: add the CV number, provide a name, then read it; afterwards if needed, then change the associated value and write it back in the decoder. Your loco must be on the programming track.

Cheers
Fabrice

This is not a DCC decoder.
You cannot change this setting with an MS2.
You need a Central Station (60212 through 60215) or an ECoS to change this setting. Or a CU 6021. Or an Intellibox. Maybe an MS1 can do it, but I'm not sure.

Märklin locos come with perfect default settings and there is no need to change anything (sez Märklin Magazin).

BTW: there is no CV 6 with mfx decoders and only ECoS and Central Stations can change the speed curve.

Vmin is for minimum speed.
It´s start voltage i´m looking for.
I did changed Vmin from 18(standard) to 1.
No difference what i see to start locomotiv.

Okey
Thanks Tom!
But when i did changed value of Vmin,it was no difference in start voltage.
Seems mfx is crap...

Hi,
This is also my experience.
When using my CS1, most of the CVs show on the screen (advanced settings) for any locomotive, but only on some does it actually change anything.

I don't find that particularly annoying anyway, I just accept the limitations on some of the models that I have.

regards
Kimball

Hello Tom,
YXou are right, it is the 39644: http://medienpdb.maerkli.../1/pdf/39644_betrieb.pdf

CV2 should be changeable with CS2.

Another point:
On page 28 and page 34 You can see the decoder. It is a 14 Pin version, not a mtc21 decoder!

Can You verify this? Is there really a PluX or some other kind of proprietary decoder in this loco??? Plux 14 doesn't exist, so what is it?

PS: OK, it is mtc21, the picture in the manual is wrong. Here I found a picture from the 39644 interior: http://s14.directupload....ages/130818/roeji6do.jpg

That would have many disadvantages.

• A complete list of CVs would fill several pages => higher printing costs
  
• A complete list would allow CU 6021 owners to use 16 functions per loco => Märklin would sell fewer CS2
  
• It would make MS2 owners envious as they cannot use the CVs anyway
  
• Using undocumented CVs voids the warranty (sez Märklin) => the fewer CVs they document, the better for them
  
• All CVs can easily be changed with a CS2 => buy a CS2 to increase Märklin’s profit
  
• Undocumented CVs can be removed at any time => future models can come with more crippled decoders with more restrictions

Even with a complete CV list you cannot change the brightness of lights or alter the speed curve (this changes can be made with Central Station or ECoS).

BTW: The factory-installed decoders are crippled mSD without DCC.
You can use the CV list for MM that comes with the mSD (but not all CVs are supported by factory-installed decoders).
As mentioned a few times the list won't help with an MS2. But there are some useful CVs for 6021 users.

I give up...
No more mfx and Märklin trains!

Anders, I have stopped buying Märklin locos for this fact: mfx and I haven't tried to buy a loco with mfx and than sell the decoder and when it comes to sine motors I haven't tried them either with an ESU decoder.

John

Sorry, I'm old-fashioned. I sometimes make ironic remarks without using smilies.


Does your dealer have a Central Station 2? Maybe he can help setting up the loco to your taste.

It should be possible to slow the loco down using the load regulation parameter "reference voltage". But this is something an MS2 cannot change.

A Esu DCC decoder (LokPilot, LokSound) can be configured with a MS2 without any problems, just uncomfortable because You have to change each CV after the other.

The same for Märklin upgrade decoder (mLD / mSD), they can also be configured with the MS2 in DCC mode, without any limitations and with the same comfort like the Esu.

Only pure mfx decoders like the mfx standard decoders in Märklin mfx-locos or Esu mfx-only-Decoders (like LokSound 3/3.5) can be configured with the MS2 only for some standard MM CV values. But for example it isn't possible to change the function mapping, activating AUX ports and so on.

Therefore, the best choice is to have locos either with Märklin mLD / mSD upgrade decoder or any other DCC compatible upgrade decoder from other companies like Esui, Zimo, Tams, Lenz, ...

Standard-mfx from Märklin and pure-mfx-Decoders from Esu are not a good choice, If You need to change some enhanced functions.

Moritz

I don't know why. Probably, Märklin hopes people will buy a CS2.

But I think, it would be better to sell Locos with full mfx/DCC like mLD/mSD. But I'm not Märklin.

AFAIK there is no such thing as a pure ESU mfx decoder (at least not in retail). The ESU LokPilot 4.0 M4 is a full blown decoder with the same possibilities as the standard LokPilot. The M4 supports DCC, DCC Railcom+, MM and mfx (M4). It comes in a variety of plugs (Plux22, MTC21, NEM 8-pin etc.). To my knowledge the only thing that seperates it from the standard LokPilot is the way it handles vMin and vMax. The M4 (or any mfx decoder for that matter) calculates a speed curve relative to vMin and vMax. This is also why you cannot disable the speed curve on the M4.

You can tune the M4 by progamming its CVs using DCC the way you would any LokPilot.

When it comes to motor control the LokPilot 4.0 family has a very cool auto-tuning feature:

1. Put the locomotive on a straight piece of track. The track must be long enough for the loco to be able to run at full speed for two seconds.
2. Make sure that function 1 is not active and the speed is 0.
3. Using PoM (CS2 or MS2) enter the value 0 into CV54.
4. Now activate function 1. The locomotive will run at full speed for two seconds. When it's done, it will have near perfect motor control settings.
5. You can do some final adjustments, but for the majority of locomotives the auto-detected settings will be good enough.

WARNING: You will not be able to control the locomotive during the process, so make sure that it cannot run off the track!

It´s waste of time for me to focus on Märklins mfx decoder,so i decides to fix the problem.
I thank you to all of you who did answered topics here.