I came across a really nice 28462 Sersa (Am 847) set on eBay. After it arrived it was apparent that this was a collector's item and the motor was brand new. So, I decided to upgrade the DCM motor to 5 pole (complete with the Marklin permanent magnet) and install a Loksound 5 decoder. I used this ESU project to set up the decoder ->



I made two changes from the default project. Turned off the DCC protocol and set the motor type to Marklin 5*.

It runs well with the decoder, but there are two problems.
1. I need to turn off all of the acceleration and deceleration delay (usually F4 on a Marklin decoder) so that I can calibrate the loco using WinDigiPet. I thought it was the F6 (see the list below), but this made the loco run at half-speed.

Key Functions
F0 front light
F1 sound on/off
F2 Air Horn
F3 bell
F4 radiator fan
F5 heavy load
F6 acceleration/brake time, shunting mode/shunting speed
F7 curve squeal
F8 AUX#1
F9 compressed air let off
F10 conductor's signal
F11 coupler clank

Is there some other way to set a F4 equivalent for these decoders?

2. While it was in F6 mode, the two slowest speed steps (WDP uses 15 steps - spread across the whole range - so they would have been steps 8 and 17 of the 126) were very jerky/surging. At higher speeds the loco ran smoothly. Any thoughts on this one?

Fixed after some experimentation!

The function is "Accelerate" and not "Shunting mode" or "Shunting speed" as I first thought. I added this to F8 and now all works well.