O'right I'll try in practice tomorrow.
Thank you so far.

I want to be sure, do you mean that I sense the current of phase of the motor?
But not the sum of the motor and the battery connection currents?

My misunderstanding! I measured the value udc over the battery not over the dc bus of the inverter.
Now the Buck mode started up. There is still something strange about measuring current.

I would like to return to the original post:
- position for the current sensor?
- behavior of the start input?

Yes, L1 is 50 Vdc and it's in the bus via precharge relay.

I started to test my Buck Mode Charger. Driving modes run as they should but the charger mode has some troubles.

Below you can find pics of my Buck Connections, parameters and spot values.

The Battery voltage is 38 V and the charging bus voltage is 50 V.
Relay DC1 powers up the inverter.
Both the ...

Hi Johannes,
a couple of questions of the input SIG_Start (pin 7):
- is it a button type input in the inverter mode?
- if so, is it any harm to use a continuous HIGH State?
- is it an unused input in the Buck Mode Charger?

In the picture below is a principle of the Buck Mode Connection.
Which one ...

Good news, now the regen works. I had wrong specs of the encoder.
Number of pulses per revolution is 80, not 64 as I was told.
I am still a little confused why the manual mode didn't work at negative
fslipspnt values. But all the same thank you for your patience.

Manual mode measurements.

I tryed once again the transition from 20 to 3 and the transition from 20 to -20.
For some reason the negative values of fslipspnt don't work. The negative values act alike zero.

Then I made some measurement from the pin GTOP of the driver board.
It seems like the ...

Here are the pictures of my main board and the changes of the schema.
I'm wondering if it is meant to be a short circuit between pins PA6/TIM3_CH1 and PD2/TIM3_ETR
as is seems to be in the case of a single channel encoder?

I'm using the V2 main board and a single Chanel encoder connected to pin 3.
I tested the encoder and it looks working ok. 1000 rpm on the plot diagram is almost
same as 1000 Hz from the encoder (numimp 64, chA).
Positive values in manual mode worked perfectly. Negative fslipspnt values acted as zero ...

Hi Johannes,

I've added some potnom/speed-plots with different param values.
In all cases, the change in speed works the opposite of what it should
at a certain braking value.
The motor starts and accelerates smoothly at the positive values but
it starts to accelerate at high braking values and ...

Hi all. I'm running my tests : version 4.65.R-sine, opmode start 1, battery 38 V, motor Ansaldo 30/60 kW.
For some reason the engine starts to accelerate at potnom values less than -30 %.
I hope someone knows what I've done wrong. Seppo