Zombieverter & Gen2 Leafstack - RPM surging in Forward direction but stable in Reverse

[tom91]

udcsw of 360volts had been ovverwritten by the actions of starting up the inverter

Not true. The action of going into precharge and the Leaf BMS sending a plausible Battery Voltage (UDC1) has the zombie update the UDCsw to a value based off UDC1.

This is only done with ShuntType = 0 and BmsType = 4

[Iceman96]

Does nothing with the Leaf inverter. As indicated by the spot value description on wiki. https://openinverter.org/wiki/Zombiever ... pot_Values

Hi Tom - thanks for clearing that up for me. I guess the reason I was confused was that I could see the value changing, and I had read this in the Zombie Wiki
“ Apply the Start 12V signal for a short time. The pre-charge relay should turn on, and the voltage available at the inverter and the U1 input of the ISA shunt should quickly rise. If the udc reading goes above udcsw within 5 seconds then the main contactor(s) should close. If all is well, invstat should now be "on", opmode should be "run".

I realise now that the zombie is designed so that it works with lots of different hardware, so it makes sense to me now that not every setting or spot value will apply to me when using it to control the Leaf hardware. I will now have another look at that parameters and spot values list so I can try to improve my understanding of how and which parameters apply to my application.

Now that you have cleared that up for me I will ignore the InvStat in future

[Iceman96]

Not true. The action of going into precharge and the Leaf BMS sending a plausible Battery Voltage (UDC1) has the zombie update the UDCsw to a value based off UDC1.

This is only done with ShuntType = 0 and BmsType = 4

Thanks again Tom for clearing this one up too. It is great that there are people like you on the forum with an intimate understanding of the background code of the Zombie who can clarify things like this. I will now add this to my list of things I dont need to worry about.