Speedcommand Modbus driver for An Altivar ATV71 VFD

Ah, so it used to work and now doesn't?

Did anyone change any settings at the VFD?

Ah, so it used to work and now doesn't?

We had a working setup, but the PC had a disk failure and so I had to set up a new one, compiling the module etc. I managed to get everything running again except the speed of the spindle.

I'm fiddling around with this issue for a while and we had backups of the config files and the setup in the VFD, but I have no idea from when these backups are. Unfortunately I can't ask the guy who set up everything (incl. working speed command) up ....

The problem is my limited understanding of the technical background (but I'm willing to learn ) and that I don't really know where the problem lies: in the settings of the VFD, in the config of LinuxCNC or the source of atv_vfd module.

A factor of 8 sounds like perhaps the data is somehow shifted in the code.
I guess this comes down to what the VFD manual says that the register is meant to contain, and how the HAL module is composing the data.

Maybe the original working config was multiplying by 8?

Can you attach the actual .comp file to a message so that we can see it?

Yes - the developer was so kind and point me to the line in the code, where the frequency is calculated, I changed the relevant factor and now everything is working like expected !

Thanks a lot!