Huanyang VFD inverter modbus base frequency

First off, thanks to all the devs for the great free software.

I have one Huanyang VFD and connect it to two machines (NOT at the same time).
The motors on the machines have different settings for voltage and base frequency etc.
I can setup and control the inverter from both machines ok using different Linuxcnc setups.

The problem I have is to change the base frequency manually using the VFD buttons (PD04), because the base frequency setting was removed from the hy_vfd command in Linuxcnc.

Can this function be added back in and does anyone know another method (for now) to configure the base frequency via rs485?

Thanks for the link.

Yes, I agree the manual isnt clear.

The manual i have states "This parameter must be set according to the rated frequency of operating voltage on the motor's nameplate. Under normal conditions do not change the set value of base frequency at will . If it is
equipped with a special motor this value should be set properly according to the characteristic s o f
the motor's parameters. Otherwise it may cause the damage to the equipment."

The base frequency is normally the inverters continuous maximum frequency that the rated torque is generated.

I have to change PD004 between 50 & 400 hz depending on what motor i'm running using the panel buttons.
If i don't set the value correctly for that motor it won't run when a gcode m3 is commanded.
Its not the end of the world to do it manually, but i think it would been nice to have the full command set available via rs485.

No they aren't the same. The max freq, will set a frequency limit. Base frequency sets the motors name plate rating, (running at higher frequencies will use field weakening.)

To what ever frequency you want as a limit. (Which may or may not be the motors rated freq.)

@Seb I think for completeness it would be good to set PD004 independently, although most people will probably set PD004 & PD005 to the same value.
The base frequency and voltage parameters are used by the vfd to set a ratio according to a set pattern in the firmware which will produce the rated torque and motor flux. Its possible to use a motor outside its voltage and frequecy parameter set for different torque requirements if you have the ability to "tune" these values.

I also noticed that PD143 number of motor poles is also missing, which would be need to ensure the correct speed of a motor.

@Seb Thank you.

I'll try to test this early next week as i'm not at my workshop just now.

I've not tried either run-in-place or installed manually. I'll follow the instructions at linuxcnc.org/docs/devel/html/code/building-linuxcnc.html and see how it goes. :)