spindle speed via modbus

[Romanr9999]

Is it possible to control the spindle speed using a frequency inverter and sending the speed information from Mach3 via Modbus?

I know I can use PWM or pulse/dir signals, although I´m running out of available pins, so I thought using modbus for this.

[Peter Homann]

Hi,

Yes, if your inverter can communicate via Modbus.

Cheers,

Peter.

[Romanr9999]

Yes, the inverter uses modbus and I know how to set it up for this.
I don´t know how to setup Mach3 to give this information tho the inverter via modbus.

[Peter Homann]

Hi,

Have a look at this thread. It shows how it was done for a Hitachi VFD.

http://www.machsupport.com/forum/index.php/topic,16316.0.html

You will need to look at your manual to find the appropriate registe numbers.

Cheers,



Peter.

[Romanr9999]

Peter,

Thanks a lot!!
I´ll take a deep look at that. It seems to be what I need.