Mach3 & GS2 VFD

[AtlasMills]

Anyone set up Mach 3 to control a VFD throuugh MODBus??? I've done it through an analog output, but now I want more control through MODBus.

I'm using a GS2, which can communicate through RS-232/485.

I want to use MODBus to not only communicate frequency/speed, but also forward/reverse, which I don't think is possible on a GS2 with just the Analog signal, hence the need to go to MODBus.

Any previously written macros or hey-I-did-this would be fantastic!

-AtlasMills

[multiplex]

check out this post

http://www.cnczone.com/forums/showpo...7&postcount=14

its pretty straight forward to get this going. Only thing I haven't sorted out is the actual frequency control - just haven't had time.

[AtlasMills]

Sweet. What port are you running it out of on your computer??? I've got a laptop that doesn't have a parallel port... or a serial port...

-Atlas

[multiplex]

pretty sure i'm using this device, also available from automation direct

i just happened to have it from another project, and it worked great.

usb -> serial with rj12 port

http://www.automationdirect.com/adc/.../EA-MG-PGM-CBL

[krak]

AD has just come out with a usb to rs 485 converter
http://www.automationdirect.com/adc/...rters/USB-485M
they also have a kick ass forum