modbus

Hi guys
My name is Flavio and I'm from Brazil
I need help on modbus + linuxcnc
I Santerno's VFD (RS 485) and I need to do communication "Modbus"
Could someone send me an example with "ini.file e hal.file" and whatever else is necessary so that I can understand how you do the setup

thank you very much

Thank you for your help
but my problem is complicated.
need "step by step" to install "vfs11"
I downloaded the files, read how to compile, compiled and failed.
I guess I did not install correctly.

I'm reworking a "milling center" 16 tools
3 axes (servo system)
16 tools tool changer
spindle: vfd rs485 modbus rtu
read rpm
read current
read write frequency
write on / off
write cw / ccw
read encoder
adress serial / dev/ttyUSB0
adress slave = 1
baudrate = 9600
parity = none
stopbit = 1
bitdata = 8



here in Brazil when we want to say thank you for a help
Valeu cara!

andypugh wrote:

That's quite a machine.

Looking at the data sheet, I don't see a Write address for output frequency.

Adress is 0x0004 frequency reference

ok?

hello
I did a serial communication with python, it works!
but i dont know how to make it interact with the linuxcnc
how do I get it to work with linuxcnc

example:

to enter the MDI "m3 sxxx"
take the value of "s" should be passed to the python
python and make communication with the VFD

#! /usr/bin/python
import linuxcnc
import minimalmodbus

vfd_sinus = minimalmodbus.Instrument('/dev/ttyS0', 1)
s = linuxcnc.stat()
s.poll()

#spindle speed

if s.spindle_speed < 0:
set_rpm = ((s.spindle_speed**-1)/0.30)
else :
set_rpm = (s.spindle_speed/0.30)

vfd_sinus.write_register(4, set_rpm, 0)

# on/off spindle

onoff = vfd_sinus.read_register(5, 0)
bin_onoff = bin(onoff)
spindle_cmd = s.mcodes[2]
if spindle_cmd == 3 :
set_onoff = int(bin_onoff[2:12] + '0' + '1'+ '0', 2)
if spindle_cmd == 4 :
set_onoff = int(bin_onoff[2:12] + '1' + '0'+ '0', 2)
if spindle_cmd == 5 :
set_onoff = int(bin_onoff[2:12] + '0' + '0'+ '1', 2)

vfd_sinus.write_register(5, set_onoff, 0)