For my setup it often takes a second or two for all the drives to respond to the "start" command and send back the "I am starting but not up to speed yet" signal to Linuxcnc. I was able to connect the VFDs state signal to a image_u32 in pyvcp, to give a visual of the drives state, (fault,fault-locked, start-pending, stopped, dc-braking, run-at-0hz, running at speed, accelerating, decelerating, current-limiting, decel-override, and lower trans. switching-on). Kind of gives you a warm feeling to see all those brightly colored and labeled boxs blinking, changing colors, and words when the motors turn on/off.
----- Original Message ----- From: "77dab" <77...@tiscali.it> To: emc-users@lists.sourceforge.net Sent: Friday, December 19, 2014 4:19:06 AM Subject: Re: [Emc-users] Modbus Yes, I know, I already made a Java software to control independently 8 of those VFD via modbus, and it works. They can run up to 38600baud. what timing do you think i can expect from a sistem like that in LinuxCNC? something like 10 VFD messages per second? or better? On 18/12/2014 14:57, Todd Zuercher wrote: > I am controling 8 VFDs on a single machine with Linuxchc through one > USB-RS485 converter (from Automation direct). No real problems for me except > some random com errors. It works good enough though. I have not had to > restart or anything like that because of them. They do fill up an error log > pretty fast when running from terminal. It can be a little slow to respond > sometimes, reading and writing to 32 different registers at 9600bps plus > rewrites for bad com. > > It can be a little tricky to set up, you have to know all the modbus details > about your drives (every manufacturers drives are different), and configure > mb2hal to use them (there is nothing automagic here). > > ----- Original Message ----- > From: "77dab" <77...@tiscali.it> > To: Emc-users@lists.sourceforge.net > Sent: Thursday, December 18, 2014 6:53:40 AM > Subject: [Emc-users] Modbus > > Hi all, > I have on my hand some mitsubishi VFD with 550w winches. > I would like to try to move them using LinuxCNC. > the thing is not meant to be Real time, and I've read the modbus module > lives in User space and it's not RT. > So, my question: > Since it isn't RT, can I drive the rs485 thru a USB->rs485 converter, > using a laptop? > > Thanks, Davide. > > ------------------------------------------------------------------------------ > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & more > Get technology previously reserved for billion-dollar corporations, FREE > http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server > from Actuate! Instantly Supercharge Your Business Reports and Dashboards > with Interactivity, Sharing, Native Excel Exports, App Integration & more > Get technology previously reserved for billion-dollar corporations, FREE > http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
