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
