I have a gang router running Linuxcnc and controlling 8 VFDs through one USB-RS485 and the generic Mb2hal driver.
----- Original Message ----- From: "alex chiosso" <achio...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Wednesday, April 1, 2015 5:11:21 PM Subject: Re: [Emc-users] Modbus RS-485 Connection with Mesa? I do believe that you can use LCNC with a usb to RS485 converter and the Modbus protocol by ClassicLadder softplc built into LCNC or the mb2hal component. Alex Il giorno 01/apr/2015 23:04, "Mark Johnsen" <m...@ijohnsen.com> ha scritto: > Alex, > > Yes, the application is industrial grade, but it is quite simple (2 axes of > motion). I only need 1 modbus network to two temp controllers. Since > there are 2, that rules out '1' RS-232 network, but I can use '1' RS-485 > network. Or Seb's USB setup would work. > > I did see on the mesa site the 7I34 8 channel RS-422/485 interface for > Anything I/O. I would think that would work. > > Your comment about industrial grade is my concern about using LinuxCNC at > all. I figure I can try it and if I run into issues I can slap in a brick > PLC (omron, panasonic, etc) w/ some option cards, but that is much more > expensive and less flexible in the long run. I look at LinuxCNC w/ so much > potential and it combines the control and HMI into one piece. I realize it > is not a traditional industrial control solution. If you think I'm crazy > for doing this, let me know now... > > > ---------------------------------------------------------------------------- > > SEB - I can embrace USB. I just thought that was looked down upon due to > the lack of real-time nature of USB ports? Although, I don't really need > real-time here for temp control. Just updating and current temp feedback. > > I think for the price of the mesa board, that seems like a good option and > more trustworthy than the Amazon USB part. Just my 2 cents.. > > Thanks all for your feedback, > Mark > > Hi Mark . > Be careful with this kind of adapters because they are not optocoupled . > If your application is an industrial grade I will spend some more money and > buy something like the Advantech converter/adapter you linked above. > Do you really need to have two separate Modbus network ? > > Alex > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming The Go Parallel Website, > sponsored > by Intel and developed in partnership with Slashdot Media, is your hub for > all > things parallel software development, from weekly thought leadership blogs > to > news, videos, case studies, tutorials and more. Take a look and join the > conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
