On Sunday 01 September 2013 08:16:51 alex chiosso did opine: > Hi Anders. > > This is one link to the LinuxCNC wiki : EtherCAT LinuxCNC > Wiki<http://wiki.linuxcnc.org/cgi-bin/wiki.pl?EtherCatDriver> > . > > Alex
Being a wee bit picky here, that is an interesting read for someone contemplating using ethercat as the comm channel. The author, who goes by Sacha, writes on that page to contact him for testing other similar hardware, but neglects to link his email, and the obvious link at the bottom of the page exists, but is empty. The last post to this list by Sacha was on Aug 11, so Sacha Ittner can be found in the list history, 200-400 messages back up the list here. Shouldn't it be easier? > On Fri, Aug 30, 2013 at 4:36 PM, Anders Wallin > > <anders.e.e.wal...@gmail.com>wrote: > > Hi all, > > > > I'm thinking about various control & data-acquisition systems I want > > to build, with different requirements on speed & performance. > > > > What's the status of Modbus TCP with linuxcnc right now? I found at > > least this wiki page: > > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?ModbusToHal > > > > What I imagine doing is something along these lines: > > - Have a controller computer with ethernet (particular NIC card is > > critical?), using linuxcnc/hal for my control and datalogging > > - wire all devices to a dedicated ethernet switch (particular > > make/model critical?) > > - use ready made Modbus TCP devices for analog and digital IO, I found > > interesting ones here http://www.audon.co.uk/edam9000.html but I > > imagine there are many more > > - make my own Modbus TCP RTU (remote terminal unit) using e.g. Arduino > > Ethernet > > > > http://arduino.cc/en/Main/ArduinoBoardEthernet > > > > Any experience with the latency/jitter for this approach? For some > > slow applications like temperature control/logging 1ms jitter will > > make no difference, but for e.g. motor control it might be critical. > > > > thanks, > > Anders > > > > ---------------------------------------------------------------------- > > -------- Learn the latest--Visual Studio 2012, SharePoint 2013, SQL > > 2012, more! Discover the easy way to master current and previous > > Microsoft technologies and advance your career. Get an incredible > > 1,500+ hours of step-by-step tutorial videos with LearnDevNow. > > Subscribe today and save! > > http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.c > > lktrk _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------ > ------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, > more! Discover the easy way to master current and previous Microsoft > technologies and advance your career. Get an incredible 1,500+ hours of > step-by-step tutorial videos with LearnDevNow. Subscribe today and > save! > http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clk > trk _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> Given my druthers, I'd druther not. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
