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.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
