I agree. Every time I have mentioned it the discussion ends up with "It's a bad idea to run servos from modbus". I couldn't agree more but it could be very usful for simple digital I/O very safely.
Dave On Tue, 2008-10-21 at 09:25 +1000, Peter Homann wrote: > Rather than writing "another" serial interface why not use Modbus and a > device like the ModIO > http://homanndesigns.com/store/index.php?main_page=product_info&cPath=2&products_id=4 > > The Modbus protocol is extremely robust and has a number of saftey > features built in. > > Cheers, > > Peter. > ------------------------------ > http://www.homanndesigns.com > > Jeff Epler wrote: > > For "slow I/O" like coolant, a device attached to a serial or USB port > > can be appropriate in emc2. You'll probably have to write your pic > > firmware and an emc2 "hal" driver in tandem, since there's not an > > established protocol for this (unlike, say, step&direction signals). > > > > Conceptually, the PC side is pretty easy: > > 1. open communication with remote device > > 2. initialize hal and create pins and parameters according to device > > details > > 3. loop forever, reading device inputs and writing device outputs > > according to the bandwidth of the serial link > > > > I did something along these lines with an AVR (arduino), which you might > > find useful: > > http://axis.unpy.net/01198594294 > > > > Jeff > > > > ------------------------------------------------------------------------- > > This SF.Net email is sponsored by the Moblin Your Move Developer's > > challenge > > Build the coolest Linux based applications with Moblin SDK & win great > > prizes > > Grand prize is a trip for two to an Open Source event anywhere in the > > world > > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > ------------------------------------------------- > http://www.homanndesigns.com > > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
