Kent Kent A. Reed wrote: > Gentle persons: > > So I've been trying to practice due diligence. The sourceforge mail > archives have been really flaky for me today and the Gmane archives go > back only 2 years, so I started by searching my archive of > emc-users-digest messages that dates from when I subscribed to the > digest in late 2005 for occurrences of 'rtnet'. I found three clusters > of messages. > > 1) Evert Lammerts set off a flurry of messages in Aug 2006 with his > "rt_task_init" message. As he subsequently explained, "We are trying to > make a reliable real-time connection between two EMC computers for > exchange of positional data, which is necessary for the project we're > working on [at NHL University in the Netherlands]". The exchanges ended > with Evert's distribution of his code HAL_RTNET.tar.gz on 06 Sep 2006. > (Of course, I had to coax a very balky sourceforge to disgorge this code > since the digester scrubbed it as a non-text attachment.) I won't be > able to review his code until this weekend. With luck, the code will be > commented and the comments will be in English, not Dutch. (Hope springs > eternal...) > > please post any info the ability to have 2 emc system communicate is very interesting ( robot part and tool servers for cell(s) maybe :) > 2) There was an extended exchange of messages in Oct 2007 beginning with > Jon Elson's "Starting a new project" in which he said he had been > looking at the description of rt-ethernet, answered by Stephen Willie > Padnos observing 'I talked to some folks who had gotten RTNet to work > for their application (power substation monitoring, I think it was). > Apparently it wasn't quite right "out of the box", and they had problems > getting answers from the developer. This was about 18 months ago though, > so things may have changed since then', and continuing with > free-wheeling discussion that ultimately involved 11 respondents. > > yes this effort seems to be realtime communications between 2 emcs does not have to be ( underline 'have' )
> 3) There is the current exchange of messages that began in Oct 2008 > (from which I infer the cycle-time for this topic is ca 1 year) with > "Parallel port in the future - query" and, except for a three-week > hiatus in December, continues today. > > I don't subscribe to emc-developers-digest (maybe I should?). As I said, > I'm having trouble getting the sourceforge mail archives to respond but > it seems that real-time ethernet has been discussed, abeit also > sporadically, since 2004. > > I'll have to mull over these discussions. If you have any other > resources you think would be useful for me to look at, please let me > know. I've already used Google to turn up some interesting articles on > real-time ethernet (but I've only looked at the first dozen hits out of > Google's "approximately 1,170,000 hits" [that's 1.170.000 to you folks > across the ocean] so please be specific. > > Regards, > Kent > > thanks again for the post tomp happy western and eastern new years ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
