Seb,

I had that graphic taped up on the wall at my last job:-)  Never did use
it, but thought it was cool.

Anyway, after looking at it again, none of the standard I/O outside of
limits and motor control is real-time, so I guess it doesn't matter...

Thanks,
Mark


===============================================

It is true that USB is not realtime.

Check out this diagram (it's only slightly out of date):

http://linuxcnc.org/docs/2.7/html/code/Code_Notes.html#_architecture_overview

Notice at the bottom there are both realtime hardware devices and
non-realtime hardware devices.  Modbus generally falls into the
non-realtime category, so it isn't hurt by USB's lack of realtime.


--
Sebastian Kuzminsky
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