Problem was my clocking, sent out signal to oscilloscope on pin, Ethernet frames where OK but sync manager for data sent from node where for some reason run continuously then Micro controller had nothing else todo instead of only at event only then needed, this randomly delayed signal, forgot at about this first so no increased delay for large messages.
Now I am very happy with result. > I am not an expert on Ethercat, but normal Ethernet timing can vary a LOT > depending on the hardware. Some Ethernet cards are very good and some are > not. Some of this depends on how the card is built and some on how smart > was the software guy who wrote the driver for the card. I > remember swapping out a built-in Ethernet for an Intel brand PCIe card and > seeing a large decrease in CPU utilization. > > So my point is that this may be hard to fix if different people have > different hardware. > > On Sat, May 30, 2020 at 7:14 AM Nicklas Karlsson < > [email protected]> wrote: > > > I have discovered then larger messages is sent over Ethernet there seems > > to be something adding jitter on real time performance, like a few hundred > > micro seconds. Not certain if accessing HAL memory might have performance > > drawbacks, have seen memcpy(...) so do not think so but have not other good > > idea. Anybody have any idea? > > > > Regards Nicklas Karlsson > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > -- > > Chris Albertson > Redondo Beach, California > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
