> for work buy device in china every mount from 3 year ... so I have my > little opinion ... You are in right about china ... but actually the > producer is focused on ethercat (due to state research grants and because > ethercat is other standards fieldbus). So that the future of powerlink is > much more connected to Europe and to USA than to china.
As I understand Ethercat is daisy chain, like shift registers connected in series with hardware support to change bits while they are shifted thru and calcuta CRC. This make possible sending from several nodes in each message but there is a need for two Ethernet ports which add cost. There is an advantage with two rings in opposite direction for several reasons but it also increas price. As I understand Powerlink is the ordinary switch based approach, only one Ethernet port is needed but then sending from several devices more messages per second is required. Nicklas Karlsson ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
