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Rockwell: Ethernet's Momentum in Automation Is Unstoppable

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naperlou
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Re: Only a matter of time
naperlou   12/30/2011 12:54:53 PM
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Ann, you have hit the nail on the head by mentioning protocols like EtherCAT.  There are applications where standard Ethernet/IP can be used, but to replace the more specific bus standards like Fieldbus, you need a deterministic protocol.  These have now been developed.  In the IP realm, the increase in speed to gigabit and beyond helps mitigate some of the determinism issues.

Ann R. Thryft
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Re: Only a matter of time
Ann R. Thryft   1/3/2012 12:23:02 PM
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I see a parallel here, sort of, between control and machine vision. In control there's been a gulf separating the functionality and usability of Ethernet/IP versus the control-specific protocols like EtherCAT and Ethernet Powerlink. In machine vision, there's been a parallel guilf, perhaps not so large, between  various open-sourced protocols like USB or GigE and their vision-specific versions like the very new USB3 Vision, and the not so new GigE Vision. And the gulfs all about that pesky determinism issue.


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