[etherlab-users] Knowing when the packet has finished

Richard Hacker ha at igh-essen.com
Thu Oct 20 15:15:35 CEST 2011


> What we are proposing:
> 
> - You wake up in the morning.
> - You tell the postman to go bring you the newspaper of **today**
> - You know it takes the postman roughly 2 hours to go and return, so you go
> to sleep again.
> - You wake up first after 2 hours, then every half hour to check if the
> postman has arrived. Most likely, if he hasn't arrived the first time you
> check he will the second time.
> - When he arrives, you take the newspaper of today, read it for 20 minutes
> and report to the president.
And then what??? What does the president do with the information??? Remember, 
there is no postman going out today any more. The reaction to today's events 
are in the newspaper tomorrow only. So what is the difference of your 
system??? *There is no difference!*

The answer is still NO. EtherCAT does not know when the packet has arrived. So 
it will not be able to report that information to you! Except of having more 
hassle, your proposal does not change anything.

What we are aguing about is: What came first, the hen or the egg?? If you can 
answer me that, then I will start to review the EtherCAT system, promise.


Mit freundlichem Gruß

Richard Hacker

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Richard Hacker M.Sc. 
richard.hacker at igh-essen.com
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