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available wrote:
<blockquote
cite="mid:BANLkTinCKM-Y9aLmRnjtw03RjHBhfYT2vw@mail.gmail.com"
type="cite">Hi,<br>
<br>
I am interested in testing the latency of ethercat systems, please
let me know how to do it with a system with one EtherCAT Master
and a couple of Digital slave I/O nodes. I am looking at the
latency of communication between Master and Slave node.<br>
</blockquote>
<br>
The "latency is mainly defined by the size of the transmitted
Ethernet packages. The transmission of a packet with a minimum
packetsize of ~60 bytes is in the range of 5us.<br>
You have still to add the cycle time of the master statemachine ...
so the absolute smallest latency is then in the range of ~15us. With
a full packet size you have to count with a latency of 150 -200us.<br>
<br>
Cheers<br>
<br>
--Armin<br>
<br>
<br>
<br>
<br>
<blockquote
cite="mid:BANLkTinCKM-Y9aLmRnjtw03RjHBhfYT2vw@mail.gmail.com"
type="cite">
<br>
/Able<br>
<br>
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</pre>
</blockquote>
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