[etherlab-users] Measuring the frequency of master sending the frames to network

Mohsen Alizadeh Noghani m.alizad3h at gmail.com
Tue Oct 2 11:50:12 CEST 2018


In motion control applications, smooth motion and small error often
requires an update rate of at least 1 KHz.
When defining a task in RTAI, we can set its execution frequency.
Therefore, if we set the frequency to 2 KHz, the master is expected to send
EtherCAT frames every 0.5 ms + jitter.
Other than using a network probe (e.g. Beckhoff ET2000) connected to
another PC and analyzing the timestamps, is there a reliable way for
measuring this frequency? In other words, I want to stress test the master
for a few hours and make sure that all frames are sent before the real-time
deadlines.
Best,
Mohsen
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