[etherlab-dev] EC_USE_HRTIMER slows sdos and bus scan

PAUL-SERVICE SERVICE at paul.eu
Thu Feb 10 08:17:01 CET 2011


Hello,

I noticed that the option EC_USE_HRTIMER slows down the transmission of service data:

I have a Beckhoff EK1100 with one EL2032.
Without HRTIMER the bus scan at startup needs about 90ms, a rescan in idle mode needs ~80ms.
With HRTIMER the bus scan at startup needs about 2750ms, a rescan in idle mode needs ~1400ms.

In this situation it is not really serious, but in my project with some slaves I get a startup bus scanning time of more than 10s.

I also noticed that in operation mode HRTIMER increases the transmission time of sdos up to the double time.

Is there a way to speed up the master with HRTIMER?

Josef


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