[etherlab-users] delays in the etherlab I/O blocks?
Julian Stoev / Юлиан Стоев
julian.stoev at gmail.com
Mon Oct 19 15:19:36 CEST 2009
On Mon, Oct 19, 2009 at 11:36 AM, Florian Pose <fp at igh-essen.com> wrote:
> I think the phase delay originates from the way, the EtherCAT bus is
> operated. After setting your outputs, the outputs are sent to the
> slaves, while the current slave inputs are queried at the same time(!).
> That means, that the response to your outputs is received at minimum one
> cycle later, that's why it depends on the IO cycle time.
I am not sure I understand exactly. Do you mean that querying and
actual reading of the slaves should be regarded as two different
samples. The command is given to query. The values become available on
the next time sample?
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