Festo SBO***-Q Series, Руководство пользователя

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4. Commissioning
4-39
Festo P.BE-SBO-Q-EN en 1602e
4.9.3 I/O sequence with the “Fixed frame rate” evaluation mode
This evaluation mode is not available in SBO...-Q-R3.
The “Fixed frame rate” evaluation mode remains active as
long as logic 1 (condition-controlled) is present at the
“Trigger signal” input.
– During this time, images are generated in a specified
cycle.
– During the evaluation, the “Ready for operation” output
shows logic 0.
Image creation and lighting are started with the cycle start.
Only the duration of the lighting can be influenced via system
parameters.
Evaluation and output of the results are temporally de­
coupled from each other.
– The images are generated in a fixed time cycle.
– The time until output of the related images is postponed
depending on the evaluation duration of the current
image and, if necessary, of the previous images as well.
A rising edge at one of the outputs signals that an evaluation
has been completed.
Set the system parameter “Reset outputs at outputs
during evaluation” = Yes.
If the required evaluation duration is longer than the estab­
lished frame rate, images are stored temporarily in the
device. The output time can be postponed by several cycles.
If temporary storing is no longer possible, the device enters
a fault status or emits a warning (configurable via “Image
buffer overflow” system parameter). Temporarily stored
images are lost thereby.