Festo SBO Q Series, Руководство пользователя

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4. Commissioning
4−29
Festo P.BE−SBO−Q−EN en 0702a
If the required evaluation period is longer than the defined
frame rate, images are intermediately stored in the device.
The output time can be shifted by several cycle periods.
If intermediate storage is no longer possible, the device
enters an error state or outputs a warning (can be configured
via system parameter Image buffer overflow"). Intermedi
ately stored images are lost here.
This evaluation mode is especially suitable for time−critical
tests, in which the inspection part cannot be stopped or
where a constant test rate is required, e. g. for endless
material testing.
Intermediate image storage should only be used to compen
sate for fluctuations in the evaluation duration. The frame
rate should not be chosen higher than the average evaluation
duration.
If the evaluation mode fixed frame rate" is stopped (trigger
signal" input = logical 0), then any intermediately stored
images are completely evaluated and the test result output
only after this does the output ready for operation" go to
logical 1.