Festo SBO***-Q Series, Руководство пользователя

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4. Commissioning
4-33
Festo P.BE-SBO-Q-EN en 1602e
Simplified depiction of the signal curves; these do not contain
jitter, run times or system-related delay times.
The duration for the write process of the outputs and thus the
duration for an invalid output condition is indefinite with use
of external outputs (I/O expansion, device as CPI module,
EasyIP or CheckKon). This duration is approximately 1 ms if
the external outputs are deactivated by system parameters
and only the internal outputs are used.
“Free run” evaluation mode with image-based
trigger (only SBO...-Q-R...B)
The “Free run” evaluation mode also offers the possibility to
set up a image-based trigger.
This combination is only available in types SBO...-Q-R...B
(monochrome image sensor).
The function of the “Free run” evaluation mode with image-
based trigger is similar to that of the “Triggered” evaluation
mode. However, the trigger signal is not tripped from outside,
but depends on the content of the current camera image.
Procedure As long as the Free run mode with image-based trigger is
activated (e.g over the input I0 “Trigger signal” = logic 1),
the device permanently takes camera images.
With each camera image, a check is made whether condi­
tions of the image-based trigger are fulfilled:
Condition not fulfilled The camera image is deleted without further analysis (that
is, without pre-processing, feature determination, quality
decision, output, etc.), and the next camera image is taken
immediately. As a result, camera images can be checked in
very fast sequence for fulfillment of the conditions of the
image-based trigger.