Festo SBO***-Q Series, Manual

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4. Commissioning
4-37
Festo P.BE-SBO-Q-EN en 1602e
Example The example in Fig. 4/10 shows a screw located in the
trigger field area.
The number of pixels is determined whose brightness lies
between the following system parameters:
– 0 ( black ) = “Grey value threshold for trigger dark”
– 90 (dark grey ) = “Grey value threshold for trigger light”
The number of these pixels corresponds here to a share of
16% of the trigger field area. This value is displayed in the
“Live image” window.
The following conditions must be fulfilled so that the image-
based trigger is tripped:
– Trigger threshold = 10%
– Initiate trigger with “rising edge”
The specified conditions are fulfilled, so the image-based
trigger is tripped. In the “Live image” window, this is shown
by a red border around the trigger field area.
When the specified conditions of the image-based trigger are
not fulfilled, this is shown with a blue border in the trigger
field area.