Festo SBO***-Q Series, Manual

Page: 109 / 256

4. Commissioning
4-47
Festo P.BE-SBO-Q-EN en 1602e
Note
Reading of input statuses takes place while the check
program is running, following image capture.
The time of reading during image evaluation is however
not precisely defined, i.e. changes to input statuses during
the evaluation period can lead to unexpected results.
Ensure that no changes are made to input statuses
during evaluation.
“Trigger signal” input
The “Trigger signal
”
input starts and stops the inspection
process. Mode of operation, signal detection and signal
sequence depend on the evaluation mode selected
(
è
chapter 4.9.1 ff.).
“Apply Inputs signal” input
The “Apply Inputs signal” is used to load a new check program.
The number of the new check program must be specified
previously via the I/O possibilities. The “Apply Inputs signal”
is edge-controlled detected and only accepted if logic 0
changes to logic 1 at the “Ready for operation” output.
And so the “Apply Inputs signal” must first be reset to read
inputs again (load check program).
As long as the inputs are read and the check program is
loaded, the “Ready for operation” output emits logic 0.
During this time, no parts can be inspected; (The trigger is not
valid as long as the “Ready for operation” output emits logic 0).
As soon as the check program has been loaded, the “Ready
for operation” output emits logic 1 again. Trigger signals for
an inspection are now accepted.