IDEC DATAVS2 Series - Manual (Page 34)

SVS2 Series Instruction Manual
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8. GRAPHIC USER INTERFACE
8.1. Modes of operation
There are two modes of operation available:
• On Line with active sensor connection;
• Off Line in which you may process images previously stored on the personal computer.
The latter mode lets you simulate inspection using previously stored images instead of the video flow
sent by the sensor. This way, you may focus your attention on the controls to determine which ones
are best suited for a given inspection and set their parameters.
8.2. Trigger
The term trigger means a signal generated by an event that triggers another event.
In our instance, the trigger is a signal generated by a device that triggers image acquisition.
When the sensor is used to inspect moving objects, it is important to ensure that the object is inside
the shot area at the precise instant the image is captured for processing. To this end, the system
offers three types of triggers in step 2 of the inspection configuration process:
• Continuous.
• Hardware Rising;
• Hardware Falling;
Trigger hardware: The image capture signal is supplied by an external device (e.g., a photocell);
obviously enough, the signal has a rise and a fall edge (Rising and Falling).
If you select “Hardware Rising” from the pull-down menu, the image capture signal follows the rising
edge of the external device:
If you select “Hardware Falling” from the pull-down menu, the image capture signal follows the falling
edge of the external device:
Continuous trigger: The images to be processed are acquired at the highest speed possible. Each
individual image is acquired and immediately processed; as soon as the sensor is ready, the next
image is acquired and so on.
Image
acquisition
Processing
Pass /
Fail
Photocell
INSPECTION
trigger