Hardware manual

Camera Impact Reference Guide
Datalogic Automation Inc. 2-20
a) If the Auto-trigger When Online check box is checked, automatic triggers will start when the
device goes Online and stop when it goes Offline. The Start/Stop Auto-trigger button is
disabled. No other Start/Stop control is available.
b) If the Auto-trigger When Online check box is NOT checked, the device must be Online to
enable the Start/Stop Auto-trigger button. Automatic triggers will start when the Start/Stop
Auto-trigger button is clicked on and stop when it is clicked off.
How Auto-trigger mode works
After an image is acquired and the ImageIn task begins, the next image acquisition is started. When
the task is complete, processing is delayed the number of milliseconds entered in the Delay field,
then the task begins processing the next image and another image acquisition begins. This is a soft-
ware-generated trigger and does not require a hardware trigger connection.
This mode is especially useful in applications that use a fast tool to sense part presence then branch
to a full inspection when the part is present. The camera triggers quickly when it is just running the
fast tool. When part is present, the camera will not trigger again until the inspection task is done, so
the inspection is self-pacing. Also, if the task execution time changes, the trigger rate does not need
to be changed.
• Delay (milliseconds): (for Auto-trigger mode) This is the delay time between the end of processing
one image in the ImageIn task and beginning to process the next image. The value can be between 1
and 100 milliseconds. Without the delay, the camera may stay too busy to send data to VPM or CPM.
If VPM or CPM is updating very slowly, especially with large images, it might help to increase this
delay, although this will slow the trigger rate.
• Periodic Auto-trigger - This is a fixed-pace auto-trigger mode. The camera is automatically triggered
and ImageIn task execution begins after the image is acquired. After the Delay period expires, the
camera is triggered and the next image acquisition begins even if the previous image’s processing is
incomplete. If the image acquire time plus the delay value is less than the ImageIn task execution
time, triggering is too fast and the image buffers will be overrun.This is a software-generated trigger
and does not require a hardware trigger connection.
How to activate Periodic Auto-Trigger mode
This mode is activated using the same methods as the Auto-Trigger mode.
• Delay (milliseconds): (for Periodic Auto-trigger mode) This is the delay time between camera trig-
gers. This value should be larger than the longest ImageIn task execution time so there is time for all
images to be processed.
• Auto-trigger When Online: If this is checked, triggers will start when the device goes Online and
stop when it goes Offline. The Start/Stop Auto-trigger button is disabled. No other Start/Stop control
is available.
Trigger Input Debounce
Here you can define the debounce time for the device camera trigger signal. Debounce determines the maxi-
mum trigger rate the system will allow (basically like a governor on an engine) to help prevent negative
effects from noise and high frequency bursts. The debounce setting must be able to filter out noise while not
introducing any unnecessary delays.
For more details on debounce settings, see “Input Debounce” on page 2-8.
Partial Scan Tab
Enter values for the left, right, top, and bottom line numbers which control the vertical and horizontal edges
scanned by the camera. You can use this option to decrease the image area scanned and increase the inspec-