VC Camera Link series
Page 45 of 86
RA14-11A-010
8.5.3
Overlap Trigger Input
When trigger is entered during frame transfer as shown in the figure below, it performs exposure process for
newly entered trigger while transferring the previous data. In this case, shooting images is possible up to the
maximum frame rate (speed of 1/Transfer Time (sec)) regardless of the exposure time.
External Trigger
(CC1 or External)
EXPOSURE
Data Transfer
Image N
Exposure Source (Pulse width / Program exposure time )
Image N+1
Image N+2
Exposure N
Exposure N+1
Exposure N+2
Strobe Out
(FVAL)
Figure 8.10 Camera Operation when Overlap Trigger is entered
Following list shows the operation of camera on exceptional trigger input.
When the trigger signal with the faster period than the maximum frame rate condition is entered, the next
frame transfer is performed before completing the previous frame transfer. This causes the failure of
obtaining overall image.
If new trigger is entered during the exposure process after Exposure Source is set as Program, the newly
entered signal will be ignored. In this case, exposure time is longer than trigger input period and the frame
rate will be slower than trigger input period since all the entered trigger signals cannot synchronize.
Summary of Contents for vieworks LVC-25MC2-30
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