Standard Features AW00011916000
252 Basler scout GigE
12.5.2.1 Operation with the "Always Active" Sequence Control Source
Operating the Sequencer
When the Always Active sequence control source is selected the advance from one sequence set
to the next proceeds automatically in ascending sequence set index numbers as frame start triggers
are received.
The following use case (see also Figure 75) illustrates the operation of the sequencer in controlled
sequence advance mode with Always Active selected as the sequence control source. As images
are captured continuously, the camera advances automatically with no action by the user from one
sequence set to the next in ascending sequence set index numbers. After one sequence set cycle
is complete, another one starts.
In this use case, the Sequence Set Total Number parameter was set to six. Accordingly, the
available sequence set index numbers range from 0 through 5. The frame start trigger is set for
rising edge triggering.
Assuming that the camera is in the process of continuously capturing images, the sequencer
feature operates as follows:
When the sequencer feature becomes enabled, the sequence set cycle starts: The parameter
values of the sequence set with sequence set index number 0 are loaded into the active set
modifying the active set.
When a frame start trigger is received, the camera automatically advances to the next sequence
set: The parameter values of sequence set 1 are used for the image acquisition.
When the next frame start trigger was received, the camera advances to the next sequence
set: The parameter values of sequence set 2 are used for the image acquisition.
When the next frame start trigger was received, the camera advances to the next sequence
set: The parameter values of sequence set 3 are used for the image acquisition.
and so on. Note that the camera has cycled once through the complete sequence set cycle
when sequence set 5 was used. With the next frame start trigger, a new sequence set cycle
starts where sequence set 0 is used.
After the sequencer feature is disabled, the cycling through sequence sets is terminated. The
sequencer parameter values in the active set return to the values that existed before the
sequencer feature was enabled.
This way of operating the sequencer feature is similar to operating it in auto
sequence advance mode when each sequence set is used only once per
sequence set cycle.
Here, however, the first sequence set used for image acquisition after the
sequencer feature was enabled is sequence set 1 as opposed to sequence set 0
in auto sequence advance mode.
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