Basler ace acA1920-155, Руководство пользователя, Страница: 237 / 326

AW00123404000 Features
Basler ace USB 3.0 227
Sequencer States Occurring During Start and in "Sequencer Mode"
In the state diagram ( Figure 87 ) a total of four sequencer sets is considered. The diagram illustrates
sequencer start, sequencer operation in "sequencer mode", and sequencer stop. Operation in
"sequencer configuration mode" (see Section 8.6.1 on
page 214 ) is not illustrated.

As illustrated in Figure 87 , the camera must not acquire images when the sequencer feature is
enabled. Setting the sequencer mode to On will enable the sequencer feature. When a frame
start trigger occurs the sequencer set configured as Sequencer Set Start will be loaded into the
active set and will be used for the first image acquisition. Sequencer Set Start will always be
sequencer set 0 (see Section 8.6.2.2 on
page 217 ).

By using the trigger for path 1, you can cycle through the available sequencer sets. By using
the trigger for path 0 you can return at any time to sequencer set 0 and therewith reset the
cycling.

Setting the sequencer mode to Off will disable the sequencer feature for use with frame
acquisitions.
The parameter values that were in the active set immediately before the sequencer feature was
enabled will reappear in the active set and will overwrite the values of the latest sequencer set.
Effect on Frame Rate
For all cameras except the acA1920-25 and acA2500-14 cameras, the loading of sequencer sets
into the camera’s active set has no effect on the camera’s frame rate as long as all image
acquisitions are carried out along the same path, i.e. along path 1. Switching between paths 0 and
1 can decrease the frame rate.
For the acA1920-25 and acA2500-14 cameras, the loading of sequencer sets into the camera’s
active set will decrease the camera’s frame rate. The frame rate will, however, not decrease as long
as no new sequencer set is loaded.
Using the sequencer feature will affect the frame rates of all cameras if dictated by parameter values
that are controlled by sequencer sets (ExposureTime, AcquisitionFrameRate).