Basler ace acA1920-155, Руководство пользователя, Страница: 225 / 326

AW00123404000 Features
Basler ace USB 3.0 215
The sequencer feature will be disabled when the sequencer configuration mode and the sequencer
mode are both set to Off.
8.6.2 The Sequencer and the Active Set
During operation, the camera is controlled by a set of configuration parameters settings that reside
in the camera’s volatile memory. This set of parameter settings is known as the "active set" .
When you use the pylon API or the pylon Viewer to make a change to a camera parameter such as
the Gain, you are making a change to the active set. And because the active set controls camera
operation, you will see a change in camera operation when you change a parameter value in the
active set. For more information about the active set, see Section 8.17 on
page 288 .
The parameters in the active set can be divided into two types:

Non-sequencer parameters: The parameter values in the active set cannot be changed using
the sequencer feature. This also means that the non-sequencer parameter values cannot be
configured for user sets.

Sequencer parameters: The parameter values in the active set can be changed almost
instantaneously by loading a sequencer set.
The "current set" is the sequencer set whose parameter values were loaded into the active set
with the latest sequencer set advance. The parameter values remain in the active set until they
are replaced by the parameter values of the next sequencer set.
The sequencer parameters can be divided into two types (see Figure 86 ):

Camera parameters for camera control (e.g. exposure time, gain, ROI position and size,
see also Section 8.6.2.1 ).

Sequencer set related parameters for sequencer control. The parameters define the
details of advancing from one sequencer set to the next. This includes the possibility of
choosing between different "paths" for advance, thus allowing to choose between different
sequencer sets (see
Figure 86 and Section 8.6.2.2 ).
When the sequencer feature is in sequencer mode, the parameter values of the
current sequencer set cannot be changed using the pylon API or the pylon Viewer.
Only those sequencer set parameter values will be displayed that were active
before the sequencer was enabled. You will not be able to "see" the parameter
values delivered by the current set.
We recommend that you do not attempt to read or change any of the sequence
parameters when the sequencer feature is enabled.
Because your parameter values for the sequencer sets only reside in volatile
memory, the parameter values will be lost and reset to the default values if the
camera is reset or switched off. You will then have to populate the sequencer sets
with your parameter values again.
Note also that sequencer sets can not be saved in user sets.