Basler A400K, Руководство пользователя

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Basic Operation and Features
3-46 Basler A400k
DRAFT
3.15 Parameter Set Cache
When the parameter set cache feature is enabled, you can modify the camera’s parameter
settings without the modifications becoming effective immediately.
The parameter set cache feature lets you continue valid image capture while you change your
parameters. For example, while setting a new area of interest with the parameter set cache
feature enabled, you can still capture images using your old area of interest settings.
When the parameter set cache feature is enabled, all modifications are written to the camera but
they do not become active. The camera continues to operate under the control of the old settings.
The modifications will only become active after the parameter set cache feature is disabled again.
When the parameter set cache feature is disabled again, all modifications become active
simultaneously after the last valid frame that used the old settings.
3.15.1 Enabling/Disabling Parameter Set Cache
You can enable/disable the parameter set cache feature by using the Camera Configuration Tool
Plus (CCT+) or by using binary write commands from within your own application to set the
camera’s control and status registers (CSRs).
With the CCT+
With the CCT+ (see Section 4.1 ), you use the Parameter Set Cache setting in the Parameter Set
parameter group to enable/disable parameter set cache.
By Setting CSRs
You can enable/disable parameter set cache by writing a value to the Mode field of the Parameter
Set Cache CSR (see page
4-34 ).
See Section 4.2.2 for an explanation of CSRs and Section 4.3.1 for an explanation of using read/
write commands.
L
Parameter set cache is effective for modifications to the video data format, exposure
time control mode, exposure time, frame period, area of interest, and test image only.
Modifications to other parameter settings will become active immediately even if pa-
rameter set cache is enabled.
To avoid rejections (see Section 3.16 ), make sure that your order of modifications
produces valid combinations after every modification. For example, to change the
area of interest from starting column = 861, width = 512 to full resolution, set the start-
ing column to 1 first, and only afterwards the width to 2,352 (see Section
3.8 ). Setting
the width first would cause the modification to be rejected by the camera.