User`s manual

Features AW00098504000
202 Basler ace Camera Link
10.9.5 Exposure Auto
Exposure Auto is the "automatic" counterpart to manually setting the Exposure Time Abs
parameter. The exposure auto function automatically adjusts the Exposure Time Abs parameter.
within set limits until a target average gray value for the pixel data from the related Auto Function
AOI is reached.
The exposure auto function can be operated in the "once" and continuous" modes of operation.
If the related Auto Function AOI does not overlap the Image AOI (see the "Auto Function AOI"
section), the pixel data from the Auto Function AOI will not be used to control the exposure time.
Instead, the current manual setting for the Exposure Time Abs parameter will control the exposure
time.
The exposure auto function and the gain auto function can be used at the same time. In this case,
the auto function profile feature also takes effect. By default, the auto function profile feature
minimizes gain.
When trigger width exposure mode is selected, the exposure auto function is not available.
For more information about the "manual" exposure time setting, see Section 7.4 on page 94.
For more information about the trigger width exposure mode, see Section 7.3.3.2 on page 87.
For more information about the auto function profile Section 10.9.6 on page 205.
The limits within which the camera will adjust the Auto Exposure Time Abs parameter are defined
by the Auto Exposure Time Abs Upper Limit and the Auto Exposure Time Abs Lower Limit
parameters. The current minimum and the maximum allowed settings for the Auto Exposure Time
Abs Upper Limit parameter and the Auto Exposure Time Abs Lower Limit parameters depend on
the minimum allowed and maximum possible exposure time for your camera model.
The Auto Target Value parameter defines the target average gray value that the exposure auto
function will attempt to achieve when it is automatically adjusting the Exposure Time Abs value. The
target average gray value can range from 0 (black) to 255 (white) when the camera is set for an 8
bit pixel format, from 0 to 1023 when the camera is set for a 10 bit pixel format, and from 0 to 4095
when the camera is set for a 12 bit pixel format.
The exposure auto function will not work if the camera’s exposure mode is set to
trigger width. For more information about the trigger width exposure mode, see
Section 7.3.3.2 on page 87.
If the Exposure Time Abs Upper Limit Parameter is set to a sufficiently high value,
the camera’s maximum allowed frame rate may be decreased.