Guidelines When Using Free-Run; Selecting A Free-Run Exposure Mode, Setting The Frame Period - Basler A400K User Manual

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Basic Operation and Features
Figure 3-7: Free-run Programmable Mode

3.3.2.2 Guidelines When Using Free-run

In free-run programmable mode, the minimum exposure time setting is 4.56 µs. Due to the sensor
design, the exposure time can only be set in integer multiples of 4.56 µs, that is, 4.56 µs, 9.12 µs,
13.68 µs, and so on.
In free-run programmable mode, also the following rule applies:
≤
Exposure time setting Frame period setting
3.3.2.3 Selecting a Free-run Exposure Mode, Setting the Frame Period, and
Setting the Exposure Time
You can select a free-run exposure time control mode, set the frame period, and set the exposure
time for the free-run programmable mode 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 Exposure Time Control Mode setting in the
Exposure parameter group to select the free-run edge-controlled or free-run programmable
exposure time control mode. If you select the free-run programmable mode, the CCT+ will also let
you enter an exposure time.
By Setting CSRs
You can select the exposure time control mode by writing a value to the Mode field of the Exposure
Time Control Mode CSR (see page 4-15).
You can set the frame period by writing a value to the Raw Frame Period field or to the Absolute
Frame Period field of the Frame Period CSR (see page 4-18).
If you select the free-run programmable mode, you will also need to set the exposure time. You
can set the exposure time by writing a value to the Raw Exposure Time field or to the Absolute
Exposure Time field of the Exposure Time CSR (see page 4-16).
Section 4.2.2 explains CSRs and the difference between using the "raw" field and the "absolute"
field in a CSR. Section 4.3.1 explains using read/write commands.
Basler A400k 3-7