User`s manual

Operation and Features

BASLER A202

k 3-11

DRAFT

3.2.2.1 Recommendations for Controlling Exposure

in Free-run Programmable Mode

When using the free-run programmable mode to control exposure, several general guidelines

must be followed:

• The minimum setting for Timer 1 is 13 µs.

• The minimum setting for Timer 2 is 35 µs.

• The actual length of the exposure time will be equal to the programmed time plus 77.7 µs.

• In free-run mode, the period of the internal control signal is equal to the sum of the Timer 1

setting plus the Timer 2 setting plus 77.7 µs. If the AOI and Binning features are not being

used, the sum of the Timer 1 setting plus the Timer 2 must be greater then 20.83 ms.

• If the AOI feature is being used, the sum of the Timer 1 setting plus the Timer 2 setting must

be greater than 1/Maximum Frame Rate where the maximum frame rate is determined by the

formula on page 3-27.

• If the binning feature is being used, the sum of the Timer 1 setting plus the Timer 2 setting

must be greater than 1/Maximum Frame Rate where the maximum frame rate is determined

by the formula on page 3-31.

If you are using the Camera Configuration Tool Plus to set up the free-run program-

mable mode, the tool will ask you to enter a frame rate and an exposure time. Once

you have entered these numbers, the value for Timer 1 and Timer 2 will be automat-

ically calculated and sent to the camera. If one of the guidelines listed above is vio-

lated, an error message will appear.

When the camera is operating in free-run, external control of exposure start is not

possible. In free-run, the camera generates all control signals internally. The camera

determines when each exposure will start and controls the length of the exposure

time.