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AW00118501000 Acquisition Control

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6 Acquisition Control

This section provides detailed information about controlling the acquisition of image information.

You will find details about triggering line acquisition, about setting the exposure time for acquired

lines, about setting the camera’s line acquisition rate, and about how the camera’s maximum

allowed line acquisition rate can vary depending on the current camera settings.

The following elements are involved in controlling the acquisition of lines:

 the line start trigger

 exposure time control

6.1 Line Start Triggering

The line start trigger is used to start a line acquisition. Keep in mind that the camera will only react

to a line start trigger when the line start trigger is valid. If the line start trigger is invalid, line start

triggers will be ignored.

The first parameter associated with the line start trigger is the Trigger Mode parameter. The Trigger

Mode parameter has two available settings: off and on.

6.1.1 Line Start with Trigger Mode = Off

When the Trigger Mode parameter is set to off, selection of a source signal for the line start trigger

is not required. With the trigger mode set to off, the camera operates the line start trigger

automatically. The rate at which the line start triggers are generated will be determined by the

camera’s Acquisition Line Rate Abs parameter:

 If the parameter is set to a value less than the maximum allowed line acquisition rate, the

camera will generate triggers at the rate specified by the parameter setting.

 If the parameter is set to a value greater than the maximum allowed line acquisition rate, the

camera will generate line start triggers at the maximum allowed line rate.

For more information about the maximum allowed line rate, see Section 6.4 on page 66.

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Basler A400K Manual do Utilizador Página 51