Image Acquisition Control AW00089317000
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7.4.1.2 Frame Start Trigger Mode = On
When the Trigger Mode parameter for the frame start trigger is set to on, you must apply a frame
start trigger signal to the camera each time you want to begin a frame acquisition. The Trigger
Source parameter specifies the source signal that will act as the frame start trigger signal. The
available selections for the Trigger Source parameter are:
Software - When the source signal is set to software, you apply a frame start trigger signal to
the camera by executing a Trigger Software command for the frame start trigger on the host
PC.
Line 1 - When the source signal is set to line 1, you apply a frame start trigger signal to the
camera by injecting an externally generated electrical signal (commonly referred to as a
hardware trigger signal) into physical input line 1 on the camera.
If the Trigger Source parameter is set to Line 1, you must also set the Trigger Activation parameter.
The available settings for the Trigger Activation parameter are:
Rising Edge - specifies that a rising edge of the electrical signal will act as the frame start
trigger.
Falling Edge - specifies that a falling edge of the electrical signal will act as the frame start
trigger.
For more information about
using a software trigger to control frame acquisition start, see Section 7.4.2 on page 100.
using a hardware trigger to control frame acquisition start, see Section 7.4.3 on page 103.
Exposure Time Control with the Frame Start Trigger On
When the Trigger Mode parameter for the frame start trigger is set to on and
the Trigger Source parameter is set to software, the exposure time for each frame acquisition
is determined by the value of the camera’s Exposure Time Abs parameter.
the Trigger Source parameter is set to input line 1, the exposure time for each frame
acquisition can be controlled with the Exposure Time Abs parameter or it can be controlled by
manipulating the hardware trigger signal.
For more information about controlling exposure time
when using a software trigger, see Section 7.4.2 on page 100.
when using a hardware trigger, see Section 7.4.3 on page 103.
By default, input line 1 is selected as the source signal for the frame start trigger.
The camera will only react to frame start trigger signals when it is in a "waiting for
frame start trigger" acquisition status. For more information about the acquisition
status, see Section 7.1 on page 83 and Section 7.3 on page 89.
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