The Frame Trigger Wait Signal - Basler ace acA640-90gm User Manual

Selecting the Acquisition Trigger Wait Signal as the Source Signal
for the Output Line
The acquisition trigger wait signal can be selected to act as the source signal for camera output
line 1. Selecting a source signal for the output line is a two step process:
Use the Line Selector to select output line 1.
Set the value of the Line Source Parameter to the acquisition trigger wait signal.
You can set the Line Selector and the Line Source parameter value from within your application
software by using the Basler pylon API. The following code snippet illustrates using the API to set
the selector and the parameter value:
Camera.LineSelector.SetValue( LineSelector_Out1 );
Camera.LineSource.SetValue( LineSource_AcquisitionTriggerWait );
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon API and the pylon Viewer, see Section 3 on
For more information about changing which camera output signal is selected as the source signal
for the output line, see Section 6.2.1 on
For more information about the electrical characteristics of the camera's output line, see Section 5.8
on page 47.

7.10.4.2 The Frame Trigger Wait Signal

Overview
As you are acquiring frames, the camera automatically monitors the frame start trigger status and
supplies a signal that indicates the current status. The Frame Trigger Wait signal will go high
whenever the camera enters a "waiting for frame start trigger" status. The signal will go low when
an external frame start trigger (ExFSTrig) signal is applied to the camera and the camera exits the
"waiting for frame start trigger status". The signal will go high again when the camera again enters
a "waiting for frame trigger" status and it is safe to apply the next frame start trigger signal.
If you base your use of the ExFSTrig signal on the state of the frame trigger wait signal, you can
avoid "frame start overtriggering", i.e., applying a frame start trigger signal to the camera when it is
not in a "waiting for frame start trigger" acquisition status. If you do apply a frame start trigger signal
to the camera when it is not ready to receive the signal, it will be ignored and a frame start
overtrigger event will be reported.
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Image Acquisition Control
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