Using A Hardware Acquisition Start Trigger; Introduction; Setting The Parameters Related To Hardware Acquisition; Start Triggering - Basler GIGE VISION ace acA640-100gm/gc Manual

Area scan cameras

Table of Contents

6.3.5

6.3.5.1

If the camera's Acquisition Start Trigger Mode parameter is set to on and the Acquisition Start

Trigger source parameter is set to line 1, an externally generated acquisition start trigger (ExASTrig)

signal injected into the camera's physical input line 1 will be used to apply an acquisition start trigger

to the camera. (This type of trigger signal is generally referred to as a hardware trigger.)

A rising edge or a falling edge of the ExASTrig signal can be used as the acquisition start trigger.

The Trigger Activation parameter is used to select rising edge or falling edge triggering.

With the camera's Acquisition Start Trigger Mode parameter is set to on, the camera will initially be

in a "waiting for acquisition start trigger" acquisition status. It cannot react to frame trigger signals

when in this acquisition status. When the appropriate ExASTrig signal is applied to line 1 (e.g, a

rising edge of the signal for rising edge triggering), the camera will exit the "waiting for acquisition

start trigger" acquisition status and will enter the "waiting for frame start trigger" acquisition status.

It can then react to frame start trigger signals. When the number of frame start trigger signals

received by the camera is equal to the current Acquisition Frame Count parameter setting, the

camera will return to the "waiting for acquisition start trigger" acquisition status. When a new

ExASTrig signal is applied to line 1, the camera will again exit from the "waiting for acquisition start

trigger" acquisition status and enter the "waiting for frame start trigger" acquisition status.

For more information about setting the camera for hardware acquisition start triggering and

selecting the input line to receive the ExASTrig signal, see Section 6.3.5.2.

For more information about the electrical requirements for Line 1, see Section 5.7.1 on

6.3.5.2

You can set the all of the parameters needed to perform hardware acquisition start triggering from

within your application by using the pylon API. The following code snippet illustrates using the API

to set the parameter values and execute the commands related to hardware acquisition start

triggering:

// Set the acquisition mode to continuous frame (the acquisition mode must

// be set to continuous when frame start triggering is on)

Camera.AcquisitionMode.SetValue( AcquisitionMode_Continuous );

// Select the acquisition start trigger

Camera.TriggerSelector.SetValue( TriggerSelector_AcquisitionStart );

// Set the mode for the selected trigger

Camera.TriggerMode.SetValue( TriggerMode_On );

// Set the source for the selected trigger

Camera.TriggerSource.SetValue ( TriggerSource_Line1 );

// Set the trigger activation mode to rising edge

Camera.TriggerActivation.SetValue( TriggerActivation_RisingEdge );

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