The Frame Start Trigger; Frame Start Trigger Mode; Frame Start Trigger Mode = Off - Basler acA2040-55 User Manual

Image Acquisition Control
6.4

The Frame Start Trigger

The frame start trigger is used to begin frame acquisition. Assuming that the camera is in a "waiting
for frame start trigger" acquisition status, it will begin a frame acquisition each time it receives a
frame start trigger signal.
Note that in order for the camera to be in a "waiting for frame start trigger" acquisition status:
The Acquisition Mode parameter must be set correctly.

A proper Acquisition Start command must be applied to the camera.

A proper frame burst start trigger signal must be applied to the camera (if the Trigger Mode

parameter for the frame burst start trigger is set to on).
For more information about the Acquisition Mode parameter and about Acquisition Start and
Acquisition Stop commands, see Section 6.1 on
For more information about the frame burst start trigger, and about the acquisition status, see
Section 6.1 on page 109
Referring to the use case diagrams that appear in Section 6.9 on
understand the explanations of the frame start trigger.
6.4.1

Frame Start Trigger Mode

The main parameter associated with the frame start trigger is the Trigger Mode parameter. The
Trigger Mode parameter for the frame start trigger has two available settings: off and on.
6.4.1.1

Frame Start Trigger Mode = Off

When the FrameStartTriggerMode parameter is set to off, the camera will generate all required
frame start trigger signals internally, and you do not need to apply frame start trigger signals to the
camera.
With the trigger mode set to off, the way that the camera will operate the frame start trigger depends
on the setting of the camera's AcquisitionMode parameter:
If the AcquisitionMode parameter is set to SingleFrame, the camera will automatically generate

a single frame start trigger signal whenever it receives an Acquisition Start command.
If the AcquisitionMode parameter is set to Continuous, the camera will automatically begin

generating frame start trigger signals when it receives an Acquisition Start command. The
camera will continue to generate frame start trigger signals until it receives an Acquisition Stop
command.
The rate at which the frame start trigger signals are generated can be determined by the
camera's AcquisitionFrameRate parameter:
If the parameter is not enabled, the camera will generate frame start trigger signals at the

maximum rate allowed with the current camera settings.
If the parameter is enabled and is set to a value less than the maximum allowed frame rate

with the current camera settings, the camera will generate frame start trigger signals at the
rate specified by the parameter setting.
122
and Section 6.3 on page
page 109 and Section 6.2 on
115.
page 174
AW00123409000
page 113.
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