Acquisition Status Indicator - Basler ace acA640-90gm User Manual

Image Acquisition Control

7.10.3 Acquisition Status Indicator

If a camera receives a software acquisition start trigger signal when it is not in a "waiting for
acquisition start trigger" acquisition status, it will simply ignore the trigger signal and will generate
an acquisition start overtrigger event.
If a camera receives a software frame start trigger signal when it is not in a "waiting for frame start
trigger" acquisition status, it will simply ignore the trigger signal and will generate a frame start
overtrigger event.
The camera's acquisition status indicator gives you the ability to check whether the camera is in a
"waiting for acquisition start trigger" acquisition status or in a "waiting for frame start trigger"
acquisition status. If you check the acquisition status before you apply each software acquisition
start trigger signal or each software frame start trigger signal, you can avoid applying trigger signals
to the camera that will be ignored.
The acquisition status indicator is designed for use when you are using host control of image
acquisition, i.e., when you are using software acquisition start and frame start trigger signals.
To determine the acquisition status of the camera via the Basler pylon API:
Use the Acquisition Status Selector to select the Acquisition Trigger Wait status or the Frame
Trigger Wait status.
Read the value of the Acquisition Status parameter.
If the value is set to "false", the camera is not waiting for the trigger signal.
If the value is set to "true", the camera is waiting for the trigger signal.
You can check the acquisition status from within your application software by using the Basler pylon
API. The following code snippet illustrates using the API to check the acquisition status:
// Check the acquisition start trigger acquisition status
// Set the acquisition status selector
Camera.AcquisitionStatusSelector.SetValue
( AcquisitionStatusSelector_AcquisitionTriggerWait );
// Read the acquisition status
bool IsWaitingForAcquisitionTrigger = Camera.AcquisitionStatus.GetValue();
// Check the frame start trigger acquisition status
// Set the acquisition status selector
Camera.AcquisitionStatusSelector.SetValue
( AcquisitionStatusSelector_FrameTriggerWait );
// Read the acquisition status
bool IsWaitingForFrameTrigger = Camera.AcquisitionStatus.GetValue();
You can also use the Basler pylon Viewer application to easily set the parameters.
For more information about the pylon API and pylon Viewer, see Section 3 on
114
page 27.
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