It is not known, when the user stops the acquisition (indefinite sequence).•
Using AcquisitionStart as the trigger source, it could take between 10 and 40 ms until the camera
acquires the first frame. That's not really an immediately acquisition start. It is recommended to use
FrameStart as the trigger source instead. However, according to the time the trigger event occurs,
there will be a timeout during the first frame in nearly all cases.
You can avoid this using a timer which generates a "high" every 100 us and which is connected to
the trigger input Line4 using a logical AND gate. I.e. if the timer is "high" and there is a trigger signal
at Line4 then the logical conjunction is true. The AND gate result is then connected as
TriggerSource of the FrameStart trigger using a logical OR gate. I.e. as soon as the logical AND
conjunction is true, the trigger sourde is true and the image acquisition will start.
The following figure illustrates the settings:
Figure 1: Schematic illustration of the settings
With this setting, there is still an acceptable time delay of approx. 100 to 130 us possible.
18.4.6.2 Creating the use case using wxPropView
First of all, we have to set the timer in "Setting -> Base -> Camera -> GenICam -> Counter And
Timer Control" with following settings:
Property name
wxPropView
Setting
Timer Selector Timer1
Timer Trigger
Source
Timer1End
Timer Duration 100.000
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