User`s manual

Image Acquisition Control AW00098504000
104 Basler ace Camera Link
7.6.2.2 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 over
trigger error will be declared.
Figure 29 illustrates the Frame Trigger Wait signal. The camera is set for the trigger width exposure
mode with rising edge triggering and with exposure and readout overlapped.
For more information about the over trigger error, see Section 10.10 on page 208.
The frame trigger wait signal will only be available when hardware frame start
triggering is enabled.
Frame Acquisition N
Exposure Readout
Time
Frame Trigger
Wait Signal
Frame Acquisition N+1
Exposure Readout
Frame Acquisition N+2
Exposure Readout
ExFSTrig
Signal
= Camera is in a "waiting for
frame start trigger" status
Fig. 29: Frame Trigger Wait Signal