8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 147
8.6.4. FrameStartOvertrigger Event
When the camera receives the FrameTrigger hardware trigger signal or software trigger signal, if the front-
end sensor is exposing, it will not be able to respond to the new FrameTrigger signal, then the camera will
send a FrameStartOvertrigger event to the host. Note that if multiple FrameTrigger signals are received
within one frame acquisition period, the camera sends only one FrameStartOvertrigger event.
8.6.5. EventOverrun Event
Inside the camera, there has an event queue which is used for caching events. Usually, the event data
packet which is sent to the host only contains one event. When there are multiple events occur
simultaneously, or when the event transmission is delay, the user can use event queue inside the camera
to cache the events. When an event can be sent, the camera will send all the events cached in the queue,
at this time the event data packet which is sent to the host contains multiple events. But if the camera is
running in a high frame rate mode, and send several events that exceed the camera cache, at this time, if
the EventOverrun event is enable, the camera will send an EventOverrun event to the host, and discard
all the events in the current cache.
8.6.6. FrameBurstStartOvertrigger Event
When the camera is in FrameBurstStart trigger mode, when it receives an AcquisitionTrigger hardware
trigger or software trigger signal, if the front-end sensor is exposing, it will not be able to respond to the
new AcquisitionTrigger signal, and the camera will send a FrameBurstStartOvertrigger event to the host.
Note that the camera will send the corresponding number of FrameBurstStartOvertrigger events if it
receives multiple AcquisitionTrigger signals during the acquisition period of one frame of image.
8.6.7. FrameStartWait Event
When the camera is in FrameTrigger mode, the camera starts acquiring images, and if it does not receive
the FrameTrigger signal, the camera will send a FrameStartWait event to the host.
8.6.8. FrameBurstStartWait Event
When the camera is in the AcquisitionTrigger mode, the camera starts acquiring images. If the camera
does not receive the AcquisitionTrigger signal, the camera sends a FrameBurstStartWait event to the host.
Note that if the FrameTrigger mode is set to on simultaneously with the AcquisitionTrigger mode, the
FrameBurstStartWait event will be sent first. When the camera receives an AcquisitionTrigger signal, it will
send a FrameBurstStartWait event.
