Digitaliocontrol - Dahua 3000 Series User Manual

Parameter
ExposureMode
ExposureTime
ExposureAuto
ResultingframeRateAbs
5.4

DigitalIOControl

In this property, you can control different I/O input or output signals, as shown in Figure 5-4; please
refer to Sheet 5-5 for detailed parameter settings.
Explanation
it will be abnormal and needs to stop the frame capture and restart
to return to normal.
Exposure mode: supports Timed mode and TriggerWidth mode.
 Timed: exposure time is set in ExposureTime.
 TriggerWidth: exposure time is the external trigger pulse
width.
Some models do not support TriggerWidth mode.
Exposure time.
Exposure automatically.
 Off means the function is disabled. You can set exposure time
in ExposureTime with a range of 0us～1000000us.
 Once means the camera can modify the exposure time once
according to the ambient brightness. The modified value is
displayed in gray in ExposureTime.
 Continue means the camera can continuously modify the
exposure time according to the ambient brightness. The
modified value is displayed in gray in ExposureTime.
The max frame rate the camera can achieve.
The max frame rate the camera can achieve depends on the
network transmission bandwidth, pixel size, resolution and
exposure time. The camera default exposure time takes precedence,
which means that when the exposure time is greater than the
reciprocal of the frame rate, the frame rate is preferentially reduced
instead of limiting the max exposure time.
Main Function Description
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