Baumer VisiLine, Руководство пользователя

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11. Start-Stop-Behaviour
Start / Stop / Abort 11.1 Acquisition (Camera)
Once the image acquisition is started, three steps are processed within the camera:
Determination of the current set of image parameters ▪
▪ Exposure of the sensor
Readout of the sensor. ▪
Afterwards a repetition of this process takes place until the camera is stopped.
Stopping the acquisition means that the process mentioned above is aborted. If the stop
signal occurs within a readout, the current readout will be finished before stopping the
camera. If the stop signal arrives within an exposure, this will be aborted.
Abort Acquisition
The acquisition abort represents a special case of stopping the current acquisition.
When an exposure is running, the exposure is aborted immediately and the image is not
read out.
Start / Stop 11.2 Interface
Without starting the interface, transmission of image data from the camera to the PC will
not proceed. If the image acquisition is started before the interface is activated, the re-
corded images are lost.
If the interface is stopped during a transmission, this is aborted immediately.
11.3 Acquisition Modes
In general, three acquisition modes are available for the cameras in the Baumer VisiLine
IP series.
Free Running 11.3.1
Free running means the camera records images continuously without external events.
11.3.2 Trigger
The basic idea behind the trigger mode is the synchronization of cameras with machine
cycles. Trigger mode means that image recording is not continuous, but triggered by
external events.
This feature is described in chapter 4.6. Process Interface.
11.3.3 Sequencer
A sequencer is used for the automated control of series of images, using different settings
for exposure time and gain.