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Operational Reference
Linea Lite GigE Series Camera
Acquisition Buffering
Acquisitions are internally buffered then transferred to the host system. This internal buffer allows
uninterrupted acquisitions without transfer delays. When the internal buffer is full an Image Lost
Event will be generated.
The camera has 1 block of 256MB. A portion of the memory could be reserved for packet resends
but at the loss of accumulating frames.
Using Transfer Queue Current Block Count with CamExpert
This feature returns the number of frames buffered within the camera pending transfer to the host
system. Image lines / frames are buffered in cases where the host system is experiencing high
network traffic with other devices through the same Ethernet switch.
Note
: By buffering image frames, the camera will not drop data when there are
temporary delays to the transfer.
When using CamExpert, right click on this parameter and then click on Refresh from the pop-up
menu. The current frame count in the transfer buffer is displayed in the Value field. During live
grab, if the number of frames in the transfer buffer is increasing, then there is a problem with the
network or host bandwidth being exceeded. Review the
then contact
for help in reviewing your camera setup.
Note
: The ImageLost event occurs when all buffer space is consumed.
Overview of Transfer Control (
TransferControlMode
)
Linea Lite GigE acquisition transfers operate either in the basic coupled mode or in an independent
decoupled user controlled mode, as described below.
TransferControlMode =
Basic
Basic Transfer Mode provides maximum compatibility with any control application running on the
host computer. The host-based acquisition program commands the camera to do a frame grab and
send it through the camera’s frame buffer to the camera’s transfer m
odule and the host. The
acquisition rate is limited by the host transfer rate.
FB 1
FB 2
FB 3
FB 4
FB 5
FB 6
FB n
Acquisition
:
Write
Index
Camera
Read
Index
Circular Frame Buffer
Transfer
Host
Computer
Transfer
Module
Camera Transfer
Module
Preliminary