Dalsa Linea2 5GigE, Руководство пользователя

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154 • Troubleshooting Linea2 5GigE Series Camera
Acquisition Error without Timeout Messages
Streaming video problems range from total loss of image data to occasional loss of random video
data packets. The following section describes conditions identified by Teledyne DALSA engineering
while working with GigE Vision cameras in various computers and setups. For information on
network optimization refer to Teledyne DALSA
’s Network Optimization Guide (available through the
Start menu under Teledyne DALSA ).
No camera exposure when expected
• Verify by using the camera in free-running mode. Do not use external trigger mode when
testing a camera setup.
• If using free-running mode, verify that the exposure period is set to the maximum possible for
the set frame rate.
• Load factory default from the Power-up Configuration in CamExpert. This will reset the camera
to its nominal acquisition rate.
Camera is functional but frame rate is lower than expected
• Verify Ethernet link speed. If the LAN connection is limited to 100 Mbps, the line rate maximum
will be limited once the internal buffers are filled. Refer to Teledyne DALSA
’s Network Imaging
manual for information on network optimization.
• If using an external trigger, verify the trigger source rate and camera parameters such as
trigger to exposure delay.
Camera acquisition is good but frame rate is lower than expected
• While running CamExpert and grabbing in free-run mode at the maximum frame rate, start the
Sapera Monitor tool installed with Sapera (on Windows Start menu, select Teledyne DALSA
Sapera LT > Sapera Monitor ).
• Make sure the Memory Overflow event monitor is enabled.
• Continue grabbing at maximum frame rate. If any memory overflow events are counted, the
internal buffer could not be transmitted on time and was discarded. Such a condition may occur
at high frame rate cameras.
Note: Sapera CamExpert tool limits the maximum frame rate possible due to
CamExpert generating an interrupt for each acquired frame. The Sapera Grab Demo
may be better suited for testing at higher frame rates.
• Verify network parameters are optimal as described in Teledyne DALSA’s Network Imaging
Package for Sapera LT Optimization Guide. Ensure the host computer is not executing other
network intensive tasks. Try a different Gigabit NIC.
Note: Changed acquisition frame rate requires the acquisition to be stopped; when
acquisition is restarted the new frame rate is applied.
Camera is functional, line rate is as expected, but image is black
• Verify that the lens iris is open.
• Aim the Linea2 5GigE at a bright light source.
• Check the programmed exposure duration is not too short or set it to maximum. Refer to
Sensor Control Category for relevant features.
• Using CamExpert set the Linea2 5GigE to output its Internal Pattern Generator. This step is
typically done for any camera installation to quickly verify the Linea2 5GigE and its software