Dalsa X64 Xcelera-HS PX8 User Manual
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X64 Xcelera-HS PX8 User's Manual Troubleshooting Problems • 29Memory Requirements with Area Scan AcquisitionsThe X64 Xcelera-HS PX8 allocates by default two frame buffers in onboard memory, each equal insize to the acquisition frame buffer. This double buffering memory allocation is automatic at thedriver level. The X64 Xcelera-HS PX8 driver uses two buffers to ensure that the acquired videoframe is complete and not corrupted in cases where the image transfer to host system memorymay be interrupted and delayed by other host system processes. That is, the image acquisition toone frame buffer is not interrupted by any delays in transfer of the other frame buffer (whichcontains the previously acquired video frame) to system memory.The total size of the two internal frame buffers must be somewhat smaller than the total onboardmemory due to memory overhead required for image transfer management. When the X64Xcelera-HS PX8 does not have enough onboard memory for two frame buffers, the driver memorymanager will reduce the size in increments of video lines for the 2 buffers, to the maximum thatcan fit.Note that in this situation, it is best to specify a single on-board buffer in order to increase the sizeof image that can be buffered on-board before a video line wraparound occurs during theacquisition. In this specific situation the image transfers to the host memory buffer can not takeadvantage of a dual on-board buffer during image transfer, therefore the image transfer is subjectto PCIe bandwidth limitations.Symptoms: CamExpert Detects no Boards• When starting CamExpert, if no Teledyne DALSA board is detected, CamExpert will start inoffline mode. There is no error message and CamExpert is functional for creating ormodifying a camera configuration file. If CamExpert should have detected the installedboard, troubleshoot the installation problem as described below.Troubleshooting ProcedureWhen CamExpert detects no installed Teledyne DALSA board, there could be a hardware problem,a PnP problem, a PCI problem, a kernel driver problem, or a software installation problem.• Make certain that the card is properly seated in PCIe slot.• Perform all installation checks described in this section before contacting Technical Support.• Try the board in a different PCIe slot if available.Symptoms: X64 Xcelera-HS PX8 Does Not GrabYou are able to start Sapera CamExpert but you do not see an image and the frame rate displayedis 0.• Verify power is connected to the camera.• Verify the camera and timing parameters with the camera in free run mode.• Verify you can grab with the camera in free run mode.• Make certain that you provide an external trigger if the camera configuration file requiresone. Use the software trigger feature of CamExpert if you do not have a trigger source.• Make certain that the camera is properly connected to the cable.• Make certain that the camera is configured for the proper mode of operation. This mustmatch the camera configuration file. Refer to your camera datasheet.• Try to snap one frame instead of continuous grab.• Perform all installation checks described in this section before contacting Technical Support.• Use the Sapera Monitor tool to see which events (if any) are generated by the board. |
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