Which IMAQ card are you using? There are two types of memory architectures used for National Instruments IMAQ boards; either a 4KB FIFO (First In First Out) buffer, or a minimum of 16 MB of onboard memory. To my knowledge, none of our current boards have 8MB of onboard memory. Please refer to the following knowledge base on our website that describes the onboard memory of our image acquisition cards in more detail,
Knowledge Base 2IAABM8M: What Are the Onboard Memory Requirements for Images on the NI-IMAQ Boards?Also, can you please provide more detail about how you determined that the card does not recognize its onboard memory? It may be that your image acquisi
tion is exceeding the onboard memory of the board. For example, with an 8-bit 640x480 image, you could fit about 50 buffers in a 16 MB onboard memory.
I would also recommend that you run the diagnostic utility for the card and make sure that it passes all the tests. If the card fails the diagnostics, then you will need to contact National Instruments to have the card repaired.
Best wishes,
D. Putnam
Applications Engineer
National Instruments