WinXP,Labview6.1,PCI-6052 board,collect data from all 16 channels every 5 seconds
(Test 1)
I set external scan clock 10KHz, external channel clock 200KHz, buffersize 10K, "number of scan to read" 10K, theorically, in each file I should have 50,000x16 data. But my result is not right: every 5 seconds I got a file, but in side those files, the data is either 3000x16 or 2000 x16 alternatively. For example:
File1 is 3000x16
File2 is 2000x16
File3 is 3000x16
File4 is 2000x16
File5 is 3000x16
File6 is 2000x16
During the simulation, I see some change in the "scan backlog", but the number is not accumulated, for example, the numbers appeared are,36,0,0,..89,0. No error during the simulation. But when I stop the program I got the error: AI read is not enough fast for the data acquisition...
(Test 2)
When I set external scan clock 5KHz, external channel clock 100KHz, buffersize 5K, "number of scan to read" 5K, my result is right: I got a file every 5 second, and in each file therea are 25,000x16.
Why some data missing in the test one? The PCI6052 board clock is 333KHZ, so my setting of external scan clock and channel clock should be ok. The number of scan to read is set to as the scan rate, so I got accurately one second tiem. Is there something related with the board buffer size and setting or computer is not faster enough?
Thanks very much for help