counter read buffer error 10800

[Meinhard Koyro]

Using PCI Counter/Timer Card 6602 with the Counter Read Buffer.vi,
the following problem occurs:

With high gate frequencies (1000 Hz), the number read (~995)
is always smaller than the gate frequency, and the warning 10800 appears.

There are no problems when using smaller gate frequencies (~100 Hz).
Counts to read is set to -1, time limit to -1.

How can I get the complete number of data?

Meinhard.

[Tiptop]

Hello,


This is an interesting problem. The gate frequency is affecting the number read? Let�s see if we can figure this out. If you could let me know the answers to the following questions, I bet we can get this solved.

1.) What version of NI-DAQ and LabVIEW are you using?
2.) Are you setting the Internal Buffer Size using the Counter Buffer (NI-TIO).vi? If so, what are you setting it to?
3.) Does the system work if you explicitly set the counts to read?
4.) As a general rule of thumb I would set the counts to read to be half of the buffer size. And the buffer size should be big enough to hold AT LEAST two tenths of a seconds worth of data. Does using these rules help?

Try these suggestions out and let me know. Also, have you tried using an examp
le program? Does it work? If not, where does it fail?

Best regards,

Justin T.
National Instruments