Visa read function byte count is N-1?

[Sangkyu]

Hi,

I make Visa Vi.

The data is received 17bytes every 2ms second.

When third Visa read function byte count is 15, data is lose.

But, third Visa read function byte count is 14, data received well.....

So, Visa read function byte count is N-1?

[deceased · Accepted solution]

"Visa Read (serial)" reads X bytes from the buffer.

If you have 17 bytes in the buffer and you make 2 reads of 1 byte, there should be 15 remaining.

If there is not, perhaps you are not waiting long enough for the data to be received into the buffer and you are trying to read out more bytes than it has available at that moment.

Deceased

[crossrulz · Accepted solution]

What do you mean by "data is lost"?  Do you get a timeout error (after 10 seconds)?  Are you sure the message is not 16 bytes?

As a side note, you do not need to wire up constants to the Index Array.  The first item is index 0 by default and just increments from there.  Save you some wiring.