What does Visa Read.vi do with a Zero Byte Count?

[Mark_Holm]

If I use the Bytes at Port property node to feed the Byte Count input of VISA Read.vi, and the value is zero, what happens?

Does VISA Read.vi return immediately with zero bytes?

Does VISA Read.vi return immediately with however many bytes might have shown up in the buffer in the meantime?

Does VISA Read.vi wait for bytes or termination character?

Does VISA Read.vi wait for timeout?

The documentation does not say, and I need to know.

Thanks.

[JÞB]

Retunrs 0 bytes immediatly and a warning that more data may be in the buffer

[Mark_Holm]

What is the number of the warning?

Thanks.

[crossrulz · Accepted solution]

Warning 1073676294 occurred at VISA Read in Untitled 1

Possible reason(s):

VISA:  (Hex 0x3FFF0006) The number of bytes transferred is equal to the requested input count. More data might be available.

[JÞB]

Nice cover Tim. thanks