Why doesn't VISA Read read all the available and commanded bytes

[diarmaede]

Hi All,

I am using VISA Write.vi and VISA Read.vi to send and receive byte packets to and from a processor.  Usually everything works fine.  I set a loop to repeat until it sees at least 20 bytes at the port, then I VISA Read to read 20 bytes.   However, when I receive certain byte packages, my property node shows 20 bytes at the port, I instruct VISA Read to read 20 bytes, but it only reads 13 bytes and leaves seven bytes at the port.  If I run the read operation again, it will read them remaining 13 bytes.

Any ideas as to what could be making this happen?

Thanks,

Forbes

[diarmaede]

Aha!  Any time VISA Read sees a "10" as the value for one of the bytes, it automatically stops reading at that point.  I'm guessing there is a property setting I can find to tell it not to do that.  Any help would be greatly appreciated.

Thanks,

Forbes

[diarmaede · Accepted solution]

OK, I figured it out.  I set "Enable Termination Character" in "VISA Configure Serial Port" to "False," and all my problems disappeared.

It's fun talking to myself.

Cheers,

Forbes

[smercurio_fc]

Glad we couldn't help.