warning I don't understand

[ju]

Hello,

I received this warning message, but I don't understand it. Can anyone tell me what's it about?


Warning 1073676294 occurred at VISA Read in SERIAL.vi->testrs232.vi.

Possible reasons:

VISA: (Hex 0x3FFF0006) The number of bytes transferred is equal to the input count.


Thank you, merci, gracias, danke schön

Julien

[LV_Pro]

This is a status report, not an error.
See:
http://digital.ni.com/public.nsf/allkb/C96C84C922DC3F978625632500482F78


Have fun,

Putnam Monroe
Certified LabVIEW Developer

[TiTou]

Hi Julien,

The same thing happened to me and after a while I realize that I was not always sending the termination character (cariage return in my case) at the end of my strings.
Make sure you configure the COM port properly (read the device's documentation) and be sure to send the correct ending char every time you send a string to the device.

Message Edité par TiTou le 03-21-2006 01:35 PM

[Dennis_Knutson]

This warning has nothing to do with sending a termination character. It has to do with not receiving one. If you configure VISA to disable receipt of the termination character and just specify a certain number of bytes to read, you get the warning that more bytes might be available. In serial communication, if the instrument does not send a termination character, you will always get this warning and can usually just ignore it. If you get this warning with a GPIB instrument, it should not be ignored because every GPIB instrument should send a termination character (EOI) at the end of the string and the warning indicates that the number of bytes requested was not large enough.