LabVIEW
Getting a parity error coming from VISA Read
NewMachine wrote:
> hello - i can't find "serial read" or "write". is this an example vi
> or something? thanks!
That are the old serial functions. They are only provided as
compatibility functions in LabVIEW 7, are not in the function palette as
they are in fact in LabVIEW 7 accessing VISA inside of them to, so using
VISA directly is more efficient and simpler in the long run.
As to your problem, I think your instrument my expect a certain command
termination such as carriage return and/or line feed. When you hit the
return key in HyperTerminal to send of the command, the program in fact
adds a carriage return and/or line feed to the end of the string it
sends out.
Some instruments sit there and wait for this terminati
on character
before they will even attempt to decode the command and send you an
answer back.
Make the string control or constant you use to define the command to
send to the instrument, to "'\' Codes Display" from the context menu,
then append '\r' and/or '\n' without the quotes to the end of that string.
Rolf Kalbermatter
> hello - i can't find "serial read" or "write". is this an example vi
> or something? thanks!
That are the old serial functions. They are only provided as
compatibility functions in LabVIEW 7, are not in the function palette as
they are in fact in LabVIEW 7 accessing VISA inside of them to, so using
VISA directly is more efficient and simpler in the long run.
As to your problem, I think your instrument my expect a certain command
termination such as carriage return and/or line feed. When you hit the
return key in HyperTerminal to send of the command, the program in fact
adds a carriage return and/or line feed to the end of the string it
sends out.
Some instruments sit there and wait for this terminati
on character
before they will even attempt to decode the command and send you an
answer back.
Make the string control or constant you use to define the command to
send to the instrument, to "'\' Codes Display" from the context menu,
then append '\r' and/or '\n' without the quotes to the end of that string.
Rolf Kalbermatter
