Re: Error -1073807246 when trying to control a circulator in Labview via RS-232

[Brian Powell]

I wonder if the timeout on Write is because the handshaking isn't
working.  Suppose the device isn't handshaking the same way, or your
cable is bad.  In that case, Write may just give up.

Brian

Re: Error -1073807246 when trying to control a circulator in Labview via RS-232

[jcrooke]

Determine wheter or not you have a straight through serial cable or a
null modem cable.  If it is null modem, your device will probably not
properly receive the commands because it will be listening to the
wrong wires in the cable.

Re: Error -1073807246 when trying to control a circulator in Labview via RS-232

[hung]

thanks for the notes jcrooke but unfortunately I have version 6 of
Labview so I can't open the file.  Can you save it as an older
version? :)

Re: Error -1073807246 when trying to control a circulator in Labview via RS-232

[jcrooke]

I work on an Apple machine, so the answer is no, but I will see if I
can find a Windows machine with 6.1.

Re: Error -1073807246 when trying to control a circulator in Labview via RS-232

[hung]

The timeout value was just set at the default.  How do you know how
long your stream of data is?
The purpose of my application is to input a setpoint temperature to
the refrigerator/heating circulator and also read what temperature the
circulator is actually at.  The circulator recognizes certain commands
that is inputted from the computer.  For example, to set the setpoint
temperature to 25 deg C, the command is: out_sp_00 25.0 return
So I have set up out_sp_00  as a string constant and the setpoint
temp is inputted through a string control.  Also, I used a carriage
return. All of these are then concatonated together.  So what would
the size of this data stream be considered as? Do I even have the
right idea of inputting this command or have I done things the
long/wrong way?

Thanks for the heads up if a timeout occured when reading

Error -1073807246 when trying to control a circulator in Labview via RS-232

[hung]

Hi, I'm trying to control an F32 refrigeration/heating circulator
through LabView via an RS-232 cable but am having trouble.  I keep
getting the error - 1073807246 at property node (arg1) in VISA
configure serial port.  What does this error mean and how can I
correct it?  I have already specified the values for Baudrate (4800),
parity (even), handshake (RTS/CTS), data bits (7), and stop bit (1).

Thank you,
Hung