Can not send command via VISA test panel in MAX

Hello all,
I am having a small issue using the VISA test panel in MAX. I am trying to send a simple command to a device and then retrieve the response data. I am able to do this successfully via Labview, but for whatever reason I can not get a good response in MAX. The command that I am sending is simply a letter (address of the device) followed by an end of line character (\r\n in ascii). In MAX, I simply append the \r\n onto the string sent in the buffer (Send End on Writes == FALSE). All serial settings are the same as what I have in LV (19.2, 8-n-1). Does anyone have any thoughts? This is kind of frustrating as I just want to do something simple and don't want to have to build a whole routine in LV to do this.
Cheers, Matt
Matt Richardson
Certified LabVIEW Developer
MSR Consulting, LLC
Solved!
Go to Solution.

Thanks, Broken. I am getting a time out error. Clearing the buffers doesn't seem to be making a difference. This is baffling to me. I must be missing something fundamental.
Something that I didn't add before is that I seem to be able to send the command via labview without a read, and then read it via MAX. This must have something to do with way it is sending the command. Arrrrgh!
Matt
Matt Richardson
Certified LabVIEW Developer
MSR Consulting, LLC

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SysB1 wrote:
Hi, I have an instrument which has a usb connection. When I connect it to a Windows 7 PC, it automatically picks up the driver and shows up as a "USB Serial Port (COM7) (Manufacturer is FTDI).
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However, the VI (which just sends a VISA command "*IDN?") gives me a time out error (0XBFF0015) or a device/resource not present error ( 0XBFFF0011). Attached is a screenshot of the VI.
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Can not send command via VISA test panel in MAX

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