Max 9.2.2 doesn't recongize com ports

Max 9.2.2 doesn't recongize com ports.
Dell Precision 360
Windows XP
Two different computes, multiple attempts, downloads of software - same result: com ports don't show up.

Hi Test Engineering Leader,
It may help to clarify some of the different software components at work just to make sure you have to the ones appropriate for your application. MAX is an explorer that allows access to hardware devices using different drivers. DAQmx is one of the drivers, but it does not typically manage COM serial ports (it looks like DAQmx 8.6.1 does support one device over a serial interface, but this is an odd exception and using the serial port through this driver may be unpredictable). COM serial ports are supported in NI-VISA, which allows generic serial port handling and is a commonly used to build instrument drivers. There are other kinds of device drivers, like the 488.2 for GPIB devices, or NI Motion for cameras. You can check out the different Read-Mes to check out whether your device is support.
If you are trying to directly access the serial ports on your computer, then you should use NI VISA. If there is a particular device you are trying to communicate with, then it should be listed in the Read Me if the driver can operate it correctly.
So, just to verify, you have already installed the latest version of NI VISA? If so, then you should be able to open MAX and see an option called Serial & Parallel. If this is not listed, then check the device is probably missing from the OS: trying viewing it in the device manager. If it is missing in the device driver and you know it's there, try installing new hardware.
- Regards,
Beutlich

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It should not be possible that HyperTerminal sees a COM port but VISA does not. Does anyone know why or have any ideas?
Here's some more info: I wrote a LabView (LV) program and deployed it (via the Application Builder) to some of our production department's PCs (some Windows XP and some Windows 7). We use it to set up products we design and manufacture through our device's USB serial port. The USB port is actually a virtual COM port (VCP) - a USB to Serial converter or "bridge". We have a custom driver for our device and since each device's USB bridge chip is programmed with a different serial number, every time we connect a new device to the PC the installer runs and assigns a new COM port number. This is so our customers can use multiple devices on a PC. Fine. On one of our production PC's we were close to COM900 ports (HyperTerminal sees only up to COM256) when suddenly Win7 would not allow any more. We were able to uninstall orphaned (non-present) COM ports from DeviceManager ("DM") by starting it from a command console (DOS window) with a special command-line switch, "set devmgr_show_nonpresent_devices=1" then "start devmgmt.msc" (I have this in a batch file). In DM View menu you can "Show hidden devices" and uninstall them as if they were connected. I've also tried uninstalling them the normal way when the device was actually connected. Either way, sometimes, not always, depending on the COM port number, after reusing that port number by installing a new device which picks up that old, freed-up number, LV VISA doesn't see it. In other words, when "Refresh" is clicked in the COM port VISA list box, any new devices installed should be and normally are seen. (Refresh is not needed if the application is started after the device's driver is installed. It is only need if the LV application is open with the new device is added.) However, HyperTerminal does see it and lists it in the Properties screen, the "Connect using..." list box. And the port works with HyperTerminal. (Of course we've tried rebooting after uninstalling and/or reinstalling the device, with the same results.)
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I can't see how it has anything to do with the Silicon Labs driver. I might have to delete ALL of MY devices, then uninstall the driver files, reboot, then reinstall, as you suggested with the SiLabs driver. However, I don't see how VISA will now see these changes. VISA must have it's own database. That's what I thought deleting the ports in MAX would clear out, like a fresh install, but apparently not.
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Problem with NI VISA and Agilent VISA
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rsmrostov wrote:
‎You wrote that you have a USB-to-Ethernet adapter. Did you mean the TRIPP-LITE extender?
yes
That is simply a USB extender, no conversion to Ethernet. - obviously
Then why did you describe it as a USB-to-ethernet adapter?
rsmrostov wrote:
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Hi Everyone,
I have virtual com port equipment (hardware) from STmicroelectronics and i need to communicate it with LabVIEW through USB.
I have done with NI-VISA Wizard which i have gone through previous posts but am not able to communicate.
Can i get any drivers for this communication.
In MAX, i can see it as COM4, COM5 like that but i want it as USB.
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Sony.
'' A professional is someone who can do his best work when he doesn't feel like it''...........

To expand on Sir Dennis' point, it is not uncommon for vendors with USB widgets to sell to implement the interface to them as virtual serial ports, and the reason is simple: Nearly any environment can talk to a serial port, and you don't need any special hardware. In addition, because it is a **virtuall** serial port you don't even have to worry about cables.
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I have a RS485 line going into COM5 of my PC. Using HyperTerminal, I can talk to my serial device. However, there are problems with LabVIEW VISA functions. I can open the connection. I/O errors were given when I try to read or write. Is this because LabVIEW does not support RS485? What can cause the I/O error? Thanks.

Some tips,
First off, computer com ports are only RS-232. Make sure you are using the RS-232 port on the
ADAM-4570. Do you have to configure this port as RS-232 with Advantech software? If the ADAM is
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If HyperTerminal can talk to the ADAM, then everything is configured properly for a LabVIEW app. Be
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c commands you used with HyperTerminal.
"sy" wrote in message news:[email protected]..
> Good question. In fact, I think the problem stems from how COM5 is
> mapped to my PC. As for the second question, I got the same I/O error
> when using MAX. I believe that there is a conflict between NI
> software and the software I use to map the RS485 line to COM5.
>
> I am using Advantech's ADAM 4570 module to convert a RS485 line to
> ethernet. The ethernet cable goes into the PC. A software utility is
> used to map the ethernet connection to COM5. It is conflict between
> this utility and NI. Any idea on how to resolve the conflict? Thank
> you.

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Max 9.2.2 doesn't recongize com ports

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