How are the COM Ports for My USB Serial Device Assigned?
I'm using an USB serial device like the USB-232. When I plug in my device, I always get the same COM ports assigned to it. If I plug in a second USB-232, it is assigned different ports, even if the first USB-232 is not still plugged in. Why does that happen? How are the ports assigned?
URL: http://digital.ni.com/public.nsf/allkb/B7AC81CD11B9243B862574FA005BCE03
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MAX Does Not Save or Apply VISA Port Settings
I configured my serial or parallel port settings and saved them in MAX, but these settings are not applied, and/or old settings are restored when MAX is restarted.
URL: http://digital.ni.com/public.nsf/allkb/8EBAEC8A57BB48BE862574F90072D3DD
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Unable to use NI USB Serial Ports after Installing NI-Serial
After upgrading or installing NI-Serial on a new system, I was unable to use the NI USB or ExpressCard serial ports attached to my computer. This hardware worked fine when a previous version of NI-Serial was installed on my system or when I use it with another computer. How can I get my ports
URL: http://digital.ni.com/public.nsf/allkb/099F2D2720D86E8586257479004B8A37
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Why Is My USB Serial Device Slower Than Other Serial Interfaces?
I have a USB serial interface, like the USB-RS232, and when I run code, it is significantly slower than running the same code on any other serial interface (like a built in serial port). Why is this happening?
URL: http://digital.ni.com/public.nsf/allkb/251A0AFC807ECFE2862573B4007ABA3B
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USB 232/4 Device Shuts Down
My USB 232/4 device works for a while and suddenly turns off and then back on after a couple of minutes. I have already checked the USB power settings in Device Manager to disable allowing to turn off device for power savings. I also verified that only one device is connected to one USB root
URL: http://digital.ni.com/public.nsf/allkb/9D3890BE49FF5D43862573A7006E5612
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Receiving Error when accessing properties of a Serial Device through a USB Serial Adapter
I’m using a third party serial device via a third party USB Serial adapter. I am able to configure and communicate with it under hyper-terminal. When testing the device in MAX, I am unable to change items such as the Baud Rate and Parity Bits. The error I receive is 0xBFFF0072.
URL: http://digital.ni.com/public.nsf/allkb/D42EB343B549A27A8625734400574D8A
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Differences between the PXI-8430/16 and the Legacy PXI-8420/16
I am evalutating the two sixteen port NI-Serial boards and have some questions about them. I noticed that the Legacy board is more expensive. Are there any other differences between the two boards?
URL: http://digital.ni.com/public.nsf/allkb/DCE3DEA4B0C8E6EB86257333006D91B2
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Measuring the Output of a Serial Port for Low Level Analysis
I'm using a serial device, and I'm unsure of the output of my serial port. Is there a way to view the signal that is being produced by the serial port in the lowest level possible.
URL: http://digital.ni.com/public.nsf/allkb/79B995C3638F4177862572C900593631
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Pinout For Serial Ports
What is the pinout for my serial port? What pins do I need to connect for a loop back test?
URL: http://digital.ni.com/public.nsf/allkb/B9A38929D546B796862572C7005F0644
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串行端口的引脚定义
串口的引脚定义是怎样的? 用于loop back测试时需要连接哪些引脚?
URL: http://digital.ni.com/public.nsf/allkb/B5FBBDC023E1CFB1862573C7004E7877
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