What is the Maximum Number of Serial COM Ports I Can Have on My Computer?Primary Software: Driver Software>>NI-VISAPrimary Software Version: 3.3 Primary Software Fixed Version: N/A Secondary Software: N/A Hardware: Serial>>RS-232, Serial>>RS-485
Problem: What is the maximum number of COM ports I can have on my computer using National Instruments Serial Products? Solution: The maximum number of COM ports is dependent both on the operating system (OS) and the serial driver. The maximum number of serial ports that NI-VISA currently supports on any platform is 256. On Windows 95, 98, 2000, and XP, the OS also limits the number of COM ports to 256. On Windows NT, our serial driver limits the number of COM ports to 99. For the serial ENET products on Windows NT and 2000, the driver limits the number of COM ports to 256. More information on the COM port limit, as well as information regarding the default numbering of serial ports can be found under "Serial Port Support" in the NI-VISA help linked below. Related Links: Product Reference: NI-VISA Help Attachments:
Report Date: 05/05/2000 Last Updated: 10/07/2005 Document ID: 1X4DJQUE |
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