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Serial Baud Rates Supported By NI-VISA

Primary Software: Driver Software>>NI-VISA
Primary Software Version: 3.5
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem:
Which baud rates are valid when using NI-VISA for serial communication?

Solution:
NI-VISA itself does not limit the range of baud rates you can use. Instead, the baud rate request passes directly to the device driver for the serial interface. NI-VISA returns a success if the driver supports the desired baud rate.

Most serial devices accept only a predefined set of baud rates. The maximum rate for most standard serial ports is 115200. However, some serial devices, such as the NI PCI/PXI-843x product line, support any arbitrary baud rate below a specified maximum rate.

If you use NI-VISA in Linux or Mac OS, you usually are limited to the standard baud rates specified in this document. The standard driver on these operating systems does not support arbitrary baud rates.

Standard baud rates supported by most serial ports:
	110	300
	600	1200
	2400	4800
	9600	14400
	19200	28800
	38400	56000
	57600	115200

Standard baud rates supported by some serial ports:
	128000	153600
	230400	256000
	460800	921600

Related Links:
KnowledgeBase 1BEAMPL1: Can VI_ATTR_ASRL_BAUD be Used with a Non-Standard BAUD Rate?
Drivers and Updates: Current Versions of NI-VISA

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Report Date: 01/27/1999
Last Updated: 05/06/2008
Document ID: Q9K92I

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