setting the parameters of serial port VISA does not persist

When I set the baud rate using the VISA's Interactive Control Panel for a serial port specific (ASRL) and then close the window for ASRL, baud rate goes back to the default value.  Why doesn't baud rate?

Also when I change the port settings for a particular serial port (COM) on the side of Windows, why can't I see these same port settings when I look at them from the interactive panel of VISA?

Also, when I set by programming the output baud rate for a particular ASRL (code C), why is it reset by default when I re - run my program and do a get on baud rate?

Some information:

My C program works on an industrial PC which has a PXI MXI connected to it expansion chassis.  Series 3 cards in the expansion chassis.

When you close the VISA session and/or close your application, port settings in the system default values.  It is a very normal behavior.  As long as you keep your open VISA session, the port will behave how you already told (set Baud Rate, etc.).

Tags: NI Hardware

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