visa resource name as avariable

Dear All

I have a program with different VIs. I want to configure the VISA Serial port only one time and use this configuration where ever I want. How do I do this.

Now i have to configure the VISA parameters (such as: Bouad rate, VISA resource name, Parity, ...) every time i want to read or wirte a variable on serial port.

is there somthing like a global variable which i can save the configuration on that and use it when ever i want in different Sub VIs?

Thanks in Advance