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Instrument Control (GPIB, Serial, VISA, IVI)

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serial read and write

hiiiiiiiii ......... i have to run 3 hardware simultaneously......... with the help of visa i am able to implement programe for one hardware . By using rs232  interfacing is done between pc and hardware..... now plz suggest me how i am able to run 3 hardware.......  by using some extention on com it become possible or i have to deign some another hardware for that........plz help me and thanks
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RS-232 is intended for point-to-point communications -> unless your PC has 3 serial ports (which I doubt) you should choose a different BUS (such as GPIB or ethernet).

Regards

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...or use a RS232 interface with several ports. For example from NI

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You could also use 9 pin rs232 to USB converters.

 

Curt

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