Three devices with one computer

[Oesen]

Hello everyone. Can i make a labview program with three scales ?. They must all be connected with a serial port connection.

[danil33]

Hi oesen,

                 Can you explain your question more clearly?

[Petric]

Yep more details would been nice. But when your PC has 3 serial ports you can communicate over all of them:-)

[Oesen]

Yes off course.. I have to make a program, which lets my PC communicate with three devices at the same time. Is this possible even though all three scales are communicated with a serial port ?. As far as i know, serial port connection can only communicate with ONE device, and not MORE device at the same time ?

[danil33]

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Oesen wrote:

serial port connection can only communicate with ONE device, and not MORE device at the same time

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Not One device, The serial port sends and receives bytes of information one bit at a time.Based on the number of ports available in your system you can communicate with any of the devices.

[dan_u]

Yes, you will need 3 serial ports, each one connected to one device.

If your PC does not have 3 ports you have several options:

- use a PCIe card with additional serial ports

- use USB to serial adapters

- there's also a box from NI which converts one USB into 4 serial ports