LABWINDOWS RS-232 DRIVER

Thank you for link. The instrument needs to send data to the computer as soon as the data is acquired. August Part Number: You can set parameters such as baud rate, data bits, parity, stop bits and flow control through the COM port configuration of the operating system. The portNumber 1, for example, may not necessarily map to COM1. Most Active Software Boards: Windows Transmission is in a suspended state because an XOFF character was received from the remote device.

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LabWindows/CVI

Because you do not want to tie up computer resources waiting for ComRd to complete, and you do not want to make the serial input buffer extremely large, you must be notified of when data is present at the port. OpenCom uses bytes of the buffer for the input rs2-32 and bytes for the output.

The portNumber 1, for example, may not necessarily map to COM1. Message 3 of 9. August Part Number: Several rx-232 can indicate the presence of more than one condition. This is something you should know.

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The count specifies the number of bytes to write. Thanks for the quick response.

Solved: Simple Serial Communication using RS – Discussion Forums – National Instruments

Most Active Software Boards: You can set parameters such as baud rate, data bits, parity, stop bits and flow control through the COM port configuration of the operating system. This code is a negative value that specifies the type of error that occurred. Windows and RT Overrun error detected; a character was received before the receiver data register was emptied.

Thank you for link. Most of the time 0 means success, and negative values mean error. However, the Windows serial driver might use a different number for the actual queue size. Use the CloseCom function to release rd-232 resources used by your serial port session.

GetComStat – LabWindows/CVI Help – National Instruments

Or have I problem? Status fields give you information about whether the function call performed successfully. Message 6 of 9.

The portNumber 1, for example, may not necessarily map to COM1. Message 4 of 9.

GetComStat

You expect that value to be equal to the number of bytes you want to send for your application. I have been doing some research on how to read and write using the serial port with RS It sounds as if you’re looking for an example that can help you scan a com port.

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The following table shows the hexadecimal value of the bit and its corresponding description: I hope this helps and good luck on your project! Labdindows not forget to examine the function help for each of them and handle the error conditions appropriately.

The most important functions are the open, close, read, and write. Also you could look to www. Download Help Windows Only.

I’m novice in LabWindows. August Part Number: Message 5 of 9. You changed your response to Helpful. A number that indicates the COM port on which to operate.