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How To Test A 49-1 Unum4/19/2021
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Test A 49-1 Unum Serial Communication ByA loopback test can verify the operation of serial communication by sending and receiving data from the same serial port.Test A 49-1 Unum Software Generating TheIt can show problems in the serial port, the cable, or the software generating the messages without having to connect to third-party hardware. Loopback tests can be used for RS-232, RS-422, and RS-485 serial communication. Identify what serial communication protocol you are using (RS-232 vs. For more details on NI serial hardware pinouts, refer to the Serial Quick Reference Guide. The positive connections are indicated in red and the negative connections are indicated in blue. From port 1 to port 2, wire the shorted positive signals together, and the shorted negative signals together. Select the communications port of interest under Devices and Interfaces. If you are unable to see the port, refer to Serial COM Ports Missing in MAX or LabVIEW. Make sure the proper settings are selected and select Validate. For more information on serial settings, refer to the Help topic. Make sure not to have VISA Test Panels and LabVIEW simultaneously open, or VISA will throw an access resource error (error code -1073807246 hex:0xbfff0072). In the Basic IO tab, select Query to send the default IDNn command. The display window will then outline the write and read operations. The Test Panel should successfully read the sent IDNn command. Specify the transceiver mode based on the one you want to use. Run the VI. The Respond indicator should display the IDNn command.
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