Testing your 485 Serial Port in 2 Wire (Half-Duplex) Mode in LabVIEW.

Publish Date: Sep 06, 2006 | 4 Ratings | 2.25 out of 5 | Print | Submit your review
This program is designed to test the functionality of a 485 Serial Port in two-wire (half-duplex) mode. To put your port in two-wire mode you must short the T+ line with the R+ line, and the T- line with the R- line. This is done by connecting pin 4 to pin 8, and pin 5 to pin 9. Do this for two ports. In order to verify that the ports are working, perform a "loopback" by connecting 4/8 on port 1 to 4/8 on port 2, and 5/9 on port 1 to 5/9 on port 2.

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