This video discusses the differences between three common serial interface standards: RS--232, RS--422, and RS--485; and the appropriate application usage for each.
Sure! Thanks for watching. Check first that the bus voltages are switching with an oscilloscope. The differential lines (A and B) should always be complementary during active data transmission. If the signal levels are changing, then use a protocol analyzer (if the protocol is a standard) to check that the message format is correct. Let us know if you have any other questions. You can also get technical help on TI's E2E network support forums on our website.
Maybe it's crystal clear to you, but one would need some prerequisite knowledge to fully grasp topics of this video. Plus it's not expected of anybody to learn interface standards in 4 minutes.
it provides good knowledge,,but i have a question,if a controller or device connected to RS422 not responding then hoe to chek it,or how to check the cable? with protocol analyzer and ohm meter or volt meter...thnx.
