Hi and many thanks for the answer
Baudrate is both 9600, stop bit both 1
Quote:
Originally Posted by Rod3775
Another possibility is reversed differential signals. RS422 is a balanced voltage system, and if your embedded system drives the lines in the opposite sense than your USB converter, you would get garbage.
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That looks like a very good guess. Just got the RS422 pin configuration from the embedded board:
Embedded board RS422 D-Sub9:
Pin 1: TX-
Pin 2: TX+
Pin 3: Rx+
Pin 4: Rx-
Pin 5: GND
USB-to-RS422 converter RS422 D-Sub9::
Pin 1: TX+
Pin 2: TX-
Pin 3: Rx+
Pin 4: Rx-
Pin 5: GND
So TX seems to be reversed.
I gone make a new wire, test and report....