Black Box RS422/485 Manual

A SERVICE OF

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27

Because each bit in asynchronous communication is sent consecutively, it is easy to

generalize asynchronous communication by stating that each character is wrapped

(framed) by pre-defined bits to mark the beginning and end of the serial

transmission of the character. The data rate and communication parameters for

asynchronous communication have to be the same at both the transmitting and

receiving ends. The communication parameters are baud rate, parity, number of

data bits per character, and stop bits (usually listed in that order, like this:

9600,N,8,1).

APPENDIX C: Asynchronous Communication