Yokogawa DR240 - Manual (Page 18)

2-8 IM DR231-11E
2.5 Communication Data Format
The RS-232-C interface uses a START-STOP communication format. With this format, a START
bit is placed at the beginning of each character transmitted, followed by the data bits, parity bit, and
stop bit, in that order. (See the figure below.)
Data bits
(7-8 bits)
1 character
STOP bit
1
1 or 2
2
Parity bit(Odd,
even, or none)
START bit
‘Line idle’
condition
Return to ‘line idle’ condition
(dotted line), or proceed to
next data START bit.