– 55 –
A: Start bit
B: Data bit
C: Parity bit
D: Stop bit
A
B
C
D
b0
b1
b2
b3
b4
b5
b6 (b7)
13. RS-232C Serial Interface
13-1. Interface Specifications
1
Data transmission method:
Asynchronous serial interface
2
Baud rate:
Selectable from 4800, 9600, 19200, 38400 bps
(Refer to “11. DIP Switch Setting”.)
3
Word length
Start bit: 1 bit
Data bit: 7 or 8 bits (selectable.)
Parity bit: Odd, even or none (selectable.)
Stop bit: 1 bit length
4
Signal polarity
RS-232C
MARK: Logic “1” (–3 V to –15 V)
SPACE: Logic “0” (+3 V to +15 V)
MARK “1”
SPACE “0”
