User`s manual

BD2-1220/1221 User’s Manual
17
7. SERIAL INTERFACE
7.1 Specifications
(1) Synchronizing system:
Asynchronous
(2) Baud rate
4800, 9600, 19200, 38400bps (User selectable)
(3) Configuration of one word
Start bit: 1-bit
Data bits: 8-bits (fixed length)
Parity bit: Odd, even, or none (User selectable)
Stop bit: 1-bit or more
(4) Signal polarity
RS-232C
• Mark = Logic “1” (–3 V to –12 V)
• Space = Logic “0” (+3 V to +12 V)
(5) Received data (RD signal)
RS-232C
• Mark = 1
• Space = 0
(6) Reception control (DTR signal)
RS-232C
• Mark: Data transfer disabled
• Space: Data transfer enabled
(7) Transmission control (DSR signal)
RS-232C
• Mark: Data transfer disabled
• Space: Data transfer enabled
(8) Transmission control (TD signal)
DC1 code (11H)X-ON: Data reception enabled
DC3 code (13H)X-OFF: Data reception disabled