6.SERIAL INTERFACE
6.1Specifications
(1)Synchronization: Asynchronous
(2)Baud rate
1200, 2400, 4800, 9600, 19200 Baud/sec (User selection)
(3)Word configuration
•Start bit: 1 bit
•Data bit: 7 bits or 8 bits (User selection)
•Parity bit: odd, even, no parity (User selection)
•Stop bit: 1 bit or more
(4)Signal polarity
•Mark = Logic “1” (−3 V to −12V)
•Space = Logic “0” (+3 V to +12 V)
Selecting presence or absence of signal is available with TTL (RESET) DIP switch No. 3.
•H level = Logic “1”
•L level = Logic “0”
(5)Receive data (RD)
•Mark: “1”
•Space: “0”
(6)Transmit data (TD)
•Mark: “1”
•Space: “0”
(7)Received control data (DTR) (DTR signal)
•Mark: Data transmission not possible
•Space: Data transmission possible
— 26 —