Operating instructions

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7. SERIAL INTERFACE
7.1 Specifications
(1) Synchronous system : Asynchronous
(2) Baud rate : 1,200, 2,400, 4,800, 9,600, 19,200 bps (Selected by the
user)
(3) 1-word configuration
Start bits : 1 bit
Data bits : 8 bits or 7 bits (Setting upon shipment)
Parity bits : Odd, even, or no parity (Selected by the user)
Stop bits : 1 bit or more
(4) Signal polarity
RS-232C
• Mark = Logic "1" (–3 ~ –12 V)
• Space = Logic "0" (+3 ~ +12 V)
(5) Received data (RXD signal)
• Mark = 1
• Space = 0
(6) Reception control (DTR signal)
• Mark : Data not transferable
• Space : Data transferable
(7) Transmission control (TXD signal)
• DC1 code(11H) X-ON : Data receivable
• DC3 code(13H) X-OFF : Data not receivable
7.2 Connector's Pin Configuration
No.
1
7
3
20
2
6
Signal Name
FG
GND
RXD
DTR
TXD
DSR
Function
Frame Ground
Signal Ground
Received Data
Printer BUSY Signal
Transmitted Data
Data Set Ready
Input/Output
Input
Output
Output
Input