TS1700/TK18 PRINTERS OPERATION MANUAL
4.4.
RS-232 SERIAL INTERFACE
4.4.1- RS-232 Serial interface specifications
•
Data transmission type:
Serial
•
Synchronization:
Asynchronous
•
Flow control:
None, Hardware and Xon/Xoff
•
Signal levels (RS232):
MARK = -3 to -15 V
Logic ‘1’/OFF
SPACE = +3 to +15 V Logic ‘0’/ON
•
Speed:
9600, 19200, 38400 and 115200 baud.
•
Data length:
8 bits
•
Parity:
none, even and odd
•
Stop bits:
Fixed to 1
4.4.2- Change between online and offline mode
The printer is in offline mode:
1) When powering up or resetting the printer, until the printer is ready to receive data.
2) When the door is opened.
3) After pressing the button while the paper advances.
4) When ‘out of paper’ causes the printer to stop printing.
5) When the power supply has a temporal abnormal voltage change.
6) When an error has occurred.
4.4.3- Serial RS-232 interface pins assignment
The assignments of the terminals of the RS-232 connector and the functions of its signals are
described in the following figure and table:
Fig.4.10.
Serial RS-232 interface pins.
Pin number
Signal name
Function
5
SGND
Signal ground
7
RXD
Data reception line
8
TXD
Data transmission line
9
RTS
Indicates whether the printer is busy
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