User manual

Xiamen Rongta Technology Co., Ltd.
www.rongtatech.com 11
Self-checking procedure：Make sure the printer is connected to the power,
then press the feed key and switch on the power supply while the key is still under
pressing. At the same time, the printer begins to self-checking. Please loosen the key
within five seconds and the printer would print the self-testing list after it.
The test list looks like the following when it finished:
Selftest
*****
** Completed **
6、Serial Interface
RP58 serial interface adopt RS-232 standard, baud rate is 9600bps, data structure
is no parity，8 bits of data and 1 stop bit, supports RTS/CTS and XON/XOFF
handshake protocol.
Pin function of serial interface is listed as below:
Pin number
Model
Signal Source
Specification
2
TXD
Printer
The printer will be sent XON/XOFF to PC when
operating the XON/XOFF handshake protocol.
3
RXD
PC
Printer received the data from PC.
7
RTS
Printer
The signal reflects the current printing status, low
voltage means the printer could not receive the
data, high voltage is contrary.
5
GND
--------
Signal Source
4
DTR
Printer
The same as pin number 7。
Connection diagram of serial interface between printer and PC:
TXD 2 2 RXD
RXD 3 3 TXD
RTS 7 8 CTS
DTR 4 1 DCD
GND 5 5 GND