Error Handling; Pin Assignments - Epson EPL-N2000 User Manual

Once the vacant area for data in the buffer recovers to 512 bytes,
the printer outputs the XON code or sets the DTR flag to high
(SPACE), indicating that it is again ready to receive data.

Error handling

An asterisk (*) is printed if a parity error, framing error, or
overrun error is detected.

Pin assignments

The serial interface connector pin assignments and interface
signals are described in the table below. "Direction" refers to the
direction of signal flow as viewed from the printer.
Signal
RS-232C
pin
1 DTR
2 CTS
3 TXD
4 GND
A-10 Specifications
Current
Direction loop
OUT N.C.
IN —
OUT TTY-TXD
return
— GND
Description
Direction
— Data terminal ready.
Indicates whether or not
the printer is ready to
receive data. If the
printer ready protocol is
not selected, the printer
is always ready to
receive data ( pin is
always HIGH). If the
printer ready protocol is
selected, the printer
can accept data when
the pin level is HIGH and
cannot accept data
when the pin level is
LOW. When the DTR
signal goes LOW, the
host computer must
stop sending data within
256 characters. This
function can be set on
or off with the printer's
default-setting mode.
— Always ignored.
IN Transmits data from the
printer to the computer.
— Always ignored.