Error Handling - Epson LQ-1050 User Manual

Signal level
Mark (1) -3 V to -27 V
Space (0) +3 V to +27 V
Handshaking
Handshaking by DTR signal or X-on/X-off. The DTR signal changes
to mark-meaning the printer is not ready to receive data-when
the number of bytes free in the input buffer goes down to 256. The
signal changes to space-meaning that the printer is now ready-
when the number of bytes in the input buffer rises to 528.

Error handling

A * character is printed if a parity error is detected. All other errors
are ignored.
Connector
6-pin DIN connector
In this table, the direction of signals is given relative to the printer.
2
8-14 Technical Specifications
Direction
Transmits data for X-on/X-off
Indicates whether or not the printer is
ready to receive data. "Mark" level
indicates printer is not ready to
receive data.
Receives data
Signal (logic) ground level
Printer chassis ground