Initialization - Epson LQ-2550 User Manual

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
D-sub 25-pin connector
In this table, the direction of signals is given relative to the printer.

Initialization

There are the three ways that the printer can be initialized (returned to a
fixed set of conditions).
Hardware initialization
Software initialization
Technical Specifications
When the power is turned on
l
When the printer receives an INIT
l
signal at the parallel interface (pin 31
goes LOW).
Software sends the ESC @ (initialize
l
the printer) command.
A-13