User`s manual

5–5Interfaces
• Response Polarity (standard or inverted)
• Strobe Polarity (standard or inverted)
• Latch Data On Leading or Trailing Edge of Strobe
Refer to the Configuration Diagram in Chapter 4, Printer Configuration, for
information on selecting parameter values.
Some application programs may require a unique configuration. If the printer
is not working properly in the configuration you selected, contact your
authorized service representative.
Centronics Parallel Interface
The Centronics parallel interface enables the printer to operate with
controllers designed for buffered Centronics printers. Note that the length of
the data cable from the host computer to the printer must not exceed 40 feet.
Centronics Interface Signals
Centronics interface signals between the computer and the printer are defined
as follows:
PE (Paper End) – A high true level from the printer that indicates it has run
out of paper.
SLCT (Select) – A high true level from the printer that indicates the printer is
ready for data transfer and the ON LINE switch has been activated.
Busy – A high true level from the printer to indicate the printer cannot
receive data.
ACKNLG (Acknowledge) – A low true pulse from the printer indicating the
character or function code has been received and the printer is ready for the
next data transfer.
Data Strobe – A low true, 100 ns pulse from the host that clocks data into the
printer.
Data Lines – Eight standard or inverted levels from the host that specify a
character or function code. Sensing Data Line 8 is controlled by printer
configuration.