Printronix SL4M - Manual (Page 131)

INTERFACES Submenus
131
• Offline Process
• Disable (factory default). When set to disable, the printer does not
process parallel/network data while offline.
• Enable . When set to enable, the printer continues to process (but not
print) the current network/parallel job while the printer is offline until
the printer's buffer is full.
Centronics
• Data Bit 8
• Enable (factory default). The PI line is not passed directly from host
to printer; all 8 bits are used for data bits, and characters in the hex
80-FF range can be accessed.
• Disable . When the host PI line is enabled, data bit 8 internally
indicates PI line status. To use the PI line, disable data bit 8, and
enable the Host PI configuration option (under the PI Ignored option).
NOTE: Data bit 8 is interpreted as either data bit 8 or PI signal, but never
both. When enabled as data bit 8, data bit 8 has priority over the PI
signal, and all data above hex 7F is used to access character data
and not to interpret PI line data.
Conversely, when data bit 8 is disabled and the PI signal is used, data
bit 8 of the data is reserved for use as the PI function, and you cannot
access characters in the hex 80-FF range. Therefore, to access
characters in the hex 80-FF range, data bit 8 must be enabled.
• PI Ignored . The PI (Paper Instruction) signal is used to control vertical
paper motion.
• Enable (factory default). Ignores the PI signal and treats the data as
characters or control codes.
• Disable . Causes the printer to interpret the eight data lines as VFU
commands when the PI signal is true.
• Data Polarity . The Data Polarity parameter must be set to match the data
polarity of your host computer.
• Standard (factory default). Does not expect the host computer to
invert the data.
• Inverted . Expects the data received on the data lines from the host
computer to be inverted. Ones become zeros and vice versa.
• Resp. Polarity . The Response Polarity parameter must be set to match
the response polarity of your host computer.
• Standard (factory default). Does not invert the response signal.
• Inverted . Inverts the response signal sent to the host computer.
• Busy on Strobe
• Enable (factory default). Asserts a busy signal after each character is
received.
• Disable . Asserts a busy signal only when the print buffers are full.