Pi (Paper Instruction) Line; Data Polarity; Data Bit 8 - Printronix P9212 Setup Manual

Data Bit 8

The Data Bit 8 parameter allows access to the extended ASCII character set.
Normally, this parameter is enabled. When this parameter is disabled, the
printer interprets bit 8 of each incoming data character as a zero, regardless
of its actual setting.

PI (Paper Instruction) Line

The Paper Instruction Line parameter controls how the printer interprets the
PI line on the Dataproducts parallel interface from the host computer. The PI
line is a signal from the host that controls vertical paper motion. The setting
of the PI Line parameter is dependent on your host computer.
•
Enable: When the PI line is asserted, the printer interprets the data lines
as a paper instruction (PI). When the PI line is de-asserted, the printer
does not interpret the data lines as a paper instruction; it treats them as
ordinary data.
•
Disable: The printer always ignores the PI line, and it does not interpret
the data lines as a paper instruction; it treats them as ordinary data.
NOTE: The PI Line parameter must be disabled if the host computer does
NOTE: The PI Line parameter is available only when the P-Series Printer

Data Polarity

The Data Polarity parameter can be set to Standard or Inverted. It must be set
to match the Data Polarity of your host computer.
•
Standard: The printer does not invert the data.
•
Inverted: The printer inverts the data it receives on the data lines from
the host computer. Ones become zeros, and vice-versa.
3–56
not drive or control the PI signal on the interface. If the PI signal on
the interface is not controlled by the host, and the PI Line parameter
is enabled, rapid vertical paper movement ("slewing") will occur.
Protocol has been selected.
Configuring the Printer