Plot Data Line Format - Printronix P3000 Series User's Reference Manual

Plot Data Line Format

A plot data line may contain any number of plot data bytes up to the maximum of 132 for horizontal dot
density of 60 dpi (Data Processing mode) or 198 bytes for a horizontal dot density of 90 dpi (Corre-
spondence mode). If Auto Line Feed is disabled, any bytes over the maximum are lost. If the maximum
is exceeded and Auto Line Feed is enabled, a Line Feed (LF) is forced and the remaining plot data is
printed as text on the next line.
The plot mode control code may occur anywhere in the line prior to the line terminator, but plot speed
may decrease if it is not at the beginning of the line.
NORMAL DENSITY PLOT
For normal density plot, the plot line contains: Control Code 05 hex, plot data bytes, and a Line Termi-
nator (0A hex or 0C hex). The control sequence for sending the P–Series Normal Density Plot is as
follows:
1. Send the plot command code ENQ (05 hex).
2. Send the plot data bytes. (Refer to Table 4–1 on page 4–11.)
3. Send a line terminator, either a Line Feed (LF, 0A hex) or a Form Feed (FF, 0C hex). A Carriage
Return (CR) may also be used instead of the LF code, provided the Carriage Return has been
configured for Carriage Return = Carriage Return + Line Feed (CR = CR + LF).
a. A line feed (0A hex) used as the line terminator plots the contents of the buffer and advances
the paper a single dot row, based on the vertical density of the current mode.
b. A form feed (0C hex) used as the line terminator plots the contents of the buffer and ad-
vances the paper to the top of the next form.
4. Regardless of which line terminator code is sent, the printer defaults to the previously selected
print mode unless further plot control codes are provided with the data.
NOTE: Failure to adhere to this format may cause unexpected results.
4–8 Graphics