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Graphics4-8
Plot Data Line Format
A
plot data line may contain any number of plot data bytes up to the maximum of 132 for hori
Ć
zontal
dot density of 60
dpi (Data P
rocessing mode) or 198 bytes for a horizontal dot density of
90
dpi (Correspondence mode). If
A
uto Line F
eed is disabled, any bytes over the maximum are
lost.
If the maximum is exceeded and A
uto Line F
eed is enabled, a Line F
eed (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
T
erminator (0A hex or 0C hex). The control sequence for sending
the
P-Series
Normal Densi
Ć
ty
Plot
is as follows:
1.
Send the plot command code ENQ (05 hex).
2.
Send the plot data bytes (refer to NO T
AG on page NO TAG).
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 R
eturn = Carriage R
eturn + Line F
eed (CR
=
CR + LF).
a. A
line feed (0A hex) used as the line terminator causes the contents of the buffer to
be plotted and the paper advances a single dot row, based on the vertical density of
the
current mode.
b. A
form feed (0C hex) used
as the line terminator causes the contents of the buffer to
be
plotted and the paper to advance to the
top of the next form.
4. Regardless
of
which line terminator code is sent, the printer will default to the previously
selected
print mode unless further plot control codes are provided with the data.
NOTE
: F
ailure to adhere to this format may cause unexpected results.
DOUBLE DENSITY PLOT
For double density plot, the plot line contains: Control Code 04 hex, plot data bytes, a Line
Terminator (0A hex or 0C hex), Control Code 05 hex, plot data bytes, and a Line Terminator.
The
control sequence for sending P-Series
Double Density Plot is as follows:
1. Send the even dot plot control code EOT (04 hex), followed by plot data bytes (refer to
NO TAG on page NO TAG).
2. Send a line terminator, which causes the printer to plot the data bytes; the paper is not
advanced
in Double Density Plot; the printer now waits for the second plot command and
plot
data bytes.