Printronix S828, Руководство программиста

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Programmer Manual PTX ‐ S828
Chapter 4 IPDS Commands 110 260071 ‐ 001A
● Text color.
LPP (Logical Page Position):
The LPP command positions the upper-left corner of the logical page (as
defined by the LPD command) with respect to the top-of-form setting. This command locates the logical
page on the physical medium.
LCC (Load Copy Control):
The LCC command specifies which overlays to include on each subsequent
page and which suppressions to activate for each page. Suppression allows selective suppression of data
while printing.
LFE (Load Font Equivalence):
The LFE command maps a local font identifier (from within the text,
graphics, or bar code data) to a global ID used for resource management. This command also specifies
for each font attributes, such as bold, double-strike, double-wide, and italics.
ACK (Acknowledgment Reply):
If the previous command had the ARQ bit on, the printer responds with
the ACK reply to inform the host of successful execution of all the previous commands. This command
indicates to the host that the printer is now ready to accept data for print operations. This is the end of the
initialization and preparation sequence.
Page Segment Sequence
The page segment sequence creates one or more page segments for later printing. The following
command sequence illustrates the loading of a sample page segment:
● BPS (Begin Page Segment)
● WT (Write Text)
● WIC (Write Image Control)
● WI (Write Image)
● END (End)
● WT (Write Text)
● EP (End Page)
● ACK (Acknowledgment Reply).
Note:
This sequence is only an example. A page segment can contain any combination of text, image,
graphics, or bar code data.
BPS (Begin Page Segment):
The host sends the BPS command to the printer, causing the printer to
leave the home state and enter the page segment state. The page segment state creates a segment of
page data to save within the printer for later printing. The BPS command contains an identifier (ID) for
later use in selecting this segment. This segment can contain combinations of text, images, bar codes, and
graphics.
WT (Write Text):
The WT command sends text data to the printer. Because the printer is currently in a
page segment state, this text information does not print at this time. Instead, the data becomes part of the
page segment. The host can send multiple WT commands to the printer while in the page segment state.
WIC (Write Image Control):
The WIC command causes the printer to enter the image block state.
Parameters in this command define the image size, scale, initial coordinates, and color of the image.
WI (Write Image): The WI command sends a block of image data to the printer. One or more of these
commands create the actual image for later printing.
END (End):
The END command terminates the image block state. The printer remains in the page
segment state with the image stored for later use.