Printronix S828 Programmer's Manual page 114

Programmer Manual PTX‐S828
IO (Include Overlay): The IO command causes a previously stored overlay to merge onto the current
overlay.
IPS (Include Page Segment): The IPS command causes a previously stored page segment to merge
onto the current overlay. An ID in this command specifies the selected page segment.
EP (End Page): The EP command causes the printer to leave the overlay state and return to the home
state. Printronix recommends that this command contain an acknowledgment request to verify successful
transmission of the overlay.
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 reply
indicates to the host that the printer has accepted all the overlay data and stored this information for later
printing.
Page Sequence
The page sequence causes data to print on the current page. This data can include previously stored
overlays or page segments, as well as text data. The following commands illustrate a typical page
sequence:
● BP (Begin Page)
● WT (Write Text)
● IO (Include Overlay)
● IPS (Include Page Segment)
● WIC (Write Image Control)
● WI (Write Image)
● END (End)
● WT (Write Text)
● IO (Include Overlay)
● IPS (Include Page Segment)
● EP (End Page)
● ACK (Acknowledgment Reply).
Note: This sequence is only an example. A page can contain any combination of text, image blocks,
graphics blocks, bar code blocks, page segments, or overlays.
BP (Begin Page): The host sends the BP command to the printer, causing the printer to leave the home
state and enter the page state.
WT (Write Text): The WT command sends text data to the printer. Because the printer is currently in a
page state, this text information prints at this time. The host can send multiple WT commands to the
printer while in the page state.
IO (Include Overlay): The IO command causes a previously stored overlay to merge onto the current
page. This command contains an ID field, which selects the desired overlay.
IPS (Include Page Segment): The IPS command causes a previously stored page segment to merge
onto the current page. An ID in this command specifies the selected page segment. The selected page
segment now prints on the current page.
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 bit image data to the printer. One or more of these
commands create the actual image for printing. Because the printer is now in the page state, the image
prints as it is received by the printer.
Chapter 4 IPDS Commands 112 260071‐001A