HP 5100 Service Manual - Page 83
protect, PJL, PML, Control panel, TOO COMPLEX, PRESS GO TO, CONTINUE
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Page protect Page complexity (rules, complex graphics, or dense text) might exceed the printer's ability to create the page image fast enough to keep pace with the image-formation process. If page protect is disabled, and a page is too complex, it might print in parts (for example, the top half on one page and the bottom half on the next page). Some print-data loss is likely in these instances, and the 21 PAGE TOO COMPLEX error message appears, alternating with PRESS GO TO CONTINUE. Page protect allows the formatter to create the entire page image in page-buffer memory before physically moving the paper through the printer. This process ensures that the entire page will be printed. Page protect applies only to PCL printing. The default setting is "auto." PJL Printer job language (PJL) is an integral part of configuration, in addition to the standard printer command language (PCL). With standard cabling, PJL allows the printer to perform the following functions: Two-way communication with the host computer through a bidirectional parallel connection. The printer can tell the host such things as the control panel settings, and makes it possible for the control panel settings to be changed from the host. Dynamic I/O switching. This makes it possible for the printer to be configured with a host on each I/O. The printer can receive data from more than one I/O simultaneously, until the I/O buffer is full. This can occur even when the printer is offline. Context-sensitive switching. This makes it possible for the printer to automatically recognize the personalities (PS or PCL) of each job and configure itself to serve that personality. Isolation of print environment settings from one print job to the next. For example, if a print job is sent to the printer in landscape mode, the subsequent print jobs print in landscape only if they are formatted for landscape printing. PML Peripheral Management Language (PML) can be used for remote configuration and status readback through the I/O Ports. Control panel The formatter PCA sends and receives printer status and command data through a control panel PCA. See page 42 for more information about the control panel. See and page 193 for control panel messages. Q1860-90918 Chapter 5 Functional information 81