HP 5961-0509 manual Status Response

Note

Note

Status Response

When the printer receives a status request (command), it processes that request and forms the response data. This data is then stored in an I/O status buffer. The response is saved in this buffer until it is either read (by any user) or the printer is turned off.

In addition to clearing the status buffer by reading the status response or by turning off the printer, status responses are cleared if one the following settings are changed:

zPrinter resolution (600/300)

zPage protection

zLanguage personality

Status requests and their associated response are processed in the order in which they are received.

The number of responses the printer can buffer varies, depending on internal printer operations. When requesting status, especially in the case where multiple applications or users are sharing one printer, HP recommends that you request one item, and then read its response prior to making another request.

Since the printer may contain a status response requested by a previous application’s operation, it is important to use the Echo command (described later in this chapter) to synchronize your application’s request with the printer’s responses. Refer to the Echo command description and to the “Programming Hints” section at the back of this chapter for additional information.

The number of status responses a printer can buffer varies from printer to printer. The HP LaserJet 4 printer can store 5 responses. Refer to the PCL 5 Comparison Guide for printer specific information.

A status response is returned to the printer I/O port from which it was requested.

EN Introduction 16-5