HP PCL/PJL reference - Printer Job Language Technical Reference Manual

7-40 Status Readback Commands EN

TIMED Variable

The TIMED variable allows “automatic polling” of the printer without

host intervention and without exiting the current printer language

(back to PJL). Values from 5 to 300 indicate the time interval between

status messages in seconds. This feature is turned off by setting the

value to 0. The status message returned when this command is

enabled is similar to that solicited by the INFO STATUS command.

Note The accuracy of the timer may vary +/– 10% due to delays in data

transmission and other system variables. To allow for this use a timing

window in your application.

The “CODE=” portion indicates a status code number. See

Appendix D for a complete list of status code numbers. The

“DISPLAY=” portion of the returned status indicates the message

currently displayed on the control panel. The “ONLINE=” portion

indicates whether the printer is online or offline.

Note The “string” portion of the “DISPLAY=string” status message is

localized; the same message displayed on the control panel appears

in whichever language is being used.

For those printers supporting Japanese printing when the language is

set to Japanese strings which correspond to a control panel message

are displayed on the control panel using the JIS X0201-76 character

set.

Example: Using Timed Unsolicited Status

In this example a status message is sent to the host every 30

seconds.

@PJL USTATUS TIMED = 30 <CR><LF>

<ESC>%-12345X