HP Color LaserJet 5500 Technical Reference Manual page 149

TIMED Variable
Note
Note
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.
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.
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.
Status Readback Commands 7-41