Format Of Status Readback Responses - HP Color LaserJet 5500 Technical Reference Manual

Format of Status
Readback
Responses
When PJL sends printer status information to the host, the
response is in a readable ASCII format that always begins
with the @PJL prefix and ends with a <FF> character. For
example, the readback response for the INQUIRE
command is:
@PJL INQUIRE [LPARM: personality | IPARM: port ]
~ variable <CR><LF>
value<CR><LF>
<FF>
Your application should be able to read all the data between
the "@PJL" header and the <FF> control code.
Lines within the PJL status response begin with a specific
keyword, as described in the command descriptions in this
chapter, and end with the <CR><LF> control codes.
Future printers may support new keywords in the PJL
status response. Your application should ignore those lines
which it does not understand.
The format of the printer response for each STATUS
READBACK command is described in the command
descriptions.
Status Readback Commands 7-3