HP 5961-0509 Status Response Syntax, Value field, Two example status responses are shown below

Status Response Syntax

All status responses start with the letters “PCL” followed by a Carriage Return control code (decimal 13; <CR>) and a Line Feed control code (decimal 10; <LF>). In addition, each remaining line of the response is terminated by a Carriage Return and Line Feed control code. Finally, status responses are terminated by a Form Feed control code (decimal 12; <FF>). The basic syntax for the status response is shown below.

PCL<CR><LF>

INFO TITLE<CR><LF>

KEYWORDn=DATAn<CR><LF>

KEYWORDn=DATAn<CR><LF>

￿￿￿￿￿

<FF>

TITLE, KEYWORDn, and DATAn are strings that vary depending on the particular status readback command being executed. Each status readback response has one or more keyword lines associated with it. A slight variation of this is the Echo command response. This response is shown below.

PCL<CR><LF>
ECHO	ValueField<CR><LF>
<FF>

	ValueField is the decimal number taken from the Echo command
	value field.
Note	Keywords may be added for future printers that are not documented
	here. Applications that use status readback should be designed to
	ignore lines with keywords they do not recognize.
	Two example status responses are shown below.
	PCL<CR><LF>
	INFO MEMORY<CR><LF>
	TOTAL=100000<CR><LF>
	LARGEST=25000<CR><LF>
	<FF>

16-6Status Readback EN