Response Syntax ; Parameters ; Parameter - Page 246

2001/10/02 

CHAPTER 5 PJL - 42 

Response Syntax 

@PJL ECHO [< words >] <CR><LF> 

<FF> 

• 

< 

words

 >  

The beginning of this parameter must be a printable character.  Then this parameter consists of characters 
from ASCII 33 to 255, space characters and horizontal tab characters. 
This < 

words

 > parameter can be written without quotation marks as this is not a string of variables. 

The parameter is recommended to be unique, distinguishable words from other print jobs, such as the time 
determined by the real time clock and user name, so as to confirm the received message from the printer is 
definitely the answer for the 

ECHO

 command which the application sent. 

The length of the < 

word

 > must be within 80 characters. 

Parameters   

Parameter 

Valid characters  

< words >

ASCII 33 to 255, <

SP

>, <

HT

> 

Example  

The application sends the following example to the printer : 

<ESC>%-12345X@PJL <CR><LF> 

@PJL COMMENT the ECHO command follows <CR><LF> 

@PJL ECHO This is a sample 22:03:00 <CR><LF> 

<ESC>%-12345X 

The printer sends back the answer for the above 

ECHO

 command : 

@PJL ECHO This is a sample 22:03:00 <CR><LF> 

<FF> 

After receiving the above answer, all the messages from the printer are the requested information from the 
application, except for unsolicited status information. 

7.5. 

INFO Command 

The 

INFO

 command requests the printer to send back information on a specific category of the printer such 

as 'ID' (model name), 'CONFIG' (printer configuration), 'MEMORY' (available printer memory), 'STATUS' 
(current printer status), 'VARIABLES' (list of setting variables),  'USTATUS' (list of unsolicited status 
variables), 'PAGECOUNT' (total printing page number of the printer), 'PHYSICALMEMORY' (Physical memory 
size of printer) as shown in the following table. 

This 

INFO

 command can request the information from only one category at a time.  If you would like to get 

the information from more categories, send multiple 

INFO

 commands. 

Syntax  

@PJL INFO 

category

 [<CR>]<LF> 

Response Syntax  

@PJL INFO category <CR><LF>   

[lines of printable characters or <WS> with <CR><LF> at the end of 

each line] 

<FF> 

If the variable is not supported by the printer, it returns the response in the following syntax : 

@PJL INFO 

category 

<CR><LF> 

"?"<CR><LF> 

<FF>