Introduction ; Syntax ; Example - Page 214

2001/10/02 

CHAPTER 5 PJL - 10 

4. 

KERNEL COMMANDS 

4.1. 

Introduction 

This section explains three PJL command, 

UEL

, 

ENTER

 and 

COMMENT

.  These commands provide the 

minimum set of tools to operate job control. 

UEL command (Universal Exit Command) 
ENTER command   
COMMENT command 

4.2. 

UEL Command 

The Universal Exit Command causes the printer to exit the current printer language and sets the printer into 
PJL mode. 

Syntax 

<ESC>%-12345X 

• 

The 

UEL

 command is a data stream sequence. 

• 

The 

UEL

 command indicates to the current printer language to finish a job.   If PJL is available, PJL commands 

which have not yet been executed are cancelled and the printer is ready to accept the next PJL command.  

• 

The 

UEL

 command must be placed in the first and last position of all PJL job command sequences. 

• 

Printers which have an Automatic I/O switching feature can use the 

UEL

 command in order to set job 

boundaries. 

• 

The 

@PJL

 prefix which is placed at the beginning of a PJL job must follow immediately after the 

UEL

command . 

• 

If the printer receives codes other than the PJL prefix, it enables the default printer language and prints the  
job. 

• 

ENTER

 command should be used in order to specify the printer language. 

Example 

<ESC>%-12345X@PJL<CR><LF> 

@PJL ENTER LANGUAGE = PCL <CR><LF> 

<ESC>E.......PCL JOB........<ESC>E 

<ESC>%-12345X 

4.3. 

EXECUTE Command 

The 

EXECUTE

 command orders the printer to execute the specified operation. 

This command is supported only by HL-1050/1070/1250/1270N/1450/1470N/P2500 printers. 

Syntax 

@PJL ENTER 

operation

 [<CR>]<LF> 

Parameters 

• 

operation

SHUTDOWN : 

The printer goes into sleep mode. 

DEMOPAGE : 

The printer prints the demo page. 

RESIFONT : 

The printer prints the list of resident fonts. 

PERMFONT: 

The printer prints the list of permanent download fonts. 

PRTCONFIG: 

The printer prints the list of printer settings.

• 

If the printer receives this command,  it immediately executes the specified operation. 

• 

If this command specifies an operation which is not supported, this command is ignored.