Zebra Technologies APL-I User Manual

Commands
Immediate Commands

14177L-003 

APL-I  Reference Guide

11/24/09

Immediate commands are executed when the printer receives them. The printer mode does not 
matter. 

Purpose  To abort the current print job.

<EM>

Based on testing, this command works the same on the Zebra printer with 

APL-I firmware as on the 3400D printer.

The printer stops printing the current batch, but continues processing the other 

commands in the buffer. The batch count is reset.

Purpose  To check the printer for errors and warnings.

<BEL>

Based on testing, this command works the same on the Zebra printer with 

APL-I firmware as on the 3400D printer.

The error code is either a command syntax error or a RAM usage error. A returned 

ASCII number represents the latest error. 
Important • 

If no error has occurred since the last power up, the printer returns a zero. When 

this command is sent, the error code is always reset to 00.

Purpose  To send the label length and gap length to the host.

<ESC>L

Based on testing, this command works the same on the Zebra printer with 

APL-I firmware as on the 3400D printer.

If you are using continuous media, the printer sends the length identified by the 

Maximum Label Length, Set

 command. Label length is the length of the current label. If the 

current label is longer than the distance between the printhead and the sensor, then the 
previous label’s length is used.