Zebra Technologies radio frequency identification (rfid) User Manual

ZPL Overview

11/14/2008

RFID Programming Guide

58978L-008 Rev. A

In addition to reading or encoding RFID tags, the RFID ZPL commands also provide for RFID 
exception handling, such as setting the number of read/write retries before declaring a 
transponder defective (set with 

^RR

, 

^RT

, and 

^WT

) or setting the number of labels that will 

be attempted if an error occurs (set with 

^RS

).

For example, if an RFID label fails to program correctly or if the transponder cannot be 
detected, the printer ejects the label and prints VOID across it. The printer will try to print 
another label with the same data and format for the number of RFID labels specified by the 

^RS

 command. If the problem persists, the printer follows the error handling instructions 

specified by the 

^RS

 command: the printer may remove the problematic format from the print 

queue and proceed with the next format (if one exists in the buffer), or it may place the printer 
in Pause or Error mode.

Consider the following before using any command in this section:

Before using a particular command, verify that it is compatible with your printer and 
firmware version. See 

.

If a parameter in the following tables is designated as not applicable for a particular 
printer, any value entered for the parameter will be ignored, but the place holder for the 
field is required.