Zebra Technologies radio frequency identification (rfid) User Manual

ZPL II Commands for RFID
^HL or ~HL

58978L-008 Rev. A

RFID Programming Guide

11/14/08

Description   The printer continually logs RFID data and stores it in the printer’s RAM. Use 
this command to request that the RFID data log be returned to the host computer, to clear the 
current data log, and to restart data recording. The data returned show the status of the RFID 
read, write, and lock commands and show any resulting error codes.

Format   ^HL or ~HL

• Data is shown in the format sent by the ^RFW command (ASCII, Hex, or EPC). 

• In the log, the data displays in this manner:

C,EEEE,DDDDDDDDDDDDDDDDDDDDDDDD

where 

C

 = the RFID operation

UHF:

R = Read

W = Write

L = Lock

Q = Quick Write EPC Data and Passwords

Z = Set RFID Tag Password and Lock Tag

A = Read Password

I  =  Read RFID Tag ID

HF:

R =  read (^RF)

W =   write  (^RF)

r = read  (^RT)

w = write  (^WT)

l = Lock 

TIDR = Read RFID Tag ID

EASS =  Enable/Disable E.A.S. Bit

AFIR = Read AFI Byte

DSFIDR = Read DSFID Byte

AFIW = Encode AFI Byte

DSFIDW = Encode DSFID Byte

EEEE

 = the RFID error code (see 

)

DDDDDDDDDDDDDDDDDDDDDDDD

 = data read or written

• If the log exceeds 64K (approximately 2000 operations), the data log is cleared 

automatically, and data recording restarts. When this happens, the following appears in the 
log:

Logfile automatically reset

• If the printer loses power, the log is lost. If the log results are important to you, retrieve the 

log frequently.