ZPL II Commands for RFID
^HL or ~HL
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58978L-008 Rev. A RFID Programming Guide 11/14/08
^HL or ~HLReturn RFID Data Log to Host
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
Comments
• 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 RFID Error Codes and Messages onpage 53)
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.