1. ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
  2. ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
  3. ZPL RFID Commands
  4. ^RL
  • ZPL II, ZBI 2, Set-Get-Do, Mirror, WML Programming Guide
^RL

^RL

Use this command to lock/unlock RFID tag memory.

Lock/Unlock RFID Tag Memory

The
^RL
 command has four distinct formats and functions:
  • ^RLP
     –
    Permanently Lock All Tag Memory
     Locks all memory banks and/or passwords, as defined by the chip manufacturer.
  • ^RLB
     –
    Permanently Lock Specified Memory Sections
     Locks blocks of user memory in an unwriteable state.
  • ^RLM
     –
    Lock/Unlock the Specified Memory Bank
     Locks a password or an entire memory bank in a writeable or unwriteable state. These locks/unlocks can be permanent or reversible.

^RLP – Permanently Lock All Tag Memory

Some chip manufacturers have implemented an alternative permalocking mechanism that must be applied to all memory by permalocking certain banks and/or passwords. The RFID chips' datasheet may specify permalocking any combination of the Kill, Access, EPC, User, and TID memory to permalock the RFID tag. The
^RLP
 command automatically selects the required memory locations to permalock the RFID tag for a particular chip.
The access password is not required for this command. The printer will use the default of
00000000
.
Format:
^RLP

^RLB – Permanently Lock Specified Memory Sections

The
^RLB
 command permanently locks (permalocks) one or more sections (individual sub‑portions) in a tag’s user memory. The section sizes for each tag is defined by the tag manufacturer.
Format:
^RLB,s,n
Parameters
Details
s =
starting section
Specify the starting section of memory to lock.
n =
number of sections
Specify the number of sections to lock.

^RLM – Lock/Unlock the Specified Memory Bank

The
^RLM
 command locks/unlocks the specified password or memory bank on an RFID tag. You can use this command to do the following:
  • lock individual passwords, thereby preventing or allowing subsequent reads or writes of that password
  • lock individual memory banks, thereby preventing or allowing subsequent writes to those banks
  • Permanently lock (permalock) the lock status for a password or memory bank
Format:
^RLM,k,a,e,u
Parameters
Details
k =
kill password function
Values:
U
 = unlock the kill password*
L
 = lock the kill password*
O
 = permanently unlock (Open) the kill password
P
 = permanently lock (Protected) the kill password
a =
access password function
Values:
U
 = unlock the access password*
L
 = lock the access password*
O
 = permanently unlock (Open) the access password
P
 = permanently lock (Protected) the access password
e =
EPC memory bank function
Values:
U
 = unlock the EPC memory bank*
L
 = lock the EPC memory bank*
O
 = permanently unlock (Open) the EPC memory bank
P
 = permanently lock (Protected) the EPC memory bank
u =
USER memory bank function
Values:
U
 = unlock the USER memory bank*
L
 = lock the USER password bank*
O
 = permanently unlock (Open) the USER memory bank
P
 = permanently lock (Protected) the USER memory bank
* The access password must be set to something other than the default of
00000000
 to use this value. See the examples for this command for guidance.

Examples

^RLM Example 1:
The following command locks all memory banks using a previously specified access password.
^RLM,L,L,L,L^FS
^RLM Example 2:
The following command locks the user memory banks using a previously specified access password.
^RLM,,,,L^FS
^RLB Example:
The following command permalocks sections 0 to 4 of user memory using a previously specified access password.
^RLB,0,4^FS
Combination ^RLM and ^RLB Example 1:
This code does the following:
  • writes 12 bytes to user memory
  • writes
    12345678
     to the access password and
    11223344
     to the kill password
  • permalocks 6 sections of user memory using
    12345678
     as the access password
  • locks the kill and access passwords and permanently unlocks the EPC memory, using
    12345678
     as the access password
^XA
^RFW,H,0,12,3^FD112233445566778899001122^FS  
^RFW,H,P^FD12345678,11223344^FS  
^RLB,0,6^FS  
^RLM,L,L,O^FS
^XZ
Combination ^RLM and ^RLB Example 2:
This code does the following:
  • writes 12 bytes to user memory
  • permalocks 6 sections of user memory using
    00000000
     as the access password
  • permalocks the kill password and access password using
    00000000
     as the access password
^XA
^RFW,H,0,12,3^FD112233445566778899001122^FS
^RLB,0,6^FS
^RLM,P,P^FS
^XZ