^RQ - Write RFID EPC Data and Passwords
Writes EPC data together with the access and kill passwords in a single operation.
^RQ writes EPC data together with the access password and the kill password in
one operation, where ^RF and ^RZ need more than one. The payload travels in
the ^FD of the field. That field belongs to the tag, so the renderer draws
nothing for it and the passwords stay out of the printed image.
Syntax
^RQSupport
Accepted and skipped, because it configures the printer rather than the label. It cannot change the rendered output, and Labelary skips it too.
Encodes the transponder, so it changes nothing on the printed side. The parser consumes the ^FD that carries the EPC with the access and kill passwords. It draws nothing for that field, so none of it reaches the label. The renderer does not parse this command. It reports IGNORED_COMMAND at info severity, which does not reach X-Warnings. Labelary is also silent, so the rendered label is identical in both engines. Neither Labelary's command reference nor the 2006 ZPL II Programming Guide documents this command, so this page publishes no parameter table rather than a guess. — not pinned by a test
Labelary renders this command.
Parameters
^RQ takes no arguments.
Behavior
Neither the 2006 edition of the ZPL II guide nor the Labelary command reference documents this command, so this page gives no parameter table instead of a guessed one. The Labelary command table lists the command as supported, and Labelary accepts it and reports nothing.
The measurement covers the field data. The renderer consumes it and draws nothing,
so an ^RQ puts neither the EPC nor a password into the printed image. Until
2026-07-30 the renderer dropped the command and kept its ^FD. That field reached
the text renderer with no bar code element. The renderer drew an EPC and two
passwords as text in the default font A at approximately 3 pt.
Tested behavior
Differences from the specification
Example
Writing EPC data together with the passwords that protect it:
^XA
^FO50,50^A0N,40,40^FDEPC and passwords^FS
^RQ^FD1234567890ABCDEF^FS
^XZ
Related commands
^RFRead or Write RFID FormatReads a tag, encodes a tag, or declares the access password used by later lock commands.^RBDefine EPC Data StructureDeclares how many bits each field of an EPC code occupies, for a later EPC-format read or write.^RZSet RFID Tag PasswordSets the access or kill password stored on a tag.