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289

RFID Commands

^HR

9/15/06 ZPL II Programming Guide 45541L-004 Rev. A

^HR

Calibrate RFID Transponder Position

Description Use this command to initiate an RFID transponder calibration for a specific

RFID label. Results are returned to the host computer. This calibration is used to determine the

optimal programming position for RFID media that may not meet the transponder placement

specifications for the printer.

Do not perform transponder calibration for RFID media that meets the transponder placement

specifications for your printer. Doing so will slow the printer’s throughput unnecessarily. To

order media that is designed for use with your RFID printer, contact your authorized Zebra

reseller.

During transponder calibration, the printer feeds the RFID label one-dot row at a time while

taking readings (via the READ TAG command and the WRITE TAG commands) to profile the

RFID transponder. Based on the results, the printer determines the optimal programming

position for the label and returns a results table to the host. The calibrated value is used as the

programming position for the

^RS command, can be overwritten by the ^RS command, and is

saved to nonvolatile memory (the value is saved even if the power is turned off).

This calibration takes into account the print mode, backfeed mode, and tear off position. The

RUN option in the RFID TAG CALIB control panel parameter performs the same

calibration but does not create a results table.

Format ^HRa,b

This table identifies the parameters for this format.

Important • This command is not supported by all printers or firmware. See Table 13

on page 287 for the list of printers and firmware with which you can use this command.

Important • If a label format specifies a value for parameter p (read/write position of the

transponder) in the

^RS command, that value will be used for the programming position for

all RFID labels until a new position is specified or until the printer is turned Off (

O) and then

back On (

I).

Parameters Details

a = start string

User text to appear before the results table.

Accepted values: any string less than 65 characters

Default value:

start

= end string

User text to appear after the results table.

Accepted values: any string less than 65 characters

Default value:

end

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