Zebra Technologies radio frequency identification (rfid) User Manual

^RT

11/14/2008

RFID Programming Guide

58978L-008 Rev. A

Description   Use this command to tell the printer to read the current RFID tag data. The data 
can be returned to the host via the 

^HV

 command.

Format   ^RT#,b,n,f,r,m,s

This table identifies the parameters for this format.

The ^RT command is provided only for backward-compatibility with label formats 

that were developed for older Zebra RFID printers. Use 

 instead whenever 

possible. See 

 for the list of printers and 

firmware with which you can use this command.

#

= number to be 

assigned to the field

Accepted values: 0 to 9999

Default value: 0

b

= starting block 

number

Accepted values: 0 to n, where n is the maximum number of 
blocks for the tag.

Default value: 0

n

= number of 

blocks/bytes to read

For R4Mplus printers with firmware version SP994X 
(European version):
This parameter applies only when the starting block number 
(parameter b) is 1.

Accepted values: 1 to n, where n is the maximum number of 
bytes for the tag. For UCODE EPC 1.19, n is 32.

Default value: 1

For all other supported printers:
Accepted values: 1 to n, where n is the maximum number of 
blocks for the tag type minus the starting block number. For 
example, if the tag has 8 blocks (starting with block 0) and 
you start with block 6, n can be 2. This would return block 6 
and block 7 information.

Default value: 1

f

= format

Accepted values: 

0 = 

ASCII

1 = 

Hexadecimal

Default value: 0

r

= number of retries

Changes the number of times that the printer attempts to read 
a particular block of a single RFID tag. (Same retry rules as 
the 

^RR

 command.)

Accepted values: 0 to 10

Default value: 0