Define EPC Data Structure
RFID tags can have different partitions defined. This command specifies the number of partitions and how many bits are in each partition.
Format:
^RBn,p0,p1,p2, ..., p15
n = total bit size of the partitions |
Specify the number of bits to include in the partitions. Values: 1 to n , where n is the bit size of the tag. |
p0 ... p15 = partition sizes |
Specify the number of bits to include in the individual partitions. The partition sizes must add up to the bit size specified for the previous parameter. The largest individual partition size is 64 bits. |
Example:
The following command specifies that there are 96 bits used with three fields. Fields 1, 2, and 3 contain 10, 26, and 60 bits, respectively.
^RB96,10,26,60
The ZPL code to encode a tag with this format would look like this:
^RFW,E^FD1000.67108000.1122921504606846976^FS
When the tag is being encoded, the tag stores the data in the following way:
Field 1 contains
1000
. This value is stored in the first 10 bits
Field 2 contains
67108000
. This value is stored in the next 26 bits.
Field 3 contains
1122921504606846976
. This value is stored in the remaining 60 bits.
Example:
The following command specifies that there are 64 bits used with eight 8‑bit fields.
^RB64,8,8,8,8,8,8,8,8^FS
The ZPL code to encode a tag with this format would look like this:
^RFW,E^FD1.123.160.200.249.6.1.0^FS
When writing to the tag, each set of data is written in its respective 8-bit field.
Example:
This example uses the SGTIN-96 standard, which defines 96-bit structure in the following way:
| Header | Filter Value | Partition | Company Prefix Index | Item Reference | Serial Number |
SGTIN-96 | 8 bits | 3 bits | 3 bits | 20–40 bits | 24 bits | 38 bits |
|
10 (binary value) | 8 (decimal capacity) | 8 (decimal capacity) | 16,383 (decimal capacity) | 9 to 1,048,575 (decimal capacity*) | 33,554,431 (decimal capacity) |
* Capacity of Item Reference field varies with the length of the company prefix. |
The ZPL code to encode a tag with this format would look like this:
^XA
^RB96,8,3,3,20,24,38^FS
^RFW,E^FD48,1,6,770289,10001025,1^FS
^XZ
6 as the partition (indicates a 20-bit prefix and 24-bit item reference)
770289
as the company prefix
10001025
as the item reference
To read this EPC data and print the results on the label, you would use the following code:
^XA
^RB96,8,3,3,20,24,38^FS
^FO50,50^A0N,40^FN0^FS
^FN0^RFR,E^FS
^XZ
The resulting label would look like this:
