User guide

Speedway Reader IPJ-R1000 for Gen 2 UHF RFID
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Figure 5-1 Operation
5.2. Tag Filters
The Inventory Filter screen (see Figure 5-2) is the user interface to the Select command, which the reader may apply
successively to sort a particular tag population based on user-defined criteria, which may include union, intersection, and
negation-based tag partitioning (union and intersection operations are performed by issuing successive Select commands).
Select commands apply to a single memory bank; the MemBank field specifies if the criteria applies to the TID, EPC, or user
memory, as follows:
MemBank 00 (0): Reserved
MemBank 01 (1): EPC
MemBank 10 (2): TID
MemBank 11 (3): User
Successive Selects may apply to different memory banks. The Bit Offset and Bit Length fields are used to target a specific
portion of the tag memory on which to perform the filtering, while the Pattern field contains the comparison bits of interest.
As tags are read, the pattern is evaluated against the Select criteria, which includes Equal and Not Equal options in the
Comparison field.
The Inventory Filter allows the use of two sets of criteria (defined by primary filter A and secondary filter B) that may be
used separately, jointly, or not at all (the pull-down options include No Filter, A ONLY, A AND B, A OR B). When applied to
an inventory round, only those tags that match the Select criteria will be displayed.