INfinity 510 Protocol Reference Guide - Sirit

Chapter 6 - Tag Protocol Support
TAG PROTOCOL SUPPORT
EPC1 GEN 2 (ISO-C) PROTOCOL SUPPORT
Protocol Configuration
In order to enable the ISO-C protocol, the setup.protocols variable
must contain the isoc parameter. In general, setup.install_type
and setup.tag_volume will automatically configure the ISO-C
parameters. This section describes how to configure specific ISO-C
parameters for more precise control.
ISO-C Terminology
This section refers to
ISO-C terms defined in
the “EPC Radio-
Frequency Identity
Protocols: Class-1
Generation-2 UHF RFID
Protocol for
Communications at 860
MHz – 960 Mhz”
document, available
from EPCGlobal.
The modem.protocol.isoc.control namespace configures various
protocol level parameters. The following variables are:
cmd_retries
display_tag_ crc
inventory_both_
targets
number_slots_q
max_incr_ slots_q
mem_bank_for_
selection
session_id
inventory_
antenna_switch
use_block_write
Controls how many times each ISO-C command is
attempted quietly before returning an error message.
If true, all tag reports include the CRC bits in the tag_id. If
false, only actual EPC bits are included.
If true, each inventory round toggles tag’s inventory state
between A and B. If false, each round only inventories
tags in the initial query target state to the opposite state.
At beginning of inventory round, this is value of Q (log2
[number of slots])
As inventory round runs, Q is adjusted up or down
dynamically; this variable controls how much larger Q can
grow. Ex: If number_slots_q is 4 and
max_incr_slots_q is 2, then Q is capped at 6.
When select commands are sent, controls the memory
bank used (see Filtering section).
Controls which ISO-C session (S0 through S3) is used for
each inventory round.
If true and slots_restart ≠ 0, reader switches
antennas each time extra Query command is sent.
If true, block writes used (not supported by all tags). If
false, 16 bit writes used (supported by all tags).
select_cmd_ period If non-zero, specifies how many inventory rounds are
performed prior to issuing the select command.
Query_target
Sets initial inventoried flag used in initial query command.
modem.protocol. isoc.control. Allows per antenna settings when set to
enable_per_antenna
true.
modem.protocol. isoc.control.
antenna. .session_id
Antenna port session id when
enable_per_antenna is true.
INfinity 510 Protocol Reference Guide 41