ThingMagic M5e-Compact - Manual (Page 76)

Application Tag Commands
76 Command Set
parameters as defined by the EPCGlobal Gen2 v1.2 Specification. The current user
controlled options are:
Gen2 Session (User Controlled)
This setting determines which tag inventory flag is altered when a tag responds to a Gen2
Query (each flag has a unique persistence profile, as defined by the Gen2 Specification).
The value of Gen2 Session and Gen2 Target is set using the
Set Protocol Configuration
(9Bh) command.
Select Invert (User Controlled)
This setting is used to determine the Gen2 Action value sent in the Gen2 Select
command. The value of Select Invert is defined using bit 3 of the Select Option field in the
Tag Singulation Fields . The supported values are:
0 (False) - Tags which match the Select criteria are to respond. Set Gen2
Action=0.
1 (True) - Tags which DO NOT match the Select criteria are to respond. Set Gen2
Action=4.
The settings specified for Gen2 Session and Select Invert determine the settings within
the Select command which is sent before the corresponding Gen2 Query and the settings
in the subsequent Gen2 Query(s). These implicit settings used by the Gen2 Select are:
Gen2 Action (defined by Select Invert)
This parameter can be one of 8 values, as defined by the Gen2 specification, which
determine which of 4 possible flag actions (assert, de-assert, negate, or leave alone) will
be done if the criteria matches and, similarly, which of the 4 possible flag actions will be
done if the criteria does not match. Only two values are currently used:
0 - Assert (or put in state “A” for inventory flags) the target flag if there IS a match;
de-assert (or put in state “B” for inventory flags) the target flag if there IS
NOT a match.
4 - Assert (or put in state “A” for inventory flags) the target flag if there IS NOT a
match; de-assert (or put in state “B” for inventory flags) the target flag if
there IS a match