User's Manual

V750 RFID READER/WRITER, ANTENNA 2006-06, REV.C
OPERATION MANUAL
87 of 110
©OMRON CORPORATION 2006
Note:
Q
A parameter that an Interrogator uses to regulate the probability of Tag response. An Interrogator commands
Tags in an inventory round to load a Q-bit random (or pseudo-random) number into their slot counter; the
Interrogator may also command Tags to decrement their slot counter. Tags reply when the value in their slot
counter (i.e. their slot . see below) is zero. Q is an integer in the range (0,15); the corresponding Tag response
probabilities range from 20 = 1 to 2.15 = 0.000031.
Session
An inventory process comprising an Interrogator and an associated Tag population. An Interrogator chooses
one of four sessions and inventories Tags within that session. The Interrogator and associated Tag population
operate in one and only one session for the duration of an inventory round (defined above). For each session,
Tags maintain a corresponding inventoried flag. Sessions allow Tags to keep track of their inventoried status
separately for each of four possible time-interleaved inventory processes, using an independent inventoried
flag for each process.