Omron V680S Series User Manual page 34

Section 2
Names and Functions of Components
 Auto
The Reader/Writer automatically detects an RF Tag and communicates with it.
After the host device sends the query, the Reader/Writer automatically detects an RF Tag that enters
the interrogation zone and communicates with it.
RF Tag
Host device
Host device
Reader/Writer
RF Tag operation
 FIFO Trigger
After communicating with an RF Tag, access to that RF Tag is prohibited. The Reader/Writer sends a
response to the host device and then waits for another query.
The Reader/Writer communicates in turn with each of the RF
Tags that enters the interrogation zone. If two RF Tags enter
the interrogation zone at the same time, a collision occurs,
resulting in an RF Tag communications error.
RF Tag
Host device
Host device
Reader/Writer
RF Tag operation
RFID System
32
User's Manual
The Reader/Writer communicates with any RF Tag that
enters the interrogation zone and returns the result to the
host device. Then the Reader/Writer waits for another
query.
Reader/Writer
Reader/Writer
Auto communications
Reader/Writer
RF Tag
FIFO trigger
Reader/Writer
communications
Reader/Writer
RF Tag
Response
Communications
processing
Waiting for RF Tag
RF Tag
Reader/Writer
Response
Communications
processing
RF Tag
Indicates that access is prohibited.
Processing completed.
Processing completed.