Omron V680S Series User Manual

Section 2 Functions
RF Tag Communications
 Communications Options
Communications with the RF Tag are performed according to one of the communications options that
are listed in the following table.
The setting of the communications option is effective immediately after it is changed. It is saved in
internal memory in the Reader/Writer even after the power supply is turned OFF.
 Once
The Reader/Writer communicates with RF Tags for command execution requests from the host device.
When the Reader/Writer is finished communicating with an RF Tag, it returns the communications
results to the host device and waits for another command.
If there is no RF Tag in the communications field when the Reader/Writer receives the command from
the host device, an RF Tag missing error will occur. It is therefore necessary to use a sensor or other
device to detect the presence of an RF Tag before you request command execution.
Name Description
Once When the Reader/Writer receives a command, it communicates with an RF Tag and returns a
response.
Repeat When the Reader/Writer receives a command, it repeatedly communicates with RF Tags and
returns a response when communicating with an RF Tag was possible. Once an RF Tag has been
communicated with, communications will not be performed for it again as long as it remains in the
communications field.
FIFO Repeat When the Reader/Writer receives a command, it repeatedly communicates with RF Tags and
returns a response when communicating with an RF Tag was possible.
After communicating with an RF Tag once, operation for that RF Tag is stopped. When the Reader/
Writer communicates with an RF Tag, there must be only one RF Tag for which operation is
possible in the communications field. The Reader/Writer will not communicate with the same RF
Tag again.
RF Tag
Reader/Writer
The Reader/Writer communicates with the RF Tag in
the communications field of the Antenna when the
host device sends a command. If there is no RF Tag,
an RF Tag missing error will occur. If an RF Tag
communications error occurs, an error is detected
according to the nature of the error.
Host device Reader/Writer
Host device Reader/Writer
Reader/Writer
RF Tag
RF Tag operation
Once communication
Communications processing
Response
RF Tag
Processing completed.

Omron V680S Series Specifications

General

Brand	Omron
Model	V680S Series
Category	Rfid Systems
Language	English