Omron V680S-HMD64-EIP User Manual page 96

Section 6
Functions
 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.
Host device
Host device
Reader/Writer
RF Tag operation
Refer to Time Charts in Section 7 Host Communications Specifications for details of Time charts of each communications options.
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 Auto
The Reader/Writer automatically detects an RF Tag and communicates with it.
After the host device sends the command, the Reader/Writer automatically detects an RF Tag that
enters the communications field and communicates with it.
RF Tag
Host device
Host device
Reader/Writer
RF Tag operation
Refer to Time Charts in Section 7 Host Communications Specifications for details of Time charts of each communications options.
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RFID System
94
User's Manual
(EtherNet/IP TM )
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
RF Tag
communications error occurs, an error is detected
according to the nature of the error.
Reader/Writer
Reader/Writer Once communication
Reader/Writer
RF Tag
The Reader/Writer communicates with any RF Tag that
enters the communications field and returns the result to
the host device. Then the Reader/Writer waits for
another command.
Reader/Writer
Auto communications
Reader/Writer
RF Tag
Response
Communi c ati o ns processi n g
RF Tag
Response
Communications
processing
Waiting for RF Tag
RF Tag
Processing completed.
Processing completed.