Omron V680S-HMD64-EIP User Manual page 97

 Repeat
When the Reader/Writer receives a command execution request from the host device, it automatically
detects RF Tags in the communications field and communicates with them. This process is repeated
until the execution request is cleared.
Communications are not performed for RF Tags that have returned communications results to the host
device until the Reader/Writer has to communicate with another RF Tags.
You can use this specification to perform communications with RF Tags in order as they move past the
Reader/Writer. However, if there is more than one RF Tag in the communications field of the Antenna
at the same time, normal communications will not be possible. Make sure that there is never more than
one RF Tag in the communications field of the Antenna at the same time.
RF Tag
Reader/Writer
Host device Reader/Writer
Host device Reader/Writer
Reader/Writer RF Tag
RF Tag operation
When the communications option is "Repeat", no notice (error response) is sent to the host device even if an RF Tag
missing error or communications error occurs.
Refer to Time Charts in Section 7 Host Communications Specifications for details of Time charts of each communications options.
p.184
Communications start when the RF
Tag enters the communications field.
Repeat communications
Response
Communications processing
Waiting for RF Tag Waiting for RF Tag
RF Tag A RF Tag B
Response Response Processing completed.
Waiting for RF Tag
RF Tag C
Section 6
Functions
RFID System
95
User's Manual
(EtherNet/IP TM )