Omron V780-Series User Manual page 84

6 Functions
Target level
• One or More RF Tags in the Communications Range
After the Reader/Writer selects an RF Tag in the communications range, it returns the response
without waiting for a timeout.
Host device
Reader/Writer
RF Tag movement
RF Tag B RF Tag C
Additional Information
The behavior of the RF Tag that has communicated once with the Reader/Writer depends on
the Gen2 session setting in the advanced RF communications settings. For details, refer to
Gen2 Session on page 6-26.
• No RF Tag in the Communications Range
When the Reader/Writer does not detect a target RF Tag in the communications range, it waits for
a timeout and then returns the communications results (RF Tag missing error).
Host device
Reader/Writer
RF Tag movement
6 - 12
RF Tag D
RF Tag A
Communications command
Idle: Monitoring RF Tags
RF Tag A RF Tag A
RF Tag B RF Tag C
Communications command
Idle: Monitoring RF Tags
UHF RFID System V780-series Reader/Writer User's Manual (EtherNet/IP
When the communications command from
the host device is executed, the RF Tag
with the highest target level is selected
and communications are performed.
RF Tag C
RF Tag B
Response
"Focus" communications Idle: Monitoring RF Tags
RF Tag A
Timeout
"Focus" communications
Time
Timeout
RF Tag A
RF Tag B RF Tag C
RF Tag missing error
Response
TM
) (Z402)