Omron V780 Series, Руководство пользователя

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6 Functions
6 - 12 UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
• 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.
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).
Target level
RF Tag A
RF Tag B
RF Tag C
RF Tag D
When the communications command from
the host device is executed, the RF Tag
with the highest target level is selected
and communications are performed.
Time
Host device
Reader/Writer
RF Tag movement
Communications command
RF Tag A
Response
“Focus” communications Idle: Monitoring RF Tags Idle: Monitoring RF Tags
Timeout
RF Tag A
RF Tag B RF Tag C
RF Tag A
RF Tag B RF Tag C
RF Tag A
RF Tag B RF Tag C
Host device
Reader/Writer
RF Tag movement
Communications command
Response
Idle: Monitoring RF Tags
Timeout
“Focus” communications
RF Tag missing error