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5-2 Communication Operation Sequence
5-3
(2) Single Auto
An antenna waits until a tag approaches the communication area and then communicates with the tag.
To terminate Single Auto:
•
When an auto repeat cancel command (C2) is issued, the antenna discontinues Single Auto and becomes ready to accept a command.
•
When any other command is issued, the antenna discontinues Single Auto and executes the new command. If the command format
is wrong, the antenna returns the format error response 14 and discontinues Single Auto.
•
If a waiting time for tag (refer to Section 5-9-4) is set, when the waiting time for tag has been passed, the antenna returns the no-tag
error response 72 and discontinues Single Auto.
When a command is executed, the tag is in a sleep mode or standby mode.
•
Sleep mode (Communication designation SU or SN)
The tag battery power can be saved in the sleep mode. The tag cannot be started in 0.2 seconds immediately after sleep.
•
Standby mode (Communication designation WU or WN)
To execute several commands consecutively to one tag, enable the standby mode.
(Host device)
(Antenna)
(Tag)
Not yet
approached
Single Auto
command
Command pro-
cess ended
Communication
process
Response
Tag
Sleep or
standby
(1)The Single Auto command is sent from
the host device.
(2)The antenna does not return a response
until the tag approaches. So, the host
device waits for a response.
(3)When the tag passes the front of the
antenna, the antenna communicates with
the tag according to a command.
(4)When the process has completed, the con-
troller returns a response of the process
end to the host device and becomes ready
to accept a command.
Not yet
approached
Waits for tag
approaching
Waits for tag
approaching
Pass