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5-2
Operation sequence, such as communication to a tag and response return timing, varies depending on the designation with a command.
You need to use properly according to the tag status in an antenna communication area and a type of communication with a host device.
5-2-1 Communication Mode with Command
(1) Trigger
Communication is performed to a tag in an antenna communication area when a command has been received. Therefore, check that the
tag is in the antenna communication area and then execute a command. If there is no tag in the antenna communication area when a
command has been executed, the antenna returns an error response.
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.
Correct Usage
Trigger, check that a tag is in the antenna communication area.
(Host device)
(Antenna)
(Tag)
Not yet
approached
Tag
Trigger command
Command pro-
cess ended
Communication
process
Response
Tag
Sleep or
standby
(1) The host device must check that the tag is
in the antenna communication area and
then execute a command.
(2) The antenna communicates to the tag
according to the command.
(3) When the process has completed, the
antenna returns a response of the process
end to the host device and becomes ready
to accept a command.
5-2 Communication Operation Sequence