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49
Heat-resistive RFID System
User's Manual
S
e
c
tion 4
Ta
g Ope
ra
tion a
nd Comma
nd Sta
tu
s
Section 4
Reading from/Writing to Tags
Polling Function
With normal AUTO commands, the Controller does not return a response while the Tag is not in range,
i.e., the communications path with the host device is busy.
With a POLLING AUTO command, however, the Controller returns a response if a request is received
from the host device. Therefore, the communications path does not continue to remain in busy status.
(1) A POLLING AUTO command is sent to the
Antenna.
(2) After receiving the command, the Controller
immediately returns a response indicating that
the command was received.
(3) The host device can send subcommands to
request to proceed with processing, or abort
polling auto processing.
(4) If the Tag is not in range, an out-of-range
response will be returned for the subcommand
request.
(5) Read or write processing is performed when
the Tag passes in front of the Read/Write
Antenna.
(6) After processing is completed, the Controller
returns a response with the processing results
to the host device for the request
subcommand.
Subcommand
Subcommand
(Request to Antenna)
(Request to Antenna)
(Antenna not in range)
(Antenna processing
completed)
Response
Response
Tag
Passed
(Host device) (Controller) (Tag)
Not in range
Not in range
(Antenna)
(Antenna)
(Antenna)
Response
Read/write
processing
POLLING AUTO
command