User's Manual

5-2 Control Procedures for Each Communication
5-2
5-17
■ Selective Access Operation: In I.CODE1 Mode
■ Exception（In I.CODE1 Mode）
1) When the Tags with the temporary numbers selected by the Tag Selection Command are not present,
the Reader/Writer returns a communications error (Response Code:72) to the host.
2) When the Tag Selection Command selects temporary numbers other than those stored by the
Reader/Writer by the Tag Detection Command, the Reader/Writer returns a format error (Response
Code:14) to the host.
3) The Reader/Writer cannot communicate with the tag which a Temporary number is assigned by the host,
once the Tag goes out of communication area while the Reader/Writer selecting the tag to be read,
even if the Tag exists in the communication area, Then the Reader/Writer sends back to "No Tag error
command (Response Code72)"to the host.
Tag Detection Command (RD)
(Host)
(Reader/Writer)
(Tag)
Communications process Tag (0)
Holds a response
Receives a response
Receives a response
Receives a response
Communications process
Tag (1)
Detection End Response “72”
Specifies a Tag (2)
Communications process Tag (2)
Response from Tag (2)
Stop command
R
emoves
th
e s
t
ore
d
t
emporary
numbers
Holds a response
A response which is held
Returns (with Temporary No.)
Receives a response
(1) Reader/Writer receives a command
(2) The Reader/Writer communicates with the Tag;
it Adds a temporary number to the response and
stores it within the Reader/Writer.
(3) On completion of communications with all of the Tags
existing in the R/W communications area.
It Returns in sequence the responses containing
temporary numbers
(4) On completion of responding to all of the Tags, it
returns the Detection End Response (72).
(5) The Reader/Writer
receives a Tag Selection
Command containing the
temporary number
corres
p
ondin
g
to the Ta
g
(6) The Reader/Writer
communications with the
Ta
g
with the s
p
ecified
(7) On receiving the Stop Command, the
Reader/Writer removes the stored temporary
numbers.