5-2 Control Procedures for Each Communication
5-2
5-11
5-2-3 Multiple Access
In Multiple Access, the Reader/Writer can communicate with all of the multiple Tags present
in the antenna communication area. In I.CODE1 Mode, the Tag code corresponding to the
number of Tags present in the communication area must be specified. For the Tag number
specifications, refer to SECTION 5-2-5.
When the Tag is on the boundary of the communication area or enters the communication area
more than once because of swing, the normal operation may be interrupted because the Tags
are processed more than once. In this case, it is recommended that UID/SNR addition setting
be enabled to evaluate the Tags on the host side. In addition, one processing per Tag is
available by enabling the Duplicate Communication Protecting Function. For Duplicate
Communication Protecting Function,, refer to SECTION 3-8.
5-2-3-1 Multiple Trigger Mode
Read Command (RD)
Write Command (WT) with UID/SNR addition setting enabled (Excluding I.CODE1 Mode).
At the reception of the command, the Reader/Writer communicates with all the Tags in the
communication area and returns communication results with each Tag, as responses. After
communicating with all the Tags, it returns Detection End Response (Response Code: 72). When no Tag is
present in the communication area, it returns to Detection End Response (Response Code: 72).
In I.CODE1 Mode, when the Reader/Writer could not communicate with all of the detected tags or when it
detected non-processable Tags during the processing sequence, it returns a warning code (Code: 0
□
) as
Response Code. (Refer to SECTION 5-3-7-2).
（タグ）
（リーダライタ）
レスポンス受信
レスポンス受信
レスポンス受信
レスポンス受信
（上位機器）
タグ接近待ち
④タグがＲ／Ｗアンテナの交信領域内にあるとコント
ローラはタグと交信を行います。
①リーダライタがコマンドを受信します。
マルチリードコマンド
（UID 付加設定）
レスポンス(UID1）
タグ(UID1)
タグ検出
レスポンス(UID2)
タグ(UID2)
タグ検出
レスポンス(UID3)
タグ(UID3)
終了レスポンス”７２”
⑤信領域内の全てのタグとの交信が終了した時点
で、終了レスポンスを返します。
③
レスポンスに UID を付加してレスポンスを返します。
②
リーダライタはタグとの交信処理を行います。
(Host)
(Reader/Writer)
(Tag)
Waits for a Tag to approach
Receives a response
Receives a response
Receives a response
Receives a response
Tag (UID1)
Tag (UID2)
Tag (UID3)
Response (UID1)
Response (UID2)
Response (UID3)
Tag Detection
Tag Detection
Detection End Response 72.
(5)After communicating with all the Tags
in the communication area, the
Reader/Writer returns Detection End
Response.
(3)Adds UID to the response and
returns the response.
(2)The Reader/Writer communicates
with the Tag.
(1)The Reader/Writer receives a
command.
(4)When a Tag is present in the
Reader/Writer antenna communication
area, the Reader/Writer communicates
with the Tag.
Multi-Read Command
（
UID addition setting
）
