User's Manual

3-2 Communication Modes
3-2
3-5
3-2-5 Fast Read Access: I.CODE1 Mode Only
The Fast Read Access speeds up the data readout in I.CODE1 Mode. The
execution timing can be selected from Trigger, which executes
immediately, Auto, which waits for the Tag to enter the communication
area and executes, or Repeat, which repeats the execution for the Tag in
the communication area.
The function operates the same way as in Single Access mode when the
Tag number code is set to 0; in other cases it is the same as in Multiple
Access Mode.
[When the Tag number code is set to 0 (Single Access Mode)]
By selecting the Trigger or Auto execution timing, the function executes
the same operation as that in normal single access mode but in a shorter
period of time.
When the Repeat execution timing is selected, the function continuously
returns data while the Tags are present in the communication area, this
is useful in confirming the communication area.
[When the Tag number code is set to those other than 0 (Multiple Access
Mode)]
The only execution timing available is Repeat, since the function employs
a simple version of the communication sequence, some Tag data may be
unreadable under the condition where the responses from the Tags collide
frequently. In addition, the function processes and responds to the same
Tags repeatedly while they are present in the communication area.
This function should be used when there is a low number of Tags in the
communication area. When there are a greater number of Tags, the
Multiple Access Mode should be used. The Duplicate Communication
Protecting Function is useful to avoid multiple responses returned to the
same Tag. (Refer to SECTION 3-8).
Note:
● For the I.CODE1 Communication Modes used under the conditions, where Multiple Tags exit in the Antenna
Communication Area (Multiple Access, Selective Access, or Fast Read Modes), the Tag Number Code must be
specified. The maximum number of Tags allowed in the communications area is set previously. (Refer to
SECTION 5-2-5 for details).