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Single, FIFO, Multiple, and Selective Access Functions
Multiple Access Mode
Selective Access Mode
This function is also called 1:N access or multiple Tag simultaneous access.
In this mode, communications with multiple Tags in the communications area
will be possible.
Set the maximum number of Tags (number of timeslots) within the
communications area (hereafter called the Tag number setting) using a
command. Refer to 5-7 Tag Number Setting for details.
Set Selective Access Mode when performing communications only with a
specific Tag out of multiple Tags in the communications area. In this mode, a
Tag Detection Command can be used to assigning numbers to Tags within
the communications area and a Tag Designation Command can be used to
communicate with a specified Tag based on the assigned numbers.
Set the maximum number of Tags (number of timeslots) using a command in
the same way as for Multiple Access Mode.
Note 1:
When using FIFO Access Mode, do not allow multiple Tags to enter the
communications area at the same time. If multiple Tags enter the
communications area at the same time, a communications error will
occur, and communications will be disabled until there is only one Tag in
the communications area.
Note 2:
Be sure to set the Tag number setting in the access mode in use
(Multiple Access Mode or Selective Access Mode) when using multiple
Tags within the communications area. The maximum number of Tags
setting is decided beforehand by the maximum number of Tags possible
in the communications area. Refer to 5-7 Tag Number Setting for details.
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Section 3-1
3-3
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