Single, FIFO, Multiple, and Selective Access Functions
Section 3-1
3-3
3-1-3 Multiple 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 5-10 Timeslot Setting for details.
3-1-4 Selective Access Mode
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 assign numbers to Tags within the
communications area and a Tag Designation Command to communicate with
a specified Tag based on the assigned numbers.
Set the maximum number of Tags using a command in the same way as for
Multiple Access Mode.
Note
•
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.
•
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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