User's Manual

3-2 Communication Modes
3-2
3-3
This Reader/Writer has five communication modes to be selected by each
command corresponding to the number and/or state of Tags in the
communication area.
Each mode is activated by specifying the communication in the command
data.
3-2-1 Single Access
Single Access is used to read data from or write data on the only Tag that
exists in the Antenna Communication Area. 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.
Be sure to have only one Tag in the communication area. Multiple Tags in
the Antenna Communication Area prevents the antenna from
communicating normally.
：In the I.CODE1 Mode, the Tag is processed only once at the entry
into the communication area. It can be reprocessed once it is
outside the area again.
3-2-2 FIFO Access
FIFO Access is used to read data from or write data on the Tags
sequentially in the same order they entered the antenna communication
area. (FIFO First In First Out).
The execution timing can be selected from Trigger, which executes
immediately, Auto, which waits for the Tags to enter the communication
area and executes, or Repeat, which continues to wait for the Tags to
enter the communication area.
Since every Tag finished with communications is set to access prohibit,
communications will be possible if only one Tag newly arrives in the
communication area of the Antenna where more than one Tag exists.
An error results, however, if two or more Tags arrive in the
communications area simultaneously. Once an access-prohibited Tag
leaves the communications area, access to the Tag is enabled again.