Omron V740-BA50C22A-US Operation Manual page 34

The antenna arbitration algorithm is optimized to
maximize the read rate of all the tags in the field. The
time division for each antenna is determined
automatically by the reader and cannot be specified
by the user.
e.g. if 10 EPC1 tags takes 20 ms per tag on
average. With two antennas:
minimum time_out =
10 x 20 x 2 x 2 = 800 ms.
Note: It is caused by the following reasons that the
difference between the time_out value and actual time
required for reading.
It spends 20 ms to switch protocols.
The max of the difference can be calculated by
summing up the time caused by the reasons. You
need consider time lag to avoid mutual interface due
to time sharing.
V740 RFID READER/WRITER, ANTENNA
OPERATION MANUAL
34 of 56
2005-09, REV0.1
©OMRON CORPORATION 2005