V740 RFID READER/WRITER, ANTENNA
2005-09, REV.01
OPERATION MANUAL
48 of 56
OMRON CORPORATION 2005
2.3 Examples
Examples given in this chapter are provided as a
guide for the user in determining suitability and does
not constitute a warranty. Users must verify operation
in their specific environment and application.
2.3.1 Example 1
To read tags attached to cases passed through a gate
on a conveyer, the client software finds tags using 2
antennas. For the example pictured below, the
command is as follows:
SELECT id, antenna_id FROM tag_id
WHERE (antenna_id=1 OR antenna_id=2)
AND protocol_id='EPC1' SET
time_out=500;
Then the reader continues to read tags through the
gate.
2.3.2 Example 2
To read tags and send a response repeatedly every 1
second using one antenna. For the example pictured
below, the command is as follows:
DECLARE query1 CURSOR FOR SELECT id
FROM tag_id WHERE antenna_id=1 AND
protocol_id='EPC1' SET time_out=500;
SET AUTO query1=ON, repeat=1000;
2.3.3 Example 3
To synchronize two readers see the following
instructions.
On Reader 1:
DECLARE cursor_one CURSOR FOR SELECT
id FROM tag_id WHERE
protocol_id='EPC1' SET time_out=300;
SET auto_time cursor_one = '2005-02-
01T13:00:00Z', repeat=1000;
The first reader will start reading for no less than 300
ms at just 13 o’clock, and it will repeat the command
1000ms.
On Reader 2:
DECLARE cursor_two CURSOR FOR SELECT
id FROM tag_id WHERE
protocol_id='EPC1' SET time_out=300;
SET auto_time cursor_two = '2005-02-
01T13:00:00.5Z', repeat = 1000;
The second reader will start reading for no less than
300ms starting at time 0.5 second after 13 o’clock,
and it will repeat the command every 1000ms.
The effect will be that each reader will have a almost
50% duty cycle with each one only active when the
other one is off.
cases
conveyor
antenna 2
antenna 1
tag
antenna 1
Reader 1
Reader 2
Line 1
Line 2
