User's Manual

V740 RFID READER/WRITER, ANTENNA 2005-07, REV.01
OPERATION MANUAL
23 of 45 ©OMRON CORPORATION 2005
2.2.1 Client Software
Requests/Functionality
2.2 Event/Query Protocol
The client software can control the reader using RQL
via TCP connection and can acquire data from the
readers in two modes: 1) by requesting specific data
or 2) by automatically receiving events. The two
modes are discussed in further detail in the following
subsections.
The client software is able to make the following
requests of a reader:
• Read IDs of all tags within range of all antennas.
• Read IDs of all tags within range of a given
antenna.
In order to keep the protocol comprehensive and easy
to use, we specify a small set of commands that allow
the client software to fully configure the readers and
exploit their capabilities.
• Read IDs of all tags within a certain subset of tag
IDs within range of all antennas.
• Read IDs of all tags within a certain subset of tag
IDs within range of a specific antenna.
This minimal set of commands includes the ability to
request reads based on several relevant criteria (for
example, group reads, range reads, reads by prefix,
and so on). The ability to reset the reader database
and other control capabilities are also provided.
• Read Individual tag IDs within range of a certain
antenna or all antennas.
• Read only the IDs of tags communicating a given
RF communication protocol.
• Return the number of times a given tag was read
per query.
2. Tag population/general query is made
id protocol
id
antenna
id
read
count
0x1234 EPC1 2 1
1. Query
id
protocol_id
antenna_id
read_count
RQL Engine
V740 Reader/Writer
0xABCD
EPC0
1
2
3. Reply
0x1234
EPC1
2
1
Client PC
• Read IDs from a variety of tag protocols
•
Write IDs to a tag from a variety protocols as they
are supported.
•
Register any commands as aliases (cursor) to the
V740 reader.
• Execute any aliases (cursor) one time
• Execute any aliases (cursor) repeatedly at the
indicated interval.
•
Execute any aliases (cursor) repeatedly in the
specified term.
Figure 1 : Conceptual diagram of control flow