3-4
Section
Lock Function
27
Note In FIFO read/write mode, make sure that multiple ID Tags do not arrive in the
communications area together, otherwise a communications error will result and
further communications will not be possible until there is only a single ID Tag in
the communications area.
3-2
Serial Number Read Function
This function reads the ID Tag’s serial number. The ID Tag’s serial number can-
not be overwritten.
Using the Function
1, 2, 3...
1. When the READ command’s first read address and no. of read bytes param-
eters are set to “
****
”, the ID Tag’s 4-byte serial number will be read and
returned in the response.
2. The data type parameter must be set to HEX. A command error will occur if
the data type is set to ASCII.
3. The communications time required for this command is the same as the time
required for standard 1-page read operation.
The serial number is written to the ID Tag’s system area at the factory.
3-3
High-speed Access Function (ID Tags with -Y Suffix Only)
ID Tags with the “-Y” suffix are equipped with a high-speed access function that
reads and writes data at high speed. The high-speed access function can be
used with the READ command and WRITE command only, command connec-
tions cannot be used.
Up to 1 page of data can be read or written to addresses between 00 and 6F Hex.
The communications method must be set to Quick Trigger (QT), Quick Auto
(QA), or Quick Repeat (QR). These communications methods have been added
specifically for the high-speed access function.
The high-speed access function can be used with the V700-D
j
3P
j
1-Y ID
Tags, but the multiple and selective access functions cannot be used.
The following tables compare the communications times required when reading
or writing 8 bytes of data using the high-speed access function and regular ac-
cess function.
Not Synchronous (Reference Values)
Operation
High-speed access
Regular access
Read
66.7 ms
107.4 ms
Write
115.6 ms
166.3 ms
RO Synchronous (Reference Values)
Operation
High-speed access
Regular access
Read
103.4 ms
154.1 ms
RW Synchronous (Reference Values)
Operation
High-speed access
Regular access
Read
115.6 ms
172.4 ms
Write
168.4 ms
225.2 ms
3-4
Lock Function
The lock function can be used to prevent the data in pages 1 to 6 from being
overwritten. Pages are locked independently and a page cannot be released
once it has been locked.
Serial Number Source
Applicable ID Tags
(V700-D
j
3P
j
1-Y)
Communications Times
for Reference
AUDIN - 7 bis rue de Tinqueux - 51100 Reims - France - Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : [email protected]
