Id Write - Writing Data To Tag - Omron V740-BA50C22A-US Operation Manual

2.2.4.2 ID Write – Writing data to tag
The UPDATE command is used to write new data
to a tag. The structure of an UPDATE command is
as follows:
UPDATE table_expression set_specification
where_specification;
table_expression and entries specified in
set_specification are provided in Table 3.
A table_expression is specified by only one table
name:
UPDATE tag_id
A set_specification is entered as:
SET entry=value
A where_specification is entered as:
WHERE boolean_expr
In a where_specification, both protocol_id and
antenna_id must be specified.
The tag_id (tag data) is returned with a check code
as follows:
EPC1:[check_code][tag_id]<LF><LF>
The 'where_specification' is specified in the same
manner as the SELECT in the previous section.:
Table3 : Reader Internal Tag Data
Table Schema -Tag Write
Keyword Entry
UPDATE tag_id
SET id
WHERE antenna_id
protocol_id
V740 RFID READER/WRITER, ANTENNA
OPERATION MANUAL
Table Arguments
- -
tag_id Hex String
tag_id Int
tag_id String
36 of 56
•
Example : To write tag data(tag_id) to a 64-bit
EPC tag:
UPDATE tag_id SET id=0x1234567890ABCDEF
WHERE protocol='EPC1' AND antenna_id=1;
The reader returns the tag_id if the write
operation was successful.For example the
response is as follows:
0xCE851234567890ABCDEF<LF><LF>
In this case, "CE85" is the check code.
"1234567890ABCDEF" is tag data(tag id).
If the operation failed, "Error 0102: Error
performing query<LF><LF>" returned.
Note: The format of the tag data in the command
must much the selected protocol or an error will
result.
For example :
- A 64 bit EPC1 tag requires 16 hexadecimal digits
- A 96 bit EPC1 tag requires 24 hexadecimal digits
(See section 1.6)
If wrong data is written to the tag, the tag may be
unreadable. In this case, write correct tag ID again,
after that, the tag would turn to be readable.
Range Example
Value
- -
- 0xFEDCB
A0987654
321
[1...4] 1
'EPC1' 'EPC1'
Comments
The name of the
internal tag data
table(fixed)
Specifies the tag
id(tag data) to be
written
Specifies the
antenna used to
read a tag
Specifies the
protocol used to
read a tag.
Must be uppercase.
2005-09, REV0.1
©OMRON CORPORATION 2005