Command Identifier 0X60: Fast Tag Identification - Balluff BIS U-4A7-082-01C-07-S4 Betriebsanleitung

BIS U-4A7-082- _1C-07-S4
Industrial RFID system - Read/write head
8
System integration (continued)
8.7.16 Command identifier 0x60: Fast tag
identification
The fast tag detection command is able to read the first or
last 28 bytes of a tag ID (EPC or TID). If multiple tags are in
front of the read head, a status code is returned and
additionally indicated by the Multiple Tag Flag.
In addition, the RSSI of the corresponding tag is
transmitted.
All data is returned in the response buffer in a single cycle
after the command execution, the use of toggle bits TI and
TO is not necessary.
Command:
Subaddress Meaning
0x00 1st bit string
0x01 Command
recognition
0x02 Command
recognition
0x03 Selection of
relevant
bytes
0x04 Byte order
... None
0x1F 2nd bit
string
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Functional description
0x60: Fast tag
identification
EPC (0) or TID (1)
Output byte of the highest
address (0) or
Output byte of the lowest
address (1),
if the number of EPC/TID
bytes is greater than 28.
Selection of how the bytes
should be returned:
0 = standard, low byte first
1 = alternative, high byte
first
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.
If there is no more than one tag in front of the read head,
the response looks like this:
Response:
Subaddress Meaning
0x00 1st bit string
0x01 Number of
bytes
0x02 Selection of
relevant
bytes
0x03 Data
... ...
... Data
0x1F 2nd bit string If the 1st and 2nd bit
If there are multiple tags in front of the read head, a status
code for multiple data carriers is returned. In addition, the
MT (Multiple Tag) and CP (Code Present) flags are set to
active. All other status codes are also transferred in the
response.
Subaddress Meaning
0x00 1st bit string
0x01 Status code
... None
0x1F 2nd bit string If the 1st and 2nd bit
Functional description
Number of bytes
transferred. If this number
is equal to 28, further ID
data may be available on
the tag, which cannot be
reached with this
command.
28 bytes from highest
address are output (0)
or
28 bytes from lowest
address are output (1)
EPC/TID highest address,
of the respective selected
block or highest address
of the data, if length of
the total data is shorter
than 28 bytes.
...
EPC/TID lowest address.
If the length of data
exceeds 28 bytes, data
will be truncated from
here on.
strings match, valid data
is present.
Functional description
Provides information
about the status of a
request.
No meaning
strings match, valid data
is present.
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