Command Identifier 0X42: Read Epc - 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)
8.7.6

Command identifier 0x42: Read EPC

Reads the EPC of a data carrier that is within the detection
range of the antenna of the read/write head.
If there are several data carriers in the detection range, the
desired data carrier must be selected before reading
(command identifier 0x40, see chapter 8.7.4 on
page 47).
Subaddress Meaning
0x00 1st bit string
0x01 Command
recognition
... None
0x1F 2nd bit
string
If execution is successful, the response is passed to the
input buffer in the following format:
Response:
Subaddress Meaning
0x00 1st bit string
0x01 Number of
bytes
0x02 EPC data
... EPC data
... None
0x1F 2nd bit
string
or
Input buffer: Status message
Subaddress Meaning
0x00 1st bit string
0x01 Status code
... None
0x1F 2nd bit
string
48 english
Functional description
0x42: Read EPC.
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.
Functional description
Number of bytes of the
EPC read.
Transmission of EPC data
that was read from the
data carrier.
Transmission of EPC data
that was read from the
data carrier.
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.
Functional description
Provides information
about the status of a
request:
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.