Command Identifier 0X01: Read Data Carrier - 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)
8.7.2

Command identifier 0x01: Read data carrier

Reading out the data of a data carrier that is located in the
detection range of the antenna of the read/write head. The
memory area to be read is specified via start address,
number of bytes and memory bank.
The memory bank of the memory area to be read can be
set via parameter 0x0085 – subindex 4.
If there are several data carriers in the detection range of
the read/write head, the desired data carrier must be
selected before reading (command identifier 0x40, see
chapter 8.7.4 on page 47).
For the EPC and TID memory areas there are
simplified commands which return EPC and TID
as filtered information, see Command identifier
0x42: Read EPC on page 48 and Command
identifier 0x44: Read TID on page 50.
Details on the use and organization of the
different memory areas can be found in the
UHF-RFID standard EPC
Identity Protocols Generation-2 UHF RFID.
Command:
Subaddress Meaning
0x00 1st bit string
0x01 Command
recognition
0x02 Start
address
(Low Byte)
0x03 Start
address
(High Byte)
0x04 Number of
bytes
(Low Byte)
0x05 Number of
bytes
(High Byte)
0x06...0x1E None
0x1F 2nd bit
string
www.balluff.com
Radio-Frequency
TM
Functional description
0x01: Read data carrier
Start address from which
to read.
Start address from which
to read.
Number of bytes to be
read from start address.
Number of bytes to be
read from start address.
No meaning
If the 1st and 2nd bit
strings match, valid data
is present.
If execution is successful, the response is passed to the
input buffer in the following format:
Response:
Subaddress Meaning
0x00 1st bit string
0x01 Data
... Data
0x1F 2nd bit
string
Depending on the number of bytes to be read, several
BUS cycles may be necessary to transmit the data.
Functional description
Transfer of data read
Transmission of the data
to be read from the data
carrier.
If the 1st and 2nd bit
strings match, valid data is
present.
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