turck TN-UHF AUS-CDS Series, Instructions For Use Manual

Page: 164 / 225

Setting
RFID channels – overview of the commands
164
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8.5.3 Command: Read
The Read command causes the read/write head to read the data of tags in the detection range.
128 bytes are transferred in a read operation by default. Larger data volumes can be transferred
in fragments. If a particular EPC is entered, the read/write head only reads the appropriate tags.
All other tags in the detection range are ignored in this case.
NOTE
The command code for fast processing with the loop counter is 0x2002 (hex.) or
8194 (dec.).
Request
Loop counter See description of the output data, [
}
156]
Command code 0x0002 (hex.), 2 (dec.)
Memory area See description of the output data, [ } 156]
Read/write head address See description of the output data, [
}
156]
Length of EPC Enter EPC size in bytes, if a particular tag is to be read. The
EPC must be defined in the write data (start byte: 0). The
function of the length of the EPC depends on the command
used.
0: No entry of an EPC for executing the command. Only one
tag can be located in the detection range of the read/write
head.
> 0: EPC length of the tag to be read if an EPC is present in
the write data.
Start address Start address of the memory area on the tag to be read
(entry in bytes)
Length Length of the data to be read in bytes
Command timeout See description of the output data, [ } 156]
Write fragment no. 0
Read fragment no. See description of the output data, [ } 156]
Write data, Byte 0…(size of the
EPC – 1) EPC of the tag to be protected
Write data,
Byte (size of the EPC)…127 Not required
Response
Loop counter See description of the input data, [
}
152]
Response code 0x0002 (hex.), 2 (dec.)
Length Length of the read data
Error code See description of the input data, [ } 152]
Tag within the
detection range See description of the input data, [
}
152]
Data (bytes) available Increases during command execution
Tag counter See description of the input data, [ } 152]
Write fragment no. 0
Read fragment no. See description of the input data, [ } 152]
Read data, Bytes 0…n Read data