turck TBEN-L4-4RFID-8DXP, Instructions For Use Manual, Page: 109 / 242

V02.00 | 2020/08
109
8.8.2 Command: Inventory
The Inventory command causes the read/write head to search for tags in the detection range
and read the UID, EPC of the tags, or if activated in the UHF read/write head, the RSSI. The In-
ventory command can be executed in single-tag mode and in multitag mode. NEXT mode is
only possible in single-tag mode.
NOTE
The command code for fast processing with the loop counter is 0x2001 (hex.) or
8193 (dec.).
Request
Loop counter See description of the output data, [
}
99]
Command code 0x0001 (hex.), 1 (dec.)
Read/write head address See description of the output data, [ } 99]
Length UID/EPC Not required
Start address 1: Grouping of the EPCs active (only UHF)
0: Grouping of the EPCs inactive (only UHF)
Length 0: The actual length (bytes) of the transferred UID or EPC is
transferred with an inventory.
> 0 in HF applications:
n
8: Return message 8 bytes UID
n
1…7: Return message of an abbreviated UID
n
> 8: Error message
> 0 in UHF applications: EPC completely output.
-1: NEXT mode (only available in HF single-tag applications):
An HF tag is always only read, written or protected if the UID
is different to the UID of the last read or written tag.
Command timeout See description of the output data, [
}
99]
Write fragment no. 0
Read fragment no. See description of the output data, [ } 99]
Write data Not required
Response (HF)
Loop counter See description of the input data, [ } 93]
Response code 0x0001 (hex.), 1 (dec.)
Length Length of the read data in bytes
Error code See description of the input data, [ } 93]
Tag within the
detection range See description of the input data, [ } 93]
Data (bytes) available See description of the input data, [
}
93]
Tag counter Ascending
Write fragment no. 0
Read fragment no. See description of the input data, [ } 93]
Read data, Bytes 0…n UID