Setting
RFID channels — overview of commands
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07.00 | 2022/09 | 113
8.8.2 Command: Inventory
The Inventory command triggers the read/write device to search for tags in the detection
range and to read the UID, EPC or, if activated in the UHF reader, the RSSI of the tags. 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 rapid processing with the loop counter is 0x2001 (hex.) or
8193 (dec.).
See description of the output data, p. [}105].
Request
Loop counter See description of the output data
Command code 0x0001 (hex.), 1 (dec.)
Read/write head address See description of the output data
Length UID/EPC Not required
Start address 1: Grouping of the EPCs active (UHF only)
0: Grouping of the EPCs inactive (UHF only)
Length 0: The actual length (bytes) of the transferred UID or EPC is
transferred with an inventory.
> 0 in HF applications:
n 8: 8-byte UID feedback
n 1…7: Feedback of an abbreviated UID
n > 8: Fault signal
-1: NEXT mode (only available in HF single-tag applications):
A HF tag is always only read, written or protected if the UID
is different from the UID of the last read or written tag.
> 0 in UHF applications: EPC is output in full.
Timeout See description of the output data
Write fragment No. 0
Read fragment No. See description of the output data
Write data Not required
See description of the input data, p. [}100].
Response (HF)
Loop counter See description of the input data
Response code 0x0001 (hex.), 1 (dec.)
Length Length of the read data in bytes
Error code See description of the input data
Tag in
detection range
See description of the input data
Data (bytes) available See description of the input data
Tag counter Ascending
Write fragment No. 0
Read fragment No. See description of the input data
Read data, bytes 0…n UID
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