Setting
RFID channels — overview of commands
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8.8.4 Command: Write
The Write command causes the read/write device to write data to tags in the detection range.
128 bytes are transferred in a write operation by default. Larger data volumes can be trans-
ferred in fragments. If a particular UID or EPC is entered, the read/write device only writes the
appropriate tags. All other tags in the detection range are ignored in this case.
NOTE
With multitag applications enter the UID or EPC of the tag to be written.
NOTE
The command code for fast processing with the loop counter is 0x2004 (hex.) or
8196 (dec.).
See description of the output data, p. [}105].
Request
Loop counter See description of the output data
Command code 0x0004 (hex.), 4 (dec.)
Memory area See description of the output data
Read/write head address See description of the output data
Length UID/EPC Enter UID or EPC size in bytes, if a particular tag is to be writ-
ten. The UID or EPC must be defined in the write data (start
byte: 0). The function of the UID/EPC length is dependent on
the command used.
0: No entry of a UID/EPC for executing the command. Only
one tag can be located in the detection range of the read/
write device.
> 0: EPC length of the tag to be written if an EPC is present in
the write data
-1: NEXT mode: A tag is always only written if the UID/EPC is
different to the UID/EPC of the last read or written tag.
Start address Start address of the memory area on the tag to be written
(entry in bytes)
Length Length of the data to be written in bytes
Timeout See description of the output data
Write fragment No. 1: Use fragmentation
0: Do not use fragmentation
Read fragment No. 0
Write data,
Byte 0…(size of the UID/EPC - 1)
UID or EPC of the tag to be written
Write data,
Byte (size of the EPC)…127
Write data
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