Thingmagic M5e-Compact Bedienungsanleitung Seite 115

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Seitenansicht 114
Application Tag Commands
Command Set 115
A 64-bit tag has the length set to 0x60 (16-bit PC + 64-bit tag EPC + 16-bit tag CRC),
but only the first 12 bytes of the tag record is filled in, the trailing bytes, after the CRC
are padded with zeros.
An 96-bit GEN2 tag, the length is 0x80 (16-bit PC (Protocol Control) word + 96-bit tag
EPC + 16-bit tag EPC CRC).
In the response below, two tag EPCs are returned. Tag #1 is a 96-bit EPC tag and tag #2
is a 64-bit EPC tag.
Note
Using this syntax the number of tags in the response is not specified. It must
be determined by the message length.
Get Tag EPCs and Metadata
Using this syntax for getting information from the tag buffer provides several benefits:
When at tag EPC is returned there is no padding if the actual tag EPC is shorter than
the configured max EPC length. This helps minimize the amount of data returned.
Any or all fields of the Tag Read Meta Data can be returned.
FF 24 29 00 00
SO
H
Length OpCod
e
Status
00 80 30 00 11 11 22 22 33 33 44 44 55 55 66 66 18 35
EPC
Length
PC W o rd Ta g E P C Tag C R C
00 60 20 00 11 11 22 22 33 33 44 44 C2 41 00 00 00 00
EPC
Length
PC Word Tag EPC Tag CRC Padding
D3 32
CRC
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