Thingmagic M5e-Compact Manuel d'utilisateur télécharger pdf (Page 43)

Tag Buffer

Functionality of the Embedded Modules 43

Tag Buffer Entry

In addition to the tag EPC data each entry contains meta data about how, where and

when the tag was read. When using the G

et Tag Buffer (29h) command you can choose to

get the following tag meta data returned with each tag extracted from the tag buffer:

Total Entry

Size

Field Size Description

18 bytes

(Max EPC

Length = 96bits)

EPC

Length

2 bytes Indicates the actual EPC length of the tag

read. Cannot exceed the Max EPC length

setting.

PC Word 2 bytes Contains the Protocol Control bits for the tag.

EPC 12 bytes Contains the tag’s EPC value padded with

trailing zeros if the size is less than the Max

EPC Length size.

Tag CRC 2 bytes The tag’s CRC.

68 bytes

(Max EPC

Length = 496bits)

EPC

Length

2 bytes Indicates the actual EPC length of the tag

read. Cannot exceed the Max EPC length

setting.

PC Word 2 bytes Contains the Protocol Control bits for the tag.

EPC 62 bytes Contains the tag’s EPC value padded with

trailing zeros if the size is less than the Max

EPC Length size.

Tag CRC 2 bytes The tag’s CRC.

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 251 252

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Thingmagic M5e-Compact Manuel d'utilisateur Page 43