User's Manual

December 6, 2006 Proprietary Information 35
Revision 1.0
4.6.4.1 READ Sub-Command Status Message
The READ sub-command status message contains the
following message format:
Figure 22 READ Sub-Command Status Message Format
Table 21 READ Sub-Command Status Field Definitions
Field Definition
STATUS
CODE
This field should be set to IN_PROGRESS
TAG_COUNT The number of tags reported in this message
TAG_ID
A sequence of 1 or more tag IDs. The 2 high order bits of the IDs are
used to determine the number of bits in the tag ID per the EPC
specification.). If either of the first two bits are a “1” then the tag is 64
bits long. If the fifth bit is a “1” and the first two bits are “00” the tag is
64-bits long otherwise if the first two bits are “00” and the fifth bit is
“0”, then the tag is 96-bits long.
If any tags are singulated and read, this command will return
multiple messages. After all tags have been reported, the
reader will send a final summary message to the host.
MSB LSB
Message
Status Response
Status
Code
Tag
Count
Tag Id
0x01
1 byte 1 byte 126 bytes