User's Manual

COBALT UHF-SERIES CHAPTER 5: COMMAND PROTOCOLS
PAGE 74 OF 140
5.5.7 CBx Multi-Tag Response Final Termination Packet
Structure
After the RFID controller has issued response packets for each tag identified and/or
read, a final termination packet is generated. Below is the structure of a standard
CBx multi-tag response final termination packet generated by the controller at Node
01.
CBx Multi-tag Response Final Termination Packet Structure
WORD # PACKET ELEMENT MSB LSB
01 Overall Length
: 2-byte integer indicates
the number of “
words
” in the packet.
0x00 0x07
02 0xAA
in MSB,
0xFF
in LSB
0xAA 0xFF
03 Instance Counter: 1-byte value indicates
the number of responses generated by the
Node ID identified in the LSB (this value is
not to be confused with the number of tags
read during a single operation)
Node ID Echo: 1-byte value indicates the
Node ID of the controller that performed
the command.
<IC> 0x01
04 Month and Day Timestamp
<Month> <Day>
05 Hour and Minute Timestamp
<Hour> <Minute>
06 Second Timestamp
in MSB
Additional Data Length:
Single-byte LSB
value indicates the number of additional
bytes retrieved (value will usually = 2, for
Number of Tags Read/Written and
Status)
<Second> 0x02
07 Number of Tags Read/Written
in MSB,
identifies the number of tags read from or
written to during the operation
Status
in LSB (0x00 = operation
completed successfully, 0x07 = Read Tag
ID failed / Tag Not Found)
<N-tags> 0x00
Table 5-17: CBx Multi-Tag Response Final Termination Packet Structure