User Manual

CHAPTER 7: RFID COMMANDS
COBALT HF RFID CONTROLLERS OPERATOR’S MANUAL
P/N: 17-1320 REV 01 (03-06) PAGE 76 OF 116
C OMMAND 05 (READ D ATA)-CBX C OMMAND E XAMPLE
This example instructs the controller to read four bytes of data from a tag starting at
address 0x0001. A Timeout Value of 2 seconds (0x07D0 = 2000 x 1 millisecond
increments) is set for the completion of the command.
Command from Host
PARAMETER FIELD MSB LSB
Overall Length of Command
(in words)
0x00 0x06
AA
in MSB
Command ID
in LSB (0x05)
0xAA
0x05
0x00
in MSB
Node ID
in LSB (Cobalt -IND = 0x01)
0x00 0x01
2-byte
Timeout Value
measured in ms
(0x07D0 = 2 seconds)
0x07 0xD0
Start Address
0x00 0x01
Read Length
0x00 0x04
Response from Controller
PARAMETER FIELD MSB LSB
Overall Length of Response
(in words)
0x00 0x08
AA
in MSB
Command Echo
in LSB
0xAA
0x05
00
in MSB
Node ID Echo
in LSB
0x00 0x01
Month
and
Day
timestamp
Month DOM
Hour
and
Minute
timestamp
Hour Minutes
Seconds
timestamp in MSB
# of Bytes Read Data
in LSB
Seconds 0x04
Read Data
(bytes 1 and 2)
0x01 0x02
Read Data
(bytes 3 and 4)
0x03 0x04