User Manual

CHAPTER 6: COMMAND PROTOCOLS
COBALT HF RFID CONTROLLERS OPERATOR’S MANUAL
P/N: 17-1320 REV 01 (03-06) PAGE 62 OF 116
6.2.3 ABx Fast - Response Packet Structure
After performing a command, the Cobalt HF will generate a host-bound response
message. ABx Fast responses contain a Response Header, a number of response
values (or retrieved data bytes), and a Terminator.
RESPONSE PACKET PARAMETER CONTENT SIZE
RESPONSE HEADER:
The first two bytes of an ABx Fast response packet.
0x02, 0x02 2 bytes
RESPONSE SIZE:
This 2-byte integer defines the total number of bytes in
the response packet (excluding Header, Response
Size, Checksum and Terminator).
0x0001 2-byte integer
COMMAND ECHO:
The single-byte Command Echo parameter reiterates
the Hex value of the command for which the response
packet was generated.
0x06 1 byte
RETRIEVED DATA:
This parameter is used to hold one or more bytes of
data that was requested by the command (when
applicable).
Data
1 or more bytes
(when
applicable)
CHECKSUM:
This optional parameter holds a single-byte checksum
(only applicable when using ABx Fast with
Checksum).
Optional
1 byte
(when
applicable)
TERMINATOR:
Single-byte response packet terminator:
0x03 1 byte
Table 6-2: ABx Fast - Response Packet Structure