User's Manual

COBALT UHF-SERIES CHAPTER 5: COMMAND PROTOCOLS
PAGE 58 OF 140
5.4.6 ABx Fast - Response Packet Structure
After performing a command, the Cobalt UHF will generate a host-bound response
packet. ABx Fast responses contain a Response Header, Response Size,
Command Echo, one or more Response Values / Retrieved Data (when
applicable), and a Response Terminator.
RESPONSE PACKET ELEMENT CONTENT SIZE
RESPONSE HEADER:
The first two bytes of an ABx Fast response packet
0x02, 0x02 2 bytes
RESPONSE SIZE:
This two-byte integer indicates the total number of
bytes in the response packet (excluding Response
Header, Response Size, Checksum and Terminator).
0x0001 +
(number of bytes
of retrieved data)
2-byte integer
COMMAND ECHO:
This single-byte parameter reiterates the Hex value of
the command for which the response packet was
generated.
0x06 1 byte
RESPONSE VALUES / RETRIEVED DATA:
This parameter is used to hold one or more bytes of
the 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)
RESPONSE TERMINATOR:
Single-byte response packet terminator (always 0x03)
0x03 1 byte
Table 5-10: ABx Fast - Response Packet Structure