Abx Standard - Command Packet Structure; Abx Standard - Response Packet Structure; Table 6-5: Abx Standard - Command Packet Structure; Table 6-6: Abx Standard - Response Packet Structure - EMS COBALT C0405 Series Operator's Manual

6 . 3 . 1
A B x S t a n d a r d - C o m m a n d P a c k e t S t r u c t u r e
C O M M A N D P A C K E T E L E M E N T
COMMAND HEADER:
0xAA is always the MSB of the first word of an ABx
Standard command.
COMMAND ID:
The command ID is always the LSB of the first word
and indicates the RFID command to execute.
START ADDRESS:
This two-byte parameter indicates the location of tag
memory where a read or write operation shall begin.
READ/WRITE LENGTH:
This two-byte parameter represents the number of
bytes that are to be retrieved from or written to the
RFID tag.
TIMEOUT VALUE:
This two-byte integer indicates the maximum length of
time for which the controller will attempt to complete
the command. Measured in milliseconds, this value
can have a range of 0x0001 to 0xFFFE or between 1
and 65,534 msecs (0x07D0 = 2000 x .001 = 2
seconds).
ADDITIONAL DATA:
This parameter uses two bytes to hold a single
character (data to be written to the tag is included in
the LSB only, MSB = 0x00).
TERMINATOR:
Double-byte command packet terminator
6 . 3 . 2
A B x S t a n d a r d - R e s p o n s e P a c k e t S t r u c t u r e
R E S P O N S E P A C K E T E L E M E N T
RESPONSE HEADER:
0xAA is always the MSB of the first word of an ABx
Standard response packet
COMMAND ECHO:
The command echo is always the LSB of the first word
and indicates the RFID command that was executed.
ADDITIONAL DATA:
This parameter uses two bytes to hold a single
character of retrieved data (data is returned in the LSB
only, MSB = 0x00).
TERMINATOR:
Double-byte command packet terminator
C 0 4 0 5 - X X X - 0 1 O P E R A T O R ' S M A N U A L – R E V . 0 3

Table 6-5: ABx Standard - Command Packet Structure

Table 6-6: ABx Standard - Response Packet Structure

C H A P T E R 6 : C O M M A N D P R O T O C O L S
C O N T E N T
0xAA
0x06
(Write Data)
0x0000
0x0001
0x07D0
0x00, 0x00
0xFF, 0xFF
C O N T E N T
0xAA
0x06
(Write Data)
0x00, 0x00
0xFF, 0xFF
P A G E 6 0 O F 7 5
B Y T E
C O U N T
1
1
2
2
2
2 (or more when
applicable)
2
B Y T E
C O U N T
1
2
2 (or more when
applicable)
2