EMSA HS500E Benutzerhandbuch
C H A P T E R 3 : R F I D C O M M A N D S
3 . 1 . 2 R e s p o n s e
P a c k e t S t r u c t u r e Ta b l e
W o r d
#
#
M S B
L S B
D e s c r i p t i o n
01
00
06 (+
number of
returned
data words,
if any)
number of
returned
data words,
if any)
OVERALL LENGTH:
The first word in a response packet is the Overall
Length. This 2-byte value indicates the total
number of words in the response (including this -
the Overall Length field). Length will always be at
least six words (0x0006).
The first word in a response packet is the Overall
Length. This 2-byte value indicates the total
number of words in the response (including this -
the Overall Length field). Length will always be at
least six words (0x0006).
2
(RF
Error)
Error)
(Command
Echo / Error
Code)
Echo / Error
Code)
RF ERROR
COUNTER:
COUNTER:
The MSB of the second
word holds the single-
byte RF Error Counter.
This value identifies the
number of times RF
transmission failed or
could not be completed
for this command.
word holds the single-
byte RF Error Counter.
This value identifies the
number of times RF
transmission failed or
could not be completed
for this command.
COMMAND ECHO /
ERROR CODE:
ERROR CODE:
The Command Echo is
returned in the LSB and
displays the Hex value
of the executed
command.
returned in the LSB and
displays the Hex value
of the executed
command.
When an error occurs,
the LSB will hold a
single byte Error Code.
the LSB will hold a
single byte Error Code.
03
(IC)
(Node ID
Echo) 0x01
Echo) 0x01
INSTANCE COUNTER:
The MSB of word 03
contains the Instance
Counter. This single-
byte value is
incremented by one
following each response
(range = 0x00 to 0x7F).
Cycling power to the
unit resets this counter
to 0x00.
contains the Instance
Counter. This single-
byte value is
incremented by one
following each response
(range = 0x00 to 0x7F).
Cycling power to the
unit resets this counter
to 0x00.
NODE ID ECHO:
The LSB of the third
word, Node ID Echo,
retrieves the Node ID of
the antenna that
executed the command
(this value will always be
0x01 for the HS500E).
word, Node ID Echo,
retrieves the Node ID of
the antenna that
executed the command
(this value will always be
0x01 for the HS500E).
04
(RFT1) (RFT2)
RF TIME:
Word 04 of a response packet contains the RF
Time. This two-byte value indicates the portion of
the Timeout Value (set in the Command Packet)
that remains after the completion of the command
(see Total Time below).
Time. This two-byte value indicates the portion of
the Timeout Value (set in the Command Packet)
that remains after the completion of the command
(see Total Time below).
RF TIME = (TIMEOUT VALUE - TOTAL TIME)
H S 5 0 0 E – O P E R A T O R ’ S M A N U A L
P / N : 1 7 - 1 3 0 5 R E V 0 2 ( 1 2 - 0 5 )
P A G E 2 3 O F 8 2