Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung Seite 282

BIS U-6127-081-1_4-06-ST36
Processor unit
8
007 protocol (continued)
Command identifier 'L': Read data carrier
(<1024 bytes)
Read out data (<1024 bytes) from a data carrier that is
located in the detection range of the specified antenna.
The memory area to be read is specified via
and
numBeR of ByteS memoRy Bank
transferred in unfragmented form in a single data packet.
If there are several data carriers in the detection range of
the specified antenna, the desired data carrier must be
selected before reading (see Command identifier 'z': Select
data carrier (Select) on page 105).
For the memory areas EPC and TID, there are
simplified commands which return EPC and TID
as filtered information, see command identifiers
'O' and 'y'.
Details on the use and organization of the
different memory areas can be found in the
UHF RFID standard EPC
Identity Protocols Generation-2 UHF RFID.
Byte Length Command
element
00 1 Command
identifier (ASCII)
01...06 6 Start address
(ASCII)
07...12 6 Number of bytes
(ASCII)
13 1 Antenna number
(ASCII)
14 1 Memory bank
(ASCII)
15 1 BCC
Status message
Byte Length Command
element
00 1 Status
01 1 Status code
If the status message is positive, data is requested with
<STX>:
Byte Length Command
element
00 1 Control com-
mand
106 english
,
StaRt addReSS
. The requested data are
Radio-Frequency
TM
Value range
'L'
"000000"...
"999999"
"000000"...
"999999"
'0': All active
antennas
'1'...'4': Single
antenna
'R': Reserved
'E': EPC
'T': TID
'U': USER
00 ...FF
hex hex
Value range
<ACK> or
<NAK>
See table Status
codes on page
94
Value range
<STX>
If the command is executed successfully, the requested
data follows with the specified number of bytes and
additional BCC.
Byte Length Command
element
00 1 Data
... ... ...
Last 1 BCC
byte
If the data cannot be provided, a negative status message
follows.
Byte Length Command
element
00 1 Status
01 1 Status code
Value range
00 ...FF
hex hex
00 ...FF
hex hex
00 ...FF
hex hex
Value range
<NAK>
See table Status
codes on page
94