Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung Seite 283

BIS U-6127-081-1_4-06-ST36
Processor unit
8
007 protocol (continued)
Command identifier 'H': Read data carrier, extended
(>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
amount of data, the data is transmitted in fragmented form
in one or more packets, which can be requested one after
the other by the processor unit.
If there are several data carriers in the detection range of
the specified antennas, the desired data carrier must be
selected before reading (see Command identifier 'z': Select
data carrier (Select) on page 105).
For the EPC and TID memory areas there are
simplified commands which return EPC and TID
as filtered information (see Command identifier
'O': Read data carrier, EPC on page 108 and
Command identifier 'y': Read data carrier, TID
on page 109).
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
If the data cannot be provided, a negative status message
follows.
Byte Length Command
element
00 1 Status
01 1 Status code
www.balluff.com
,
StaRt addReSS
. Depending on the
Radio-Frequency
TM
Value range
'H'
"000000"...
"999999"
"000000"...
"999999"
'0': All active
antennas
'1'...'4': Single
antenna
'R': Reserved
'E': EPC
'T': TID
'U': USER
...FF
00
hex hex
Value range
<NAK>
See table Status
codes on page
94
If the command is executed successfully, a positive status
message follows. This contains the first data packet and is
transmitted in the following format:
Byte Length Command
element
00 1 Status
01...03 3 Number of
packets (ASCII)
04...06 3 Packet number
(ASCII)
07...12 6 Number of bytes
(ASCII)
13... No. of Data
bytes
Last 1 BCC
byte
If further packets are available, then they can be requested
via <STX>, the last transmitted data packet contains the
status <EOT>.
Byte Length Command
element
00 1 Control com-
mand
If one of the packets cannot be transferred properly, a
negative status message follows.
Byte Length Command
element
00 1 Status
01 1 Status code
Value range
<ACK> or
<EOT>
"000"..."999"
"000"..."999"
"000000"...
"999999"
Byte:
00 ...FF
hex hex
00 ...FF
hex hex
Value range
<STX>
Value range
<NAK>
See table Status
codes on page
94
english 107