Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung Seite 276

BIS U-6127-081-1_4-06-ST36
Processor unit
8
007 protocol (continued)
Command identifier 'M': Detect data carriers
Detects the data carriers (max. 255) that are located in the
detection range of the specified antenna and returns the
data specified under data type. With the data carrier
selection, either all or only selected data carriers can be
detected (see Command identifier 'z': Select data carrier
(Select) on page 105).
Byte Length Command
element
00 1 Command
identifier (ASCII)
01 1 Antenna number
(ASCII)
02 1 Data type: EPC
or TID (ASCII)
03...05 3 Max. number of
data carriers
(ASCII)
06 1 Data carrier
selection (ASCII)
07 1 BCC
The positive status message contains additional
information and is transmitted as follows.
Byte Length Command
element
00 1 Status
01 1 Antenna number
(ASCII)
02 1 Data type EPC or
TID (ASCII)
03...05 3 Number of data
carriers found
(ASCII)
06...07 2 Number of bytes
for the ID per
data carrier
(ASCII)
08 1 BCC
If the data cannot be provided, a negative status message
follows.
Byte Length Command
element
00 1 Status
01 1 Status code
100 english
If the status message is positive, data is requested with
<STX>.
Byte
00
Value range
This is followed by the requested data, which is divided
into several packets if there is a large amount of data.
Each packet contains the total number of packets and the
'M'
current packet number. Via the control command <STX>,
the packets can be fetched iteratively.
'0': All active
antennas Byte
'1'...'4': Single
antenna
00
'E': EPC
01
'T': TID
"000"..."255"
02...04 3
05...07 3
'0': All
'1': Selected
08...13 6
00 ...FF
hex hex
14
Value range
Last
<ACK>
byte
'1'...'4'
Data block
'E': EPC
The data block consists of one or more frames with a
'T': TID
length of 66 bytes each. Each frame contains the
requested data (EPC or TID) and the antenna number of
"000"..."255"
the antenna that detected the respective data carrier.
Byte
"64"
00
01
02...65
00 ...FF
hex hex
66
Value range
67
68...131 64
<NAK>
See table Status
codes on page
...
94
Length Command
element
1 Control com-
mand
Length Command
element
1 Status
1 Antenna number
(ASCII)
Total number of
packets (ASCII)
Packet number
(ASCII)
Number of bytes
in the data block
(ASCII)
Quan- Data block
tity
1 BCC
Length Command
element
1 Antenna number
1 Reserved
64 EPC/TID
1 Antenna number
1 Reserved
EPC/TID
... ...
Value range
<STX>
Value range
<ACK>
'1'...'4'
"001"..."999"
"000000"...
"999999"
"000000"...
"999999"
See description
Data block on
page 100
00 ...FF
hex hex
Value range
01 ...04
hex hex
00
hex
See description
EPC/TID on
page 101
01 ...04
hex hex
00
hex
See description
EPC/TID on
page 101
...