BIS V-6108 PROFINET
Processor Unit
54
english
Command Identifier 47
hex
: Read from Multiple Data Carriers
The
Read from Multiple Data Carriers
reads, depending on the configured type, the EPC or the
TID of all data carriers that are located in the active read/write area of the antenna.
Note
The length of the TID or EPC field parameters are configured on the BIS VU read/write
head.
Subaddress
Meaning
Description of Function
00
hex
1st Bit Header
01
hex
Command Identifier 47
hex
: Read from multiple data carriers.
02
hex
Type
EPC (0) or TID (1)
03
hex
Max. number of
data carriers
Maximum number of data carriers to be output 1…255,
(0 = no limit).
If the specification is greater than the maximum
specification of the connected heads, the lower value
applies.
04
hex
Data carrier
selection
All = 0 / Selected = 1
…
None
No meaning
Last byte
2nd Bit Header
If the 1st and 2nd bit headers match, the data is valid.
If the EPCs transfer with the length of 12 bytes, the response in the input buffer is as follows:
Subaddress
Meaning
Description of Function
00
hex
1st Bit Header
01
hex
No. of tags
02
hex
Number of bytes
per EPC
12
This corresponds to the length of the longest transmitted
EPC configured in the device. EPCs shorter than this
length are output right-justified and filled with zeros on
the left.
In the following, the (number of data carriers read) ×
(number of bytes per EPC) are transmitted.
For 64 bytes per EPC, the actual EPC length in ASCII is
specified in the 1st and 2nd byte of the EPC.
03
hex
EPC 1
EPC data uppermost address
…
…
…
…
EPC 1
EPC data lowermost address
…
EPC 2
EPC data uppermost address
…
…
…
EPC 2
EPC data lowermost address
…
…
…
…
EPC n
EPC data uppermost address
…
…
…
EPC n
EPC data lowermost address
Last byte
2nd Bit Header
If the 1st and 2nd bit headers match, the data is valid.
Specific
commands for
BIS VU read/write
heads
7
Device Functions