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Protocols for the Buffered Read Mode
10.2 Transponder access in Buffered Read Mode
10.2
Transponder access in Buffered Read Mode
The Buffered Read Mode only reads data blocks from the transponders in the antenna field.
The anticollision process can be set up in the configuration block "CFG5: Anticollision
(Page 30)".
After turning on or the "[0x64] System Reset (Page 48)" command, the buffered read mode
starts reading the transponders.
10.3
[0x22] Read Buffer
The "Read Buffer" command reads a number of data sets from the data buffer.
Table 10- 1
Host → reader
Byte
1
Content
STX
Default
0x02
Table 10- 2
Reader → host
Byte
1
Content
STX
MSB
ALENG
Default
0x02
You will find further information in the Appendix (Page 103).
1)
Name
Description
DATA-
Number of data sets transferred from the data buffer. If the data buffer does not contain the specified number of
SETS
data sets, all existing data sets are transferred and an error is generated. If the response protocol reaches the
maximum length of 256 bytes, the reader reduces the number of data sets.
TR-
Selection of data types for the read operation
DATA1
Bit
7
Func-
-
tion
Func-
Description
tion
IDD
Identification data (UID or EPC)
DB
Data block
98
2
MSB
LSB
ALENGTH
ALENGTH
-
2
3
4
LSB
COM-
ALENG
ADR
TH
TH
-
-
-
6
5
-
TIME
3
4
COM-ADR
-
-
5
6
[0x22]
STATU
TR-
S
DATA1
1)
-
-
4
3
2
ANT
Byte
-
order
Configuration Manual, 09/2014, C79000-G8976-C377-01
5
6, 7
[0x22]
DATA-SETS
-
-
7
(8)
8, 9 (9,
10)
TR-
DATA-
DATA2
SETS
-
-
-
1
0
DB
IDD
8, 9
CRC16
-
(10 oder
n-1, n
11 ... n-
2)
DATA
CRC16
-
-
RF290R
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