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Protocols for the Buffered Read Mode
10.2 Transponder access in Buffered Read Mode
RF290R
98
Configuration Manual, 09/2014, C79000-G8976-C377-01
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
2
3
4
5
6, 7
8, 9
Content
STX
MSB
ALENGTH
LSB
ALENGTH
COM-ADR
[0x22]
DATA-SETS
CRC16
Default
0x02
-
-
-
-
-
-
Table 10- 2
Reader → host
Byte
1
2
3
4
5
6
7
(8)
8, 9 (9,
10)
(10 oder
11 ... n-
2)
n-1, n
Content
STX
MSB
ALENG
TH
LSB
ALENG
TH
COM-
ADR
[0x22] STATU
S
1)
TR-
DATA1
TR-
DATA2
DATA-
SETS
DATA CRC16
Default
0x02
-
-
-
-
-
-
-
-
-
-
1)
You will find further information in the Appendix (Page 103).
Name
Description
DATA-
SETS
Number of data sets transferred from the data buffer. If the data buffer does not contain the specified number of
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-
DATA1
Selection of data types for the read operation
Bit
7
6
5
4
3
2
1
0
Func-
tion
-
-
TIME
ANT
Byte
order
-
DB
IDD
Func-
tion
Description
IDD
Identification data (UID or EPC)
DB
Data block