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OBID
i-scan
®
HF System-Manual
ID
ISC.LR1002
FEIG ELECTRONIC GmbH
Page 153 of 173
H20411-0e-ID-B.docx
10.4. [0x22] Read Buffer
The command Read Buffer reads a number of data sets from the data buffer.
Host
→
Reader
1
2
3
4
5
6 .. 7
8...9
STX
(0x02)
MSB
ALENGTH
LSB
ALENGTH
COM-ADR [0x22] DATA-SETS
CRC16
Host
←
Reader
1
2
3
4
5
6
7
STX
(0x02)
MSB
ALENGTH
LSB
ALENGTH
COM-ADR [0x22] STATUS
TR-DATA1
©
(8)
8, 9 (9, 10)
(10 or 11 ... n-2)
n-1, n
ª
TR-DATA2 DATA-SETS
DATA
CRC16
DATA-SETS:
Number of data sets to be transferred from the data buffer. If the data buffer does not con-
tain the requested number of data sets, the Reader responds with all available data sets.
TR-DATA1:
Selects the data types for read operation.
Bit:
7
6
5
4
3
2
1
0
Function
-
-
TIME
ANT
Byte
Order
- DB
IDD
IDD
= Identifier Data (UID or EPC)
DB
= data block
Byte Order
= b0:MSB first, b1:LSB first
ANT
= Antenna number
TIME
= internal system time
Notes:
•
If the ANT bit in TR_DATA (CFG11) is set in Buffer-Info-Mode:
When a Transponder is detected by multiple antennas, only one data set is stored. The Valid-
Time is only set at the first detection. If a data set is transferred to the host and the same Trans-
ponder is detected in another antenna but the Valid-Time has not yet elapsed, no other data set
is stored.
•
If the ANT bit in TR_DATA (CFG11) is not set in Buffer-Info-Mode and a Transponder is
detected by multiple antennas, the data set for each antenna is stored.
22
see ANNEX D: Index of Status Bytes