OBID i-scan
®
System-Manual
ID ISC.LR200
FEIG ELECTRONIC GmbH
Page 151 of 174
H90692-16e-ID-B.doc
8.3. [0x21] Read Buffer
The command Read Buffer reads a number of data sets from the data buffer.
Host
→
Reader
1
2
3
4
5...6
6
COM-ADR
[0x21]
DATA-SETS
CRC16
Host
←
Reader
1
2
3
4
(5)
(6)
6 / (n)
COM-ADR
[0x21]
STATUS
34
TR-DATA
DATA-SETS
©
(7...n-2)
5...6 / (n-1,n)
ª
DATA
CRC16
DATA-SETS:
Number of data sets to be transferred from the data buffer. If the data buffer does not contain
the requested number of data sets, the Reader responds with all available data sets and an
error will occur. The Reader will reduce the number of data sets if the maximum number of
256 bytes for the answer protocol is reached.
TR-DATA:
Selects the data types for read operation.
Bit:
7
6
5
4
3
2
1
0
Function
-
-
TIMER
ANT
-
-
DB
SNR
SNR
= Serial Number
DB
= data block
ANT
= Antenna number
Antenna
ANT
1
0x01
2
0x02
3
0x04
4
0x08
5
0x10
6
0x20
7
0x40
8
0x80
TIMER
= internal system timer (see chapter
4.6. [0x85] Set System Timer
for details)
34
see ANNEX D: Index of Status Bytes