OBID
i-scan
®
UHF
Manual
ID ISC.MU02.02
FEIG ELECTRONIC GmbH
Page 13 of 96
H90701-3e-ID-B
protocol block
protocol cycle
t
s
+ t
r
5.3. Scan-Mode
In this operation-mode the Reader autonomously sends out data to the host as soon as a Tran-
sponder is within the detection range and valid data could be read.
In Scan Mode the contents of the message block (UID, data block) can be adapted to each user-
application. Scan mode is available via the RS232 Interface, the USB Interface and the Data-Clock
Interface.
If an USB-Reader is used in scan mode, the reader sends its data automatically over the HID inter-
face of the operating system. In this case, you cannot catch the data with the FEUSB.DLL or any
other libraries. The reader works like a keyboard.
The Reader starts the output of the protocol block as soon as all required data have been read
correctly from the Transponder. If the number of transmitted user data is too large, only the maxi-
mal number of transmitted data will be sent plus the end character.
Scan-Mode via asynchronous interface:
The data will be sent out depending on their configuration according to the following
scheme, the sequence of which cannot be changed. Depending to the configuration and
the number of Transponders in the detection range of the Reader the transmitted proto-
cols have a different format.
Example 1:
One Transponder in detection range and UID and data block should be read:
PR
SC
UID
SC
data
EC
PR
SC
UID
Example 2:
3 Transponders in detection range only UID should be read:
PR
SC
UID1
EC
UID2
EC
UID3
EC
Example 3:
3 Transponders in detection range only data block should be read:
PR
SC
data1
EC
data2
EC
data3
EC
Example 4:
2 Transponders in detection range UID and data block should be read:
PR
SC
UID1
SC
data1
EC
UID2
SC
data2
EC
PR:
Com-Prefix (optional)
ts:
VALID-TIME
UID:
Serial-Number. (fix)
tr:
time to the next new Transponder reading
data:
data blocks (free programmable)
SC
Separation character (optional)
EC
End character (optional)
