OBID i-scan
®
System-Manual
ID ISC.MR200
FEIG ELECTRONIC GmbH
Page 16 of 144
H40801-5e-ID-B.doc
protocol block
protocol cycle
t
s
+ t
r
1.5. Scan Mode
In this operation mode the Reader autonomously sends out data to the Host as soon as a Trans-
ponder 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 asynchronous Interface.
The Reader starts the output of the protocol block as soon as all required data have been read cor-
rectly from the Transponder. If the Reader is not able to read all data of a protocol block completely
and without error, it does not send data. For example, if the address of the data block is invalid, the
UID of the Transponder will not send out.
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 protocols have a different format.
Example 1:
One Transponder in detection range and UID and data block should be read:
PR
UID
SC
data
EC
PR
UID
Example 2:
3 Transponder in detection range only UID should be read:
PR
UID1
EC
UID2
EC
UID3
EC
Example 3:
3 Transponder in detection range only data block should be read:
PR
data1
EC
data2
EC
data3
EC
Example 4:
2 Transponder in detection range UID and data block should be read:
PR
UID1
SC
data1
EC
UID2
SC
data2
EC
PR:
Com-Prefix (optional)
ts:
SCAN-LOCK-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)