User's Manual

ACG HF Multi ISO RFID Reader V1.0
ACG Identification Technologies GmbH 66
12.4.3.5.1 Time slotted answer
In party line mode, more than one reader can be used simultaneously. The time
slotted answer allows separating in time the answers from all connected devices. The
station ID is used to determine the correct time slot.
The reader supports up to 254 unique time slots. The following formula calculates the
duration of one time slot (only one baud rate is supported per party line):
6*
10
][
0
Baudrate
sT =
Figure 12-20: Time slot formula
The following figure shows the timing diagram of time slotted answers.
Timeslot 0 1 2 3 4 5 … 252 253 254
T
0
T
1
T
2
T
3
T
4
T
5
T
252
T
253
T
254
HOST
'g' →
Reader (01)
←
01
Reader (03)
←
03
Reader (04)
←
04
Reader (254)
←
254
Figure 12-21: Timing diagram of time slotted answers