|
General device characteristics
The bibi-COM reader is destined
for readout of Unique type transponders (proximity
identifiers). Transponders can be realized as plastic cards,
key-rings, ampoules etc. Each transponder sends a
non-repeatable 64-bit code in a 125 kHz field. Transponders
use amplitude modulation with Manchester coding.
A transponder, when placed in
the reader's field, repeatedly sends its code. The reader,
however, sends the code to the computer only once.
Transmission is realized through a serial port (RS232). The
code is transmitted as ASCII codes.
Identifiers
The bibi system uses Unique
type transponders. Each transponder of this type has its own
64-bit code, which is sent when the transponder is placed in
the field of the reader's antenna.
Transponders can have different
shapes and sizes. The size of a transponder depends on the
size of the antenna used in it. Different sizes of antennas
mean different readout ranges. The most popular are plastic
cards and key-ring shaped transponders.
Configuring the reader
The bibi-R32 reader can be
configured to best match the user's demands. Configuration
includes work mode and transmission format. The proper
reader configuration can be specified while ordering, or set
up by the user using the bibiCom programme (Windows
98,2000,XP).
Reader's work mode
Online
In the Online mode each time a card is placed in the
reader's field the green LED diode and buzzer signal that
event. Also the card's code is sent once do the computer.
If the 'Signal when card
removed from field' option is selected in the configuration
program, the reader will send a fixed code when the card is
no longer in its field. This is not signaled (LED, buzzer).
Offline
In the Offline mode the red diode does not blink - the
reader does not react if a card is placed in its field. Only
a command sent from the computer will activate the reader.
Then, if there is a card in the
field and its code has not been sent yet, code transmission
will follow. In the other case the red diode will blink and
the reader will wait for a card. A card then placed in the
field will make the reader react as if it was in the Online
mode.
After sending the card's code
the reader will remain inactive. Another card can be read
only if the reader receives a command from the computer.
|
