BioMax2 / KBio2-Online
Installation and Programming Manual
Page
36 of 91
8.1.3. Optical barrier configuration
Optical Guard Time
. This configures the optical barrier guard time:
when the optical barrier has detected the presence of the finger, it is disabled for a
few seconds. This allows for biometric identification, with no new finger detection
events occurring. If the guard time runs out and the finger is still blocking the optical
barrier, a new event will be generated.
Permitted values:
- 0x00 .. 0xFE: Guard time value in tenths of a second.
Default value:
- 0x14: Guard time of 2 seconds.
Optical Watchdog Timer
. In its standby state, the optical barrier
detects the beam of light from the LED transmitter. If it does not detect the beam for
some time, it may be due to a mechanical or electronic fault. In this situation, you
must press the green key (“Enter”) to initiate biometric identification. When the
Watchdog Timer of the optical barrier is triggered, the Host receives a notification
(
event, code 0xED ). It will automatically return to normal
when the beam of light is no longer obstructed (
event, code
0x0D ). The default value of the Watchdog Timer allows for 2 or 3 consecutive
identification attempts to be made without removing your finger from the biometric
sensor.
This parameter is also used to enable Auto-On detection, or to disable finger detection
altogether.
Table 6: Optical barrier configuration
Num
Description
Def.
$02
CFG_OPT_T_
GUARD
Time-out between finger detection events
$14
$03
CFG_OPT_T_
WATCHDOG
Watchdog for permanent blockage detection
$00
$FF
$05
CFG_OPT_
KeyCode
The optical barrier will generate a
event corresponding to a configurable key value
$41
$1D
CFG_Main_
Reader
Auto-On Finger Detection is enabled for the Main
FIM (UART1)
$FF
$05
$1E
CFG_Aux_
Reader
Auto-On Finger Detection is enabled if an auxiliary
FIM (UART0) is connected
$FF
