FingerVein Online
Installation and Programming Manual
Page
10 of 69
4.2. Routing
FingerVein Online electronics has two jumpers (JMP1 and JMP2) to encode the ID
Application in the KSP protocol.
chapter 6.: “Host communications”
for further details.
4.3. Optical barrier
FingerVein Online electronics allows for an optical barrier to detect the presence of the
finger on the biometric sensor to be controlled. In addition to normal operating
conditions, the optical barrier has two possible error situations:
1.-
Permanent obstruction of the beam.
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, this may be due to a mechanical or electronic fault. Under normal conditions, 2
or 3 consecutive identification attempts can be made without removing your finger
from the biometric sensor before this error is triggered. This parameter can be
configured, as explained in
2.-
Interference by external light sources
. If the FingerVein Online electronic terminal
is exposed to extreme light conditions, this can saturate the receiver element, thus
preventing it from detecting the presence of a finger.
Both permanently blocking the beam and saturating the receiver trigger an error
situation, in the event of which the Host will receive notification (
event, code 0xED ). In this situation, a key must be pressed (e.g. the green “Enter” key)
to start the biometric identification.
It will automatically return to normal when the beam of light is no longer obstructed or
the external interference is removed (
event, code 0x0D).
