WARNING! When the restart prevention function is active the monitored area may be affected by the
position and inclination of the sensors, as well as by their installation height and angular coverage
(see "Sensor position" on page52).
4.6 Safety working mode: Always access detection
4.6.1 Safety function:access detection
This is the only safety function available for the Always access detection. Access detection allows what follows:
When... Then...
no motion is detected in the detection field the safety outputs remain active
motion is detected in the detection field l the access detection function remains active
l the safety outputs are deactivated
l the angular coverage and sensitivity remain as they
were before the motion detection
WARNING! If the Always access detection is selected, additional safety measures must be
introduced to ensure the restart prevention function.
4.6.2 T
OFF
parameter
If the safety working mode is Always access detection, when the system does not detect motion anymore, the
OSSD outputs remain in OFF-state for the time set in the T
OFF
parameter.
The T
OFF
value can be set from 0.1 s to 60 s.
4.7 Safety working mode: Always restart prevention
4.7.1 Safety function:restart prevention
This is the only safety function available for the Always restart prevention.
The restart prevention allows what follows:
When... Then...
no motion is detected in the detection field l the safety outputs remain active
motion is detected in the detection field l the safety outputs are deactivated
l the restart prevention function remains active
l the angular coverage and sensitivity remain as they
were before motion detection
The sensor can detect micro-movements of just a few millimeters, such as breathing movements (with normal
breathing or a short apnea) or the movements necessary for a person to remain in balance in an upright or
squatting position.
The system sensitivity is higher than the sensitivity that characterizes the access detection function. For this
reason, the system reaction to vibrating and moving parts is different.
WARNING! When the restart prevention function is active all the sensors have a 110° angular
coverage.
WARNING! When the restart prevention function is active the monitored area may be affected by the
position and inclination of the sensors, as well as by their installation height and angular coverage
(see "Sensor position" on page52).
4. Functioning principles
LBK System Series| Instruction manual v1.2 SET 2021|SAF-UM-LBKBus-en-v1.2|© 2020-2021 Inxpect SpA
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