34
SBV System Series | Instruction manual v1.2 DEC 2021 | SAF-UM-SBVBus-en-v1.2 | © 2021 Inxpect SpA
4. Functioning principles
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 page 42).
4.6.2 Restart timeout parameter
When the system does not detect motion anymore or, with static object detection option enabled, no static object
is detected, the OSSD outputs remain in OFF-state for the time set in the
Restart timeout
parameter.
The default value is 4 s, the maximum is 60 s and the minimum is the CRT (Certified Restart timeout).
WARNING! The static object detection option affects the value range of the Restart timeout
parameter and therefore the operation of the restart prevention function. For more information, see
"Restart timeout parameter" below
4.7 Restart prevention function: static object detection option
4.7.1 Introduction
The static object detection option allows the restart prevention function to detect also static objects in the
dangerous area.
NOTICE
: the ability to detect an object depends on the RCS of the object. The static object detection option does
not guarantee 100% detection of a static object.
4.7.2 Availability
The static object detection option is available for:
l
control unit firmware version 1.5.0 or later, and
l
sensor firmware version 3.0 or later.
4.7.3 Possible applications
This option can be useful if the sensor is installed on moving elements (see "Installations on moving elements"
on page 48) or to prevent the restart of a robot that could bump into a static object temporarily in the area.
4.7.4 Operation
The option can be enabled for each detection field of each sensor with safety working mode set to
Both (default)
or
Always restart prevention
. Enable the option only if the detection field is free of static objects, otherwise the
system would never reactivate the detection signals after that a motion is detected in the area.
The option is active in the detection field area, defined by the angular coverage and detection distance set.
4.7.5 Restart timeout parameter
With the static object detection option enabled, the
Restart timeout
parameter minimum value is 0.1 s.
WARNING! If the Restart timeout is set with a value lower than 4 s, the sensor is no longer able to
detect the breathing movements or the movements necessary for a person to remain in balance in an
upright or squatting position. Set a value lower than 4 s only for areas where people have no access.
4.8 Features of the restart prevention function
4.8.1 Cases of non-guaranteed function
The function is not guaranteed in the following cases:
l
there are objects that limit or prevent the sensor from detecting motion.
l
the person is lying on the floor and the sensor is installed at a height below 2.5 m (8.2 ft) or with an
inclination lower than 60° downward.
l
the sensor does not detect a sufficient portion of the body, for example if it detects the limbs but not the
torso of a person sitting
[A]
, lying down
[B]
or leaning
[C]
.
WARNING! The position of the person is determined by the position of his or her center of
gravity. This function is not guaranteed if a person has body parts within the sensor field of
view but the axis of the person’s center of gravity is outside that field.
Summary of Contents for SBV System Series
Page 101: ......
