Instruction Manual

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SBV System Series| Instruction manual v1.2 DEC 2021 |SAF-UM-SBVBus-en-v1.2|© 2021 Inxpect SpA
4. Functioning principles
4.3 Safety working modes and safety functions
4.3.1 Introduction
Each detection field of each sensor can perform the following safety working modes:
l Both (default)
l Always access detection
l Always restart prevention
Each safety working mode is composed of one or both of the following safety functions:
Function Description
Access detection The machinery is reverted into a safe status when a person enters the dangerous area.
Restart prevention The machinery is prevented from restarting if people are in the dangerous area.
4.3.2 Safety working modes
Via the Inxpect Safety application, you can select which safety working mode each sensor will employ for each of
its detection fields:
l Both (default):
o
the sensor performs the access detection function when it is in normal operation (No alarm status)
o
the sensor performs the restart prevention function when it is in alarm status (Alarm status)
l Always access detection:
o
the sensor always performs the access detection function (No alarm status + Alarm status)
l Always restart prevention:
o
the sensor always performs the restart prevention function (No alarm status + Alarm status)
4.4 Safety working mode: Both (default)
4.4.1 Introduction
This safety working mode is composed of the following safety functions:
l access detection
l restart prevention
4.4.2 Safety function: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 safety outputs are deactivated
l the restart prevention function is activated
4.4.3 Safety function:restart prevention
The restart prevention function remains active and the safety outputs deactivated as long as motion is detected
in the detection field or, with the static object detection option enabled (see "Restart prevention function: static
object detection option" on page34), as long as a static object is detected in the detection field.
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 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).