40
O P E R A T I N G I N S T R U C T I O N S | safeRS3
8027489/2022-03-01 | SICK
Subject to change without notice
5 FUNCTIONING PRINCIPLES
5.2.6
Independent protective fields: a use case
It can be useful to set the protective fields as independent, for example, if there is a
scheduled temporary motion of an object in a protective field. An example can be a
robotic arm moving from right to left within the protective field 1 only during a specific
phase of the operative cycle.
In this case, it is possible to ignore the detection signal in the protective field 1, thus
avoiding unnecessary downtime.
WARNING
Evaluate the safety of the monitored area during risk assessment before deciding to
ignore the detection signal of the protective field 1.
WARNING
The blind area generated by the moving robotic arm can prevent the sensor from
detecting targets in the following other protective fields for an interval of time. This time
must be considered when defining the detection distance for protective field 2.
5.3
Safety working modes and safety functions
5.3.1
Introduction
Each protective 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.
