SICK nanoScan3

Remedial measures:
•
Mount
ing of deflector plates to protect the undetected areas
•
Mounting the safety laser scanner in the machine or vehicle paneling
Near range
In close proximity (50mm-wide area in front of the optics cover), the detection capabil‐
ity of the safety laser scanner may be restricted. If required, this area must be secured
using an undercut or frame, for example.
4.3.3 Reference contour monitoring
Vertical operation
N
ational and international standards require or recommend that a reference contour is
monitored if the angle between access direction and scan plane exceeds 30°. With the
reference contour field, the safety laser scanner monitors the distance to a contour of
the environment (e.g. a wall) in order to detect inadvertent adjustment or manipulation.
Configuring the reference contour field during vertical operation
•
In man
y cases, it makes sense to use the floor and lateral vertical passage
boundaries (e.g. door frames) as a reference contour.
•
The resolution of the reference contour field specifies how large a gap in the
contour or an object in the reference contour field must be for the reference
contour field to detect the gap or object in any case. Smaller gaps or objects can
also trigger detection in some cases.
•
The length of the monitored contour must be greater than the set resolution of the
reference contour field.
•
The reference contour field has an adjustable tolerance band. If the safety laser
scanner does not detect the reference contour within the tolerance band, all
safety outputs switch to the OFF state. In Safety Designer, you can define the
tolerance band around the reference contour in both directions (near and far).
°
For high availability, setting both the positive tolerance band (far) and the
negative tolerance band (near) to the TZ value is recommended. (TZ = toler‐
ance zone of the safety laser scanner, see "Data sheet", page 117.)
°
The tolerance band must not be too wide. The reference contour field must
detect a deviation from the reference contour before access to the hazardous
point occurs next to the protective field. Deviations may occur due to changes
in position or orientation.
°
If the reference contour represents the edge of the protected opening, the
sum of the negative and positive tolerance bands must not be greater than
the resolution of the protective field.
°
If the reference contour does not represent the edge of the protected open‐
ing, the sum of the negative and positive tolerance bands must not be
greater than the projection.
•
You can define a number of contours in the reference contour field and therefore
monitor various areas in the environment.
Protective field and reference contour field for hazardous point protection
T
he protective field must be larger than the protected opening. The required overrun (o)
is calculated using the following formula:
o ≥ (2 × TZ) – d
Where:
•
o = overrun of the protective field over the opening
•
TZ = tolerance zone of the safety laser scanner, see "Data sheet", page 117
•
d = set resolution
4 P
ROJECT PLANNING
22
O P E R A T I N G I N S T R U C T I O N S | nanoScan3 – EtherNet/IP™ 8027909/2023-02-22 | SICK
Subject to change without notice