•
I/O linking
: The I/O linking evaluation strategy allows you to link the inputs of the
device to its outputs
see "Inputs and outputs", page 42
.
•
Perpendicular distance to the reference line
: The device outputs the perpendicular dis‐
tance to an object located within the evaluation field. The perpendicular distance
d
is output in the
LFEperpdistresult
telegram, see Telegram Listing. The response time,
blanking size, and orientation of the reference line can be configured in SOPAS.
Response time
For the
Pixel analysis
,
Blanking
,
Contour
and
Perpendicular distance to the reference line
eval‐
uation strategies, you define a response time. For the device to detect an object
using the
Pixel analysis
,
Blanking
and
Perpendicular distance to the reference line
evaluation
strategies, the object must be detected at the same location for at least the duration
of the response time. For the
Contour
evaluation strategy, the contour breach must be
detected at the same location for at least the duration of the response time.
Manipulation prevention
When
Pixel analysis
is configured, dazzling can cause the device to stop monitoring a
field. When
Blanking
is configured, small objects in the vicinity of the device can cause
large shadows.
If you use evaluation fields at a distance to the device, the object or the object errone‐
ously measured due to dazzle lies outside the evaluation field and is not detected.
To prevent this, you can configure the
Manipulation protection
option.
Evaluation field at a distance from
the device
S
ha
d
in
g
Object smaller
than blanking
Area hidden
by glare
Light source
2
1
3
4
5
Figure 32: Tamper-proofing against shadowing and dazzle
1
Shadowing
2
Evaluation field with distance to the device
3
Object smaller than blanking
4
Light source
5
Blanked area
The
Manipulation protection
option switches the evaluation field:
PRODUCT DESCRIPTION
3
8013796/1ALS/2021-03 | SICK
O P E R A T I N G I N S T R U C T I O N S | LMS5xx
41
Subject to change without notice
