Multiple sampling
Mult
iple sampling specifies how often an object has to be detected before the safety
camera sensor responds. A higher multiple sampling reduces the possibility that
insects, weld sparks or other particles cause the machine to be shut down. You will
increase the machine’s availability.
A higher multiple sampling setting increases the response time and affects the mini‐
mum distance, see "Response time", page 93.
Table 26: Recommended multiple sampling
Application Recommended multiple
s
ampling
Stationary application:such as horizontal hazardous area protec‐
t
ion or vertical hazardous point protection under clean ambient
conditions
2-fold
Stationary application:such as vertical access protection
For vertical access protection with a narrow protective field in the
direction of passage, only 1-fold, 2-fold or 3-fold multiple sampling
must be used.
2-fold
Mobile application 4-fold
Stationary application:such as horizontal hazardous area protec‐
t
ion under dusty ambient conditions
8-fold
NOTICE
In t
he case of 1-fold sampling, dust and other disturbances can lead to false shut‐
downs.
Measures to increase availability:
b
Align the device towards a fixed background.
b
Select a protective field that is only as large as necessary.
b
Select the highest possible object resolution.
b
Avoid retroreflectors in the field of view.
b
Avoid laser sources (e.g., laser scanners) and other strong light sources in the
detection zone.
Multiple sampling after switching between monitoring cases
W
hen switching between monitoring cases, it is possible that a person may already be
in the newly activated protective field when switching takes place. To ensure that the
person is detected quickly and the dangerous state is brought to an end swiftly, you can
adjust the multiple sampling (n) setting immediately after switching between monitoring
cases – regardless of any other multiple sampling in place.
For persons and body parts to be reliably detected, each monitoring case must be
active for at least as long as the device requires for detection.
•
Fast (default)
Multiple sampling after switching between monitoring cases n
C
S
= 1. An object
must be detected once, then the safety camera sensor responds. Fastest
response of the safety camera sensor. False shutdowns can occur in the event
of interference at the time of monitoring case switching.
•
R
eliable
Multiple sampling after monitoring case switching n
C
S
= n – 1, min. 1. Multiple
sampling after switching between monitoring cases is one detection fewer than
any other multiple sampling in place. This reduces the possibility that insects, weld
sparks, or other particles cause the machine to be switched off. This increases
machine availability. The standard response time applies from the outset in the
new field.
7 C
ONFIGURATION
62
O P E R A T I N G I N S T R U C T I O N S | safeVisionary2 8025919/1I9E/2023-01-09 | SICK
Subject to change without notice
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