7.13.4 Multiple sampling
If multiple sampling is set, an object must be scanned several times before the safety
la
ser scanner switches its OSSDs to the OFF state. In this way you can reduce the prob‐
ability that insects, welding sparks or other particles result in the shutdown of the sys‐
tem.
If a multiple sampling of 3 is configured, for example, an object must be detected in the
protective field three times in succession before the safety laser scanner switches the
OSSDs to the OFF state.
DANGER
In t
he case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
The total response time is increased by the multiple sampling.
b
With a multiple sampling greater than 2, note that a supplement must be added to
the basic response time.
A multiple sampling of 2 is the minimum setting. The multiple sampling can be set to a
v
alue up to 16 using the CDS. The supplement to the basic response time resulting
from this setting is displayed in the CDS.
Table 26: Recommended multiple sampling
Application Recommended multiple sampling
Stationary under clean ambient conditions 2 times
Vertical applications 2 times
Mobile 4 times
Stationary under dusty ambient conditions 8 times
NOTE
•
Usin
g multiple sampling you can increase the availability of a system.
•
The multiple sampling can be configured in the CDS. A specific multiple sampling
value can be set for each monitoring case.
Further topics
•
"R
esponse times", page 129
7.13.5 Checking the monitoring case switching
To check the switching between monitoring cases, configure a series of monitoring
c
ases. Either an arbitrary sequence, a unique sequence, or two alternative sequences
can be defined.
•
Arbitrary sequence: It is allowed to switch from one monitoring case to any other
defined monitoring case.
•
Unique sequence: It is only allowed to switch from a monitoring case to another
specifically defined monitoring case.
•
Alternative sequence: It is allowed to switch from a monitoring case to one of two
specifically defined monitoring cases.
NOTE
Use t
he monitoring case switching check as an additional check on the control. For
example, to detect deviations of a vehicle from a corridor, or deviations of a system
from the prescribed production process.
7 CONFIGURATION
100
O P E R A T I N G I N S T R U C T I O N S | S300 8010948/ZA21/2020-06-18 | SICK
Subject to change without notice
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