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The tolerance is allowed to be exceeded for a certain period of time. After that the sys‐
tem switches to a safe state (lock-out). The period of time depends on the vehicle
speed,
.
Figure 70: Tolerances allowed on the dynamic inputs
Speed on input C
Speed on input D
•
If the vehicle speed is in the range between –10 cm/s and +10 cm/s, then no
shut down occurs, irrespective of how long the deviation between the incremental
encoders is present.
•
If the vehicle speed is between –30 and –10 cm/s or +10 and +30 cm/s, then
the maximum period of time for which a deviation is tolerated is 60 s.
•
If the vehicle speed is in the range ≤–30 cm/s or ≥+30 cm/s, then the maximum
period of time for which a deviation is tolerated is 20 s.
•
If the vehicle speed is in the range ≤–10 cm/s or ≥+10 cm/s, then different direc‐
tions of rotation on the incremental encoders are only tolerated for 0.4 s.
•
You can disable the tolerance ranges by switching to a monitoring case in which a
speed threshold is monitored.
Further topics
•
"Monitoring case switching via speed information", page 108
7.8
Inputs
Overview
It is possible to switch between the monitoring cases of the safety laser scanner during
operation. The following options are available for doing this:
7
CONFIGURATION
92
O P E R A T I N G I N S T R U C T I O N S | S3000
8009942/ZA18/2019-11-14 | SICK
Subject to change without notice