Z
Supplements
S
L
Protective field length for the relevant range of speeds
S
A
= S
Br
+ S
AnF
+ S
AnS
where:
•
S
A
= stopping distance in millimeters (mm)
•
S
Br
= braking distance, from the vehicle documentation, in millimeters (mm)
•
S
AnF
= distance covered during the vehicle control’s response time (including
signal propagation time), from the vehicle documentation, in millimeters (mm)
•
S
AnS
= distance covered during the response time of the safe multibeam scanner
in millimeters (mm)
The distance S
AnS
depends on the response time of the safe multibeam scanner
and the vehicle’s speed. The distance S
AnS
is calculated using the following for‐
mula:
S
AnS
= t
R
× V
max
where:
°
t
R
= response time of the safe multibeam scanner in seconds (s)
°
V
max
= maximum speed of the vehicle, from the vehicle documentation, in
millimeters per second (mm/s) (If you define a number of monitoring cases
with different protective fields: V
max
= maximum speed of the vehicle in the
current monitoring case)
Further topics
•
4.3.6.4
Calculation example for the protective field length
Calculation example for the protective field length S
L
S
L
= S
A
+ TZ + Z
F
+ Z
B
where:
•
S
L
= protective field length in millimeters (mm)
•
S
A
= stopping distance in millimeters (mm)
•
TZ = Tolerance zone of the safe multibeam scanner in millimeters (mm),
•
Z
F
= supplement for lack of ground clearance of the vehicle in millimeters (mm)
•
Z
B
= supplement for the decreasing braking force of the vehicle, from the vehicle
documentation, in millimeters (mm)
4.3.6.5
Calculation example for the protective field width
Calculation example for the protective field width S
B
S
B
= F
B
+ 2 × (TZ + Z
F
)
where:
•
S
B
= protective field width in millimeters (mm)
•
F
B
= vehicle width in millimeters (mm)
•
TZ = Tolerance zone of the safe multibeam scanner in millimeters (mm),
•
Z
F
= supplement for lack of ground clearance of the vehicle in millimeters (mm)
PROJECT PLANNING
4
8025936/2021-01-08 | SICK
O P E R A T I N G I N S T R U C T I O N S | scanGrid2 I/O
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Subject to change without notice
