SICK microScan3 - EFI-pro

•
Mac
hine stopping time (time interval between triggering the sensor function and
the end of the machine’s dangerous state, including signal propagation times in
the network and processing time in the control)
•
Response time of the protective device, see "Response times", page 157
•
Reach or approach speed of the person
•
Resolution (detection capability) of the safety laser scanner
•
Type of approach: parallel
•
Parameters specified based on the application
•
Supplements for general and, possibly, reflection-based measurement errors
•
Supplement to protect against reaching over
•
Height of the scan plane
•
Switching time between monitoring cases
Important information
NOTE
Mor
e information is available in the ISO 13855 standard and in the Guide for Safe
Machinery.
NOTE
SIC
K offers a stopping/run-down time measurement service in many countries.
Calculation example of the minimum distance S according to ISO 13855
T
he example shows the calculation of the minimum distance for parallel approach to
the protective field. Depending on the application and the ambient conditions a differ‐
ent calculation may be required. (e.g., a protective field or at an arbitrary angle to the
direction of approach or an indirect approach)
b
Calculate S using the following formula:
S = 1600 mm/s × T + TZ + Z
R
+ C
where:
°
S = minimum dis
tance in millimeters (mm)
°
T = stopping/run-down time for the entire system in seconds (s)
(Response time of the safety laser scanner + machine’s stopping/run-down
t
ime, incl. response time of the machine’s control system and signal propaga‐
tion time)
°
T
Z = tolerance range of the safety laser scanner, see "Data sheet", page 152
°
Z
R
= supplement for reflection-based measurement errors in millimeters
(mm)
°
C = supplement to protect against reaching over in millimeters (mm)
The reach/approach speed is already included in the formula.
Supplement Z
R
f
or reflection-based measurement errors
All devices: If there is a retroreflector in the vicinity of the protective device (distance of
the retroreflector from protective field ≤ 6 m), you must take the supplement Z
R
=
350 mm into account.
Devices with max. protective field range of 9 m for stationary applications: Strongly
reflective surfaces (e.g. shiny metal, tile) with a distance from the protective field ≤ 6 m
can behave similarly to a retroreflector if the laser beam hits the surface vertically. If
the protective field is larger than 50% of the protective field range in the direction of the
laser beam which is hitting the surface vertically, you must take supplement Z
R
=
4 P
ROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | microScan3 – EFI-pro 8021913/15ZW/2019-11-14 | SICK
Subject to change without notice