4.3.4.1
Protective field size
Overview
The protective field must be configured in such a way that a minimum distance (S) to
the hazardous area is maintained. This minimum distance ensures that the hazardous
point can only be reached if the dangerous state of the machine has been stopped
completely.
You can operate the device in stationary horizontal operation using a 50 mm or 70 mm
resolution. For each resolution, you can select between a 60 ms and 120 ms response
time. The resolution and response time determine the maximum protective field range
1)
of the device.
•
If the 50 mm resolution is selected, the maximum protective field range is less
than for the 70 mm resolution, however you can mount the device as low as you
wish.
•
If the 70 mm resolution is selected, you can configure the largest protective field
range but need to position the scan plane of the device at 300 mm.
Important information
WARNING
Persons or parts of the body to be protected may not be recognized or not recognized in
time in case of non-observance.
With a 70 mm resolution and low mounting height, it may not be possible to detect a
human leg.
b
For horizontal stationary applications with a 70 mm resolution, mount the scan
plane at a height of at least 300 mm above the floor in accordance with
ISO 13855 (
see "Height of the scan plane at 70 mm resolution", page 40
).
NOTE
If you define several monitoring cases with different protective fields, you must calcu‐
late the protective field sizes for all protective fields used.
NOTE
As you can select from two different resolutions and two different response times, it
may be necessary to calculate the protective field size several times (iterative calcula‐
tion).
•
First calculate the protective field based on a resolution of 50 mm and a basic
response time of 60 ms.
•
If the calculated protective field is larger than the maximum protective field range
at 50 mm resolution, recalculate the protective field using the same resolution
and the faster response time.
•
If the calculated protective field is larger than the maximum achievable protective
field range, recalculate the protective field using the lower resolution.
Minimum distance S
The minimum distance S depends on the:
•
Approach speed of the body or parts of the body
•
Stopping time of the machine or system
The machine stopping/run-down time can be obtained from the machine docu‐
mentation or must be determined by measurement.
•
Response time of the safety laser scanner
•
Supplements for general and, possibly, reflection-related measurement errors
1)
Radial distance to the safety laser scanner.
PROJECT PLANNING
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8013291/ZA19/2019-11-14 | SICK
O P E R A T I N G I N S T R U C T I O N S | S3000 PROFINET IO, S3000 PROFINET IO-OF
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Subject to change without notice
