Hypothetical design case
A person approaches a scanner-protected robot
Trace detection to stopped motion, then assess the available distance.
Reviewed 2026-11-04 · Engineering interpretation · authoring reviewed
Scenario and control chain
Hypothetical stationary robot with a safety scanner covering one entrance. Entry into its protective field triggers safety outputs → safety controller → supported robot stop interface. Account for ways around the field and tools or loads that can still cause injury.
Response and distance
Build a proposed timing budget from configured detection, communication or input processing, safety logic, output response and mechanical stopping. Verify each time boundary to avoid gaps or double counting. The SICK reference identifies approach speed, scanner response and machine stopping time as distance inputs. Use the placement method and allowances applicable to the selected product and standard edition.
Safe state and restart
Specify cessation of hazardous motion and control of tool and load hazards. In this example, a cleared field still requires vacancy confirmation, reset and a separate start. Check blind spots and whether a person can remain inside after crossing the field.
Evidence and proposed tests
Record scanner model, field checksum, resolution, mounting and approach paths. Measure robot stopping over credible poses, loads and speeds. Test boundaries, occlusion, communication loss, device faults and power return. PLr, achieved PL, stop time and protective distance remain open.
Sources & editions
SICK S3000 operating instructions ↗
8009942/ZE09, 2026-09-09
4.3.5.1 p.46 and 12.3 p.152. Product-specific reference, no universal distance claimed.
Robot Safety Forum original engineering notes
Initial publication edition 2026-11-04
Proposed stationary-cell timing budget, restart assumptions and tests