Requirements
Safe state, initiating condition, zone, modes, response, reset, restart and fault behaviour.
Project evidence
Safety Validation & Documentation
Validation provides evidence that the implemented guarding and safety functions meet defined requirements. Documentation makes that evidence usable after installation.
Evidence chainRequirement → design → test → record
- Inputs
- Requirements and drawings
- Tests
- Function, mode and fault
- Output
- Recorded result
Direct answer
What should validation demonstrate?
That the physical guards, protective devices, safety logic and final machine outputs perform the defined safety functions under relevant operating, demand and fault conditions.
Validation should be planned from written requirements, not improvised after the installation is complete.
Design evidence
Layouts, circuits, components, calculations, logic descriptions and configuration records.
Test evidence
Functional demand, timing, sequence, fault insertion, result, issue and corrective action.
Handover
As-built information, final status, maintenance points and future change-control basis.
Typical test questions
Does the system behave correctly when demanded—and when something fails?
- Does each guard or protective device affect the correct hazard and zone?
- Is the safe condition reached and maintained for the required duration?
- Can the machine restart unexpectedly after closing, reset or power restoration?
- Are relevant wiring, device and final-element faults detected?
- Do manual, teach, automatic and recovery modes behave as specified?
- Are stopping-time assumptions and protective-device positions supported?
Handover pack
Documentation should match the agreed project scope.
Requirements
Safety-function and project requirements.
Drawings
Guard layouts and relevant electrical information.
Configuration
Device and software backups where agreed.
Test records
Functional results, issues and final status.
Information for use
Operation, inspection and maintenance information.
