Verification and Operation
This section describes verification of the safety function and safe operation of the system.
Commissioning and Revalidation
The safety function must be tested by triggering the safety sensor and verifying that the robot or PLC performs a safe stop.
Revalidation is required after any change that may affect safety, including:
Changes to robot type, payload, or speed
Changes to tool configuration, mounting, or TCP
Modifications to safety wiring or controller configuration
Software or firmware updates
Changes to the application or workpiece
Important
The safety function must be tested to ensure that a safe stop is correctly initiated when triggered.
Validation of Safety Function
The integrator shall verify that the safety function meets applicable safety requirements.
Validation may include:
Verification of correct safety signal transmission (OSSD)
Verification of robot stopping behavior
Measurement of contact forces where applicable
Testing under worst-case operating conditions
Verification of stopping time and distance where applicable
Note
Validation shall consider maximum speed, payload, and reach of the robot.
Important
Compliance cannot be assumed from component specifications alone.
Safe Restart and Fault Recovery
After a safety stop has been triggered:
Identify and remove the cause of the stop
Ensure that no person is within the hazard zone
Reset the robot or PLC safety system
Verify normal operation before resuming production
Warning
Automatic or unexpected restart of the system is NOT permitted.
Restart must always be initiated by a deliberate action from the operator or control system.