Runnable simulator field guide
Safety-mat monitoring scenario: test checklist
Direct answer
The learner can distinguish clear, occupied, faulted and reset states, prevent hazardous command while occupied and test release without automatic restart.
Written for automation learners studying how a pressure-sensitive protective device can be represented in a bounded machine-state model.
Scenario setup
Hazard, detection zone, clear state, occupied state, channel status, monitor fault, machine request, stopping state, reset permission and restart prevention.
I/O and state map
Mat actuation through sensing channels and monitor state into safety request, final elements, modeled stopping response and reset feedback.
Normal run
Clear zone permitting a separate deliberate start, mat actuation removing hazardous request and release alone not restarting motion.
Boundary run
Partial actuation, stuck state, open channel, short condition, reset held, person remains in zone, final-element fault, restart and power return.
Injected fault
A mat, channel, monitor, request, final element, stopping, zone-clear, reset or restart mismatch.
Target check
The real application risk-assessed and validated using device response, stopping time, placement, environment and applicable standards.
What should happen when a safety mat is stepped on?
The protective function should request the defined stop or inhibit hazardous motion; the exact response depends on the risk assessment and validated safety architecture.
Should a machine restart when someone steps off a safety mat?
No automatic restart should result merely from clearing the mat. A separate controlled reset and deliberate start should follow the approved design.