Safety — Functional Safety
Functional Safety — safety-rated controllers, light curtains, e-stops. Two enums (safety state, fault category), three structured types for safety-relevant records.
OPC UA companion specification for safety-rated industrial equipment — safety controllers, light curtains, emergency stops, two-hand controls. Distinct from general device monitoring; safety data has strict reporting requirements per IEC 61508 / 62061.
What's in the package
| Artefact | Count |
|---|---|
| Enums | 2 |
| DTOs | 3 |
| Codecs | 3 |
| Registrars | 1 (SafetyRegistrar) |
Loading
use PhpOpcua\Client\ClientBuilder;
use PhpOpcua\Nodeset\Safety\SafetyRegistrar;
$client = ClientBuilder::create()
->loadGeneratedTypes(new SafetyRegistrar())
->connect('opc.tcp://safety-plc.local:4840');Direct dependencies
None — Safety is a root spec.
Notable types
The three DTOs cover the safety-event reporting shape — safety function state, fault classification, and acknowledgement records.
Notable enums
SafetyStateEnum— safe / unsafe / unknownSafetyFaultCategoryEnum— fault-category classification
Warning
The OPC UA channel is not a safety-rated communication path. Safety data exposed over OPC UA is for monitoring and visibility — not for safety-function execution. Real safety logic runs on the safety-rated controller; OPC UA reports its outcome.