Safety / Interlocks / Trips¶
Purpose¶
Safety / Interlocks / Trips provides permissives and trip conditions that protect equipment and people.
Responsibilities¶
- Evaluate safety permissives.
- Detect trip conditions.
- Block or stop propulsion when required.
- Provide clear trip causes to the state machine and HMI.
Key Interfaces¶
| Interface | Direction | Description |
|---|---|---|
| Safety inputs | Input | Hardwired and networked safety conditions |
| Interlock status | Output | Permissives and blocking conditions |
| Trip status | Output | Active trip causes |
Notes¶
Safety-related PLC logic must be clearly separated from non-safety convenience logic.