Motion and state
Its opening state provides visible access and interlock feedback.
PLC control pattern
Commission it by proving closed limit, open limit before accepting open command, close command.
Fault practice
Inject jammed, slow states and require the PLC sequence to detect, stop and recover deliberately.
Signal map
I/O you can reason about
PLC output Open command; PLC output Close command; PLC input Closed limit; PLC input Open limit
| Signal | PLC direction | Type / range |
|---|---|---|
| Open command open | output | bool |
| Close command close | output | bool |
| Closed limit closed_limit | input | bool |
| Open limit open_limit | input | bool |
Fault and recovery exercise
Make abnormal states part of the sequence
Inject jammed, slow states and require the PLC sequence to detect, stop and recover deliberately.
jammedslow
Engineering boundary
The model teaches PLC sequence behaviour and diagnosis. Confirm ratings, wiring, guarding, process calculations and commissioning limits against the real manufacturer documentation and site design.