Industrial automation / PLC · 2025
Automated elevator control
Three-floor elevator sequencing, floor requests, door logic, and interlocks in an industrial automation project.
01 / CONTEXT
The challenge.
A three-floor elevator needs to remember passenger requests, determine its floor, coordinate travel and door movement, and handle obstruction, weight, and emergency inputs. The project translates those requirements into ladder logic and a simulated operator panel.
02 / PROCESS
The approach.
- Define 17 inputs for internal destinations, external calls, floor switches, door states, weight and obstruction signals, door buttons, and an emergency input.
- Map four output commands to upward travel, downward travel, door opening, and door closing.
- Organize floor state and queued destinations with memory bits and latching relays, then coordinate movement using timers.
- Document the I/O map and function tables alongside two CADe_SIMU circuit versions and a LOGO! ladder project.
03 / REFLECTION
The outcome.
Developed a three-floor elevator control design with an operator panel, floor indication, request handling, and door sequencing. The project includes two CADe_SIMU circuits, a LOGO! ladder file, and an I/O and logic reference.
Project scope
Academic simulation project. Team: Alazar Wake, Hadi Saif Ali, Hundaol Benti, and Nahom Yohannes.
04 / RESOURCES