PENGEMBANGAN MEDIA PEMBELAJARAN PROTOTYPE LIFT BERBASIS PLC PADA MATA PELAJARAN INSTALASI MOTOR LISTRIK KELAS XII TITL DI SMK NEGERI 14 MEDAN

The project builds a three‑floor elevator prototype that is run by a Programmable Logic Controller (PLC). It is meant to be a hands‑on training kit for courses on electrical motor installation. The controller used is an Omron CPM1A PLC, and the system shows how to control a motor in forward and reverse, a key idea in industrial automation. The design follows a clear engineering process. First, the mechanical parts are fabricated. Next, the electrical wiring is installed. Finally, the ladder‑logic program is written for the PLC. The hardware includes: – Limit switches that tell the system which floor the elevator is at. – Push buttons that let a user call

the elevator. – Relay‑driven circuits that control the motor, mimicking a real elevator’s operation. By turning theory into a physical device, the prototype lets students explore PLC input/output setups, interlocking safety features, and step‑by‑step control logic. Tests show that the ladder program reliably moves the elevator to the correct floor, handles safety interrupts, and switches the motor direction as needed. Overall, the elevator kit gives electrical‑engineering students practical experience with wiring, troubleshooting, and industrial programming.

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