Filling Tank

Designed and implemented a PLC-controlled tank filling and draining system. When the Start button is pressed, the filling process runs for 5 seconds and then stops automatically. When the Stop button is pressed, the draining process runs for 10 seconds and then stops automatically.

The PLC program uses timer-based sequential logic and command interlocking to ensure that the active operation continues uninterrupted. Pressing Stop during filling does not interrupt the filling cycle, and pressing Start during draining does not interrupt the draining cycle. A new operation can begin only after the current cycle is completed.