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The proximity sensor acts as the water-level detection device in the Automatic Water Filling System . Its exact role is to detect when the water reaches a predetermined level and send a control signal to the relay circuit.   How the sensor works * Water level detection: The sensor detects the presence of water at its installed sensing point. The detection method depends on the sensor type. * Signal transmission: When water reaches the sensing point, the sensor changes its output state (ON/OFF). * Relay control: This output signal controls the intermediate relay, directly or through the timer relay, depending on the circuit wiring. * Valve operation: The relay circuit energizes or de-energizes the solenoid valve to stop or allow water flow. ### Example of operation * Tank level is low: The control circuit opens the solenoid valve to allow water into the tank. * Water reaches the target level: The sensor changes its output, triggering the control circuit to close the sole...

  PLC Programming Series  ⚡ Your First Practical PLC Program: Start / Stop Motor Control In this lesson, we’ll build our first practical PLC program and learn how to control a motor using Start and Stop push buttons. 📌 What will you learn? 🔹 Start and Stop push buttons (NO & NC). 🔹 Writing a simple Ladder Diagram. 🔹 Using PLC inputs and outputs (I0.0, I0.1, Q0.0). 🔹 Understanding the Self-Holding (Latch) circuit. 🔹 How to start the motor, keep it running, and stop it correctly. ━━━━━━━━━━━━━━━━━━ 💡 Lesson Challenge: Which element in the Ladder Diagram keeps the motor running after you release the Start button? 🤔 Write your answer in the comments! 👇 ━━━━━━━━━━━━━━━━━━ #PLC #PLCProgramming #LadderLogic #TIAportal #Siemens #IndustrialAutomation #MotorControl #AmrElKordy