Aeroponic Irrigation System James, Chris, Ewan ENG305 Project 1 Aeroponic Irrigation System James, Chris, Ewan

Introduction Moeller PLC EASY719-DC-RC Programmable Control Device Ladder Logic Aeroponic Irrigation System Misting System suited to Australian conditions Pros Lower water consumption Doesn’t rely on soil quality Cons Complex Figure 1:.Moeller EASY719-DC-RC [1] Figure 2: Aeroponics System [2]

Objectives Broad Objectives Practical scenario Use as many features as possible Integrate Moeller Robust/Scalable Key Objectives Meaningful simulated results

Conception Key system operations identified: Root aeration Ventilation Temperature Control Nutrient Maintenance Sprinkler Head Monitoring

System Note: Temperature sensor Nutrient supply

System Operation

Simulation Item Simulation Sprinkler spray Light Analog sensors Potentiometer Vent control Pneumatic cylinder System Components Simulated using available equipment Time Scale Based on 24 hour cycle Simulation time much faster than real time Times chosen based on physical operations System Time Day/Night time tracked Simulation Time Real Time 1 hour 10 seconds 12 minutes 2 seconds 30 minutes 5 seconds 24 hours 4 minutes Operation Sim. Time Heating cycle 12 minutes Air pump cycle 30 minutes 5 seconds 24 hours 4 minutes

Wiring

Control Box Conception Simplify simulation set-up Self-contained controls and alerts Internal Configuration DIN Rail Relays Construction and Wiring Wired to be easily integrated with Moeller PLC Testing System tested prior, mostly errors in translation to control box

Programming Approach Variable mapping first “Modular” development Separation of processes Structured Flow Preventing double-triggering, event collision Memory bits as states, universal access Simultaneous operations Documentation Everything named Extensive comments

Results Testing Success in terms of objectives All Inputs and Outputs Used Moeller Integrated with numerous pieces of hardware Program Robust/Scalable Simulated adequately in terms of key objectives

Discussion Key Design Issues Wiring Programming Future Improvements Using PCB’s Software Improvement Stress Tests Conclusions about Application of Moeller In terms of Simulated outcomes, Moeller useful for application

References [1] Klockner Moeller, ‘EASY719-DC-RC’, 2013. [Online]. Available: http://www.klocknermoeller.com/easy700/easy719-dc-rc.htm. [Accessed: 06-Apr-2015]. [2] HowToGrowMarijuana.com, ‘Aeroponics – Grow Systems’, 2014. [Online]. Available: http://howtogrowmarijuana.com/aeroponics/. [Accessed: 06-Apr-2015].