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

2. 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]

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

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

5. System
Note:
Temperature sensor
Nutrient supply

6. System Operation

7. 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

8. Wiring

9. 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

10. 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

11. 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

12. 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

13. References
[1] Klockner Moeller, ‘EASY719-DC-RC’, [Online]. Available: [Accessed: 06-Apr-2015].
[2] HowToGrowMarijuana.com, ‘Aeroponics – Grow Systems’, [Online]. Available: [Accessed: 06-Apr-2015].