A Multi-Protocol (OPC-UA, MODBUS, MQTT) supported Web HMI development for the Control System of a Process Flow Tank using CDP Studio.
This project focuses on developing a dynamic, web-based Graphical User Interface (GUI) that enables seamless communication and control for industrial automation. The system leverages the CDP Studio platform to interface with a Process Tank Simulator, supporting real-time data exchange across three major industrial protocols:
- OPC-UA: Platform-independent, service-oriented architecture for robust data modeling.
- MQTT: Lightweight messaging protocol optimized for IoT and low-bandwidth environments.
- MODBUS: Industry-standard protocol for reliable device communication (TCP/IP variant).
- Dynamic Protocol Selection: Users can switch between OPC-UA, MQTT, and MODBUS at runtime.
- Real-Time Monitoring: Graphical representation of tank parameters (fluid level, pressure, flow rate).
- Process Tank Simulation: Mathematical modeling of fluid dynamics (inflow, outflow, hydrostatic pressure).
- Scalable Architecture: Support for multiple tank interfaces (up to 100) managed through CDP Studio.
The project utilizes a modular approach, separating the simulation logic, protocol handling, and HMI display.
| Protocol | Purpose |
|---|---|
| OPC-UA | Address Space Model with Node-based access. |
| MQTT | Pub/Sub model for efficient telemetry. |
| MODBUS | Register-based addressing (Holding Registers). |
The simulation is based on fundamental fluid dynamics:
- Inflow/Outflow: Managed via discharge coefficients and time-step integration.
-
Hydrostatic Pressure: Calculated based on fluid density and height (
$P = \rho \cdot g \cdot h$ ).
- Platform: CDP Studio IDE
- Language: C++ (Library Development), Python (Configurator API)
- HMI Technlogy: CDP Studio Web HMI (HTML5)
Developed as part of the IE505718 - Simulation and Visualization Specialization Project at NTNU.