Scenario
Efficient ballast control is essential for maintaining ship stability during cargo operations and varying sea conditions. This case showcases how OpenPLC and ARMxy hardware are used in a ballast water treatment system aboard an ocean-going bulk carrier.
System Configuration
ARMxy Marine-Grade Controller – Core PLC controller for onboard automation
Y-AI Module – Monitors draft depth and tank levels
X-DO Module – Controls ballast pumps and valve actuators
Implementation
The AI module collects real-time signals from:
– Draft sensors (0–20mA input, representing 0–15m draft depth)
– Tank-level ultrasonic sensors (4–20mA input)
Based on the current load and voyage condition, the system calculates the optimal balancing scheme
OpenPLC logic dynamically adjusts pumps and valves to maintain ship stability
Operation reports are automatically transmitted via satellite communication to fleet management centers
Advantages
Enables remote fleet monitoring and diagnostics by the shipping company
Fully compliant with IMO Ballast Water Management System (BWMS) certification
Modular I/O design offers flexibility and fast integration with existing ship systems
This application demonstrates how OpenPLC + ARMxy delivers a cost-effective, flexible, and reliable solution for complex marine automation tasks.
