This case study showcases how the ARMxy embedded controller combined with modular I/O boards and OpenPLC is used to coordinate robot welding stations in a car body assembly line.
Case Details
Automotive welding production lines require highly reliable, precise, and coordinated control to maintain consistent welding quality and ensure smooth workflow. This case illustrates how ARMxy industrial controllers and OpenPLC work together to enhance automation performance across the welding line.
🔧 Application ScenarioIn a car manufacturing plant’s body-in-white (BIW) workshop, six welding robots must operate in tight synchronization. The system needs to coordinate signals from fixtures, adjust welding current dynamically, and manage post-weld cooling — all with high flexibility and easy configuration for different car models.
The client required:Precise welding sequence control
Remote debugging and PLC program updates
Flexible parameter adjustment for new vehicle models
Modular expansion to adapt to equipment changes
🛠 System Configuration✅ Main Controller: ARMxy Embedded Edge Gateway
Runs OpenPLC, Node-RED, Docker, with remote management capability
✅ X-DI Digital Input Module
Detects fixture clamping and safety signals
✅ X-DO Digital Output Module
Controls welding gun on/off and cooling water valves
✅ Y-AO Analog Output Module
Outputs 4–20mA signal to regulate welding current (0–500A)
💡 How It WorksUsing OpenPLC logic:
Fixture Detection (DI):
Once all clamps are in position, the welding sequence is triggered.
Dynamic Current Control (AO):
The AO module outputs a 4–20mA signal to adjust the welding power source based on plate thickness.
Post-weld Cooling (DO):
After welding, DO output activates the cooling valve to protect the equipment.
🌟 Key Benefits🔧 Remote Parameter Tuning via BLRAT
Easily modify welding current, timing, and logic remotely to adapt to new models or production changes.
🔌 Hot-swappable I/O Modules
X/Y I/O modules support plug-and-play replacement — ideal for rapid changeovers or hardware upgrades.
📦 Integrated Edge Control + Communication
ARMxy serves as a compact control center: PLC + Edge Gateway + Protocol Converter in one.
📊 Deployment Outcomes🔄 40% faster production switchover
💰 30% reduction in maintenance cost
🌐 100% remote configuration capability
🧩 Seamless adaptation to multi-model co-production
✅ ConclusionThis application highlights how the ARMxy Edge Controller, paired with OpenPLC and modular I/O boards, can provide a robust, adaptable control solution for industrial automation. It offers a practical approach for manufacturers looking to combine low-code control programming, remote management, and flexible system architecture — not just in automotive, but across smart energy, equipment manufacturing, and beyond.
📩 Contact us to learn more or get a tailored solution for your automation needs.
