OPC Classic vs Modbus TCP

Developers should learn OPC Classic when working on industrial automation, manufacturing execution systems (MES), or supervisory control and data acquisition (SCADA) projects that require integration of legacy equipment or systems relying on Windows-based communication meets developers should learn modbus tcp when working on industrial automation, iot, or scada systems that require reliable, real-time communication between devices over ethernet networks. Here's our take.

OPC Classic

Nice Pick

Developers should learn OPC Classic when working on industrial automation, manufacturing execution systems (MES), or supervisory control and data acquisition (SCADA) projects that require integration of legacy equipment or systems relying on Windows-based communication

Pros

• It is essential for scenarios involving real-time monitoring, data logging, and control of industrial processes where interoperability between diverse devices from multiple vendors is critical, though it is being gradually replaced by OPC UA in modern implementations
• Related to: opc-ua, industrial-automation

Cons

• Specific tradeoffs depend on your use case

Modbus TCP

Developers should learn Modbus TCP when working on industrial automation, IoT, or SCADA systems that require reliable, real-time communication between devices over Ethernet networks

Pros

• It is essential for projects involving PLC programming, data acquisition from industrial sensors, or integrating legacy equipment with modern IT infrastructure, as it offers a simple, open standard that reduces compatibility issues
• Related to: modbus-rtu, opc-ua

Cons

• Specific tradeoffs depend on your use case

The Verdict

These tools serve different purposes. OPC Classic is a platform while Modbus TCP is a protocol. We picked OPC Classic based on overall popularity, but your choice depends on what you're building.

The Bottom Line

OPC Classic wins

Based on overall popularity. OPC Classic is more widely used, but Modbus TCP excels in its own space.