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opc ua

2 articles tagged “opc ua”.

Flat vector diagram of OPC UA protocol architecture connecting a PLC to SCADA, historian and cloud clients through a central OPC UA server block
opc uaindustrial protocolsscada

OPC UA Protocol Explained for PLC Engineers

OPC UA is the industrial protocol linking PLCs to SCADA, historians and cloud systems. Learn how nodes, sessions, security and subscriptions actually work in plain terms.

Jul 22, 2026 · 10 min read

SCADA communication protocols Modbus DNP3 and OPC UA flat vector diagram showing RTU to SCADA server connections
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SCADA Communication Protocols: Modbus, DNP3 and OPC UA

Modbus, DNP3 and OPC UA each solve a different problem in SCADA. This guide breaks down how each works, where it fits, and what trips engineers up in the field.

Jul 6, 2026 · 9 min read

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