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Modbus and OPC UA: Connecting OT to IoT
IoTMarketi Editorial
Industrial IoT guides
At a glance
PLCs still speak Modbus; OPC UA adds semantics and MQTT goes northbound. How gateways bridge OT to IoT.
Modbus
Register-based, simple, ubiquitous — RTU and TCP. Much of the legacy installed base still speaks Modbus.
OPC UA
Information models + secure sessions. Preferred when SCADA and digital twins need meaningful data.
Bridge pattern
PLC (Modbus) → Edge gateway → OPC UA or MQTT → Cloud / UNS
Pick edge hardware from the catalog and read the protocol guide.
Frequently Asked Questions
Modbus güvenli midir?
Klasik Modbus kimlik doğrulama içermez; izole VLAN, firewall ve mümkünse şifreli tünel ile korunmalıdır.
