Network Protocols

EtherNet/IP, PROFINET, EtherCAT, Modbus, MQTT, IO-Link the languages PLCs use to talk to drives, HMIs, sensors, and the cloud. Know which protocol does what and you'll stop being confused every
time a new device shows up on a job.
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What You'll Learn

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Work with PROFINET

Assign device names via DCP, import GSD/GSDML files, and configure the hardware in TIA Portal. The Siemens ecosystem runs on this.

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Understand when EtherCAT is the answer

The fastest industrial Ethernet protocol. Know the daisy-chain architecture and why motion control applications often demand it.

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Implement Modbus TCP and RTU

The universal protocol that connects everything legacy VFDs, power meters, third-party devices. Read registers, write coils, decode the address mapping quirks that trip everyone up.

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Configure EtherNet/IP devices

The standard in Rockwell shops. Implicit vs. explicit messaging, RPI settings, and adding devices to the Studio 5000 I/O tree correctly.

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Use MQTT for IIoT connectivity

How PLC data gets to dashboards, historians, and cloud platforms. Understand publish/subscribe, brokers, and the Sparkplug B standard.

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Troubleshoot RS-485 and serial communication

Legacy devices never go away. Configure baud rate, parity, and termination. Know the wiring pitfalls before they waste your afternoon.

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Explain IO-Link and smart sensor advantages

More than on/off. Understand how IO-Link masters work, what IODD files do, and why auto-configuration saves serious maintenance time.

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Apply OPC-UA and HART concepts

OPC-UA is the platform-independent standard connecting PLCs to SCADA and cloud systems. HART is the process industry's wire-plus-digital combo. Both show up constantly in the field.

Who This Is For

Technicians

You're already working on machines but want to understand the hardware well enough to troubleshoot faster without calling an engineer every time.

Early-Career Engineers

You can write code but the panel hardware is still fuzzy. This fills in the physical layer — the stuff between the PLC and the motor.

Career Changers

Coming from electrical, mechanical, or IT? This module gives you the controls-specific hardware context that textbooks gloss over.

Course Lessons

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