Roadmap › 5. Automation & Industry 4.0 › Step 53
PLC
Industrial Automation — PLC, SCADA, Modbus and OPC UA
Automation pyramid and Purdue model, sensors and actuators, signals (digital, 4–20 mA), PLC hardware and scan cycle, IEC 61131-3 ladder logic and structured text, timers and counters, PID control, HMI/SCADA/DCS, historians, fieldbuses and industrial Ethernet, Modbus RTU/TCP, OPC UA, connecting plant data to .NET, safety and OT security (IEC 62443), with interview questions.
Interview priority:★ Must know High priority — asked in almost every interview, learn firstMedium asked regularlyLow good to know
Module 1: Field Devices and Signals
- 1.Sensors, actuators and signal typesBasic ★ Must know
- 2.PLC hardware and how a PLC differs from a PCBasic ★ Must know
Module 2: PLC Programming
- 3.IEC 61131-3 languages and ladder logic basicsIntermediate ★ Must know
- 4.Timers, counters and sequencesIntermediate ★ Must know
- 5.PID control loopsIntermediate Medium
Module 3: Supervisory Systems and Communication
- 6.HMI, SCADA, alarms and historiansIntermediate ★ Must know
- 7.Industrial networks and ModbusIntermediate ★ Must know
- 8.OPC UA — the standard for IT/OT data exchangeAdvanced ★ Must know
- 9.Connecting PLCs to .NET applicationsAdvanced ★ Must know
Module 4: Safety and Security
- 10.Functional safety and OT cybersecurityAdvanced Medium
Next course in the roadmap: 54. Industry 4.0 & IIoT — Smart Manufacturing Software →