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First Steps with Modbus

First Steps with Modbus

Modbus is the language most field devices already speak: energy meters, drives, sensors, SCADA systems and other PLCs. This course teaches how it works and how to implement it on Industrial Shields PLCs, as master or slave, over RS-485 (Modbus RTU) and Ethernet (Modbus TCP).

What you will be able to do

  • Explain coils, discrete inputs, input registers and holding registers, and choose the right function code.
  • Wire a Modbus RTU bus over RS-485 and a Modbus TCP network.
  • Implement a Modbus master and slave with the Arduino IDE (Arduino and ESP32 PLCs).
  • Implement them on Raspberry PLCs with Python, Node-RED and C.

Who it is for

System integrators and engineers who connect PLCs with field devices or SCADA systems. Basic programming knowledge is enough.

Choose the right PLC for your Modbus network at www.industrialshields.com.

Join this Course
Responsible Support Team
Last Update 04/10/24
Completion Time 3 hours 24 minutes
Members 191
Basic modbus
  • Introduction
    2Lessons · 39 min
    • Modbus fundamentals: data types, function codes, RTU and TCP
      10 xp
    • Modbus at a glance: summary and course map
  • Hardware Required
    1Lessons · 15 min
    • Hardware for Modbus RTU (RS-485) and Modbus TCP (Ethernet)
      10 xp
  • Software Implementations
    4Lessons · 2 hr 30 min
    • Modbus on Arduino and ESP32 PLCs with the Arduino IDE
      10 xp
    • Modbus on Raspberry PLCs with Python
      10 xp
    • Modbus on Raspberry PLCs with Node-RED
      10 xp
    • Modbus on Raspberry PLCs with C