Introduction to PLC programming with OpenPLC the first fully open source Programmable Logic
Controller on the Raspberry Pi and Modbus examples with Arduino Uno and ESP8266 PLC
programming is very common in industry and home automation. This book describes how the
Raspberry Pi 4 can be used as a Programmable Logic Controller. Before taking you into the
programming the author starts with the software installation on the Raspberry Pi and the PLC
editor on the PC followed by a description of the hardware. You'll then find interesting
examples in the different programming languages complying with the IEC 61131-3 standard. This
manual also explains in detail how to use the PLC editor and how to load and execute the
programs on the Raspberry Pi. All IEC languages are explained with examples starting with LD
(Ladder Diagram) over ST (Structured Control Language) to SFC (Special Function Chart). All
examples can be downloaded from the author's website. Networking gets thorough attention too.
The Arduino Uno and the ESP8266 are programmed as ModbusRTU or ModbusTCP modules to get access
to external peripherals reading sensors and switching electrical loads. I O circuits complying
with the 24 V industry standard may also be of interest for the reader. The book ends with an
overview of commands for ST and LD. After reading the book the reader will be able to create
his own controllers with the Raspberry Pi.
