Content
Preface
Introduction
Chapter 1 β’ Installing the Raspberry Pi 4
1.1 Hardware description
1.2 Installing the operating system
1.3 Installing the VNC Viewer
1.4 Installing the File Transfer Software WinSCP
1.5 Installing the openplcproject runtime
Chapter 2 β’ OpenPLC Editor Installation
2.1 Download and Installation
2.2 Raspberry Pi pin descriptions
2.3 Additional Hardware I/O Test Board
2.4 Additional 24 V PLC Board hardware
Chapter 3 β’ The OpenPLC Editor
3.1 Description of the OpenPLC Editor
3.2 Ladder Logic Example (LD)
3.3 Function Block example (FBD)
3.4 Instruction List example (IL)
3.5 Structured Text examples (ST, SCL)
3.5.1 Variable
3.5.2 Control structures
3.5.3 Conversion operators
3.5.4 Standard function blocks according to IEC 61131-3
3.5.5 First ST program example
3.5.6 ST example for controlling a conveyor belt
3.5.7 Defining arrays with the OpenPLC Editor
3.5.8 Defining structures with the OpenPLC Editor
3.5.9 Combining structures with arrays using the OpenPLC Editor
3.5.10 Definition of ENUMs
3.6 Sequential Function Chart example (SFC)
Chapter 4 β’ OpenPLC and the Modbus
4.1 Testing PLC programs with Modbus TCP
4.2 Visualization of PLC programs with AdvancedHMI
4.3 Visualization of PLC programs via the Internet
Chapter 5 β’ Modbus I/O modules
5.1 Modbus RTU module with the Arduino Uno
5.2 Modbus TCP module with the ESP8266 and WLAN
5.3 Web server application with the ESP8266 I/O module
Chapter 6.1 β’ Bibliography, circuit diagrams and layouts
6.2 Web links
6.3 Modbus commands for the ESP8266 I/O module
6.4 Circuit diagrams and layouts
6.4.1 Circuit diagram for the test board with buttons and LEDs:
6.4.2 Circuit diagram for the test board with 24V input outputs:
6.4.3 Circuit diagram for the ESP8266 board with 24V input outputs:
Index