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2020

Tips and Tricks: How to configure an array monitoring range
TwinCAT and MQTT - Part 1 Getting started
TwinCAT and MQTT - Part 2 JSON messages
Tips and Tricks: Arrays are value types!
Communicating between Beckhoff controllers part 1: EAP
Tips and Tricks: Variable list declaration
Communicating between Beckhoff controllers part 2: ADS

2019

A Code Jam challenge with Structured Text
How to use monitoring attributes
The three pillars of OOP - Encapsulation
The three pillars of OOP – Inheritance
The three pillars of OOP – Polymorphism
Keep your online view clean: The hiding attributes
The ABSTRACT keyword
TwinCAT UML class diagram
Fluent interface in Structured Text
Getting started: Home Assistant and TwinCAT

Featured posts

Getting started: Home Assistant and TwinCAT
In this Getting started: Home Assistant and TwinCAT I'll show that basics of setting up communication between Home Assistant and TwinCAT.
Fluent interface in Structured Text
A popular programming design in high level languages as C# is the so-called 'fluent code' or 'fluent interface'. But what is a fluent interface and how can we implement this in Structured Text? In this post I briefly explain what a fluent interface is and give an example of a fluent interface in Structured Text.
The three pillars of OOP – Inheritance
With the object orientated options we've got available with IEC 61131-3 last years the time has come to talk about design patterns and best practices in the world of PLC programming. In this series of three posts 'The three pillars of OOP' I will explain the concepts of: Encapsulation, Inheritance and Polymorphism with some examples in TwinCAT. This post is about the second pillar 'Inheritance'.
TwinCAT and MQTT – Part 1 Getting started
MQTT is an extremely lightweight publish/subscribe messaging transport protocol. Because it is such a lightweight protocol MQTT is widely used in IOT devices. This series of posts show the basis of MQTT and TwinCAT together with some more advanced examples using JSON.
Communicating between Beckhoff controllers part 2: ADS
In part 2 of the series: "Communication between Beckhoff controllers" we discuss the protocol Automation Device Specification or ADS.

Keep your online view clean: The hiding attributes
In the post 'How to use monitoring attributes' I showed how to use the monitoring attributes: attribute 'monitoring' := 'variable' and attribute 'monitoring' := 'call'. With these pragma attributes we can monitor and modify our function blocks properties. This comes however with a small drawback. As the online view now shows your properties and their backing fields your online view gets less clear. In this post I will show how to solve this with the hiding attributes.

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Communicating between Beckhoff controllers part 2: ADS
Tips and Tricks: Variable list declaration
Communicating between Beckhoff controllers part 1: EAP
Tips and Tricks: Arrays are value types!
TwinCAT and MQTT – Part 2 JSON messages

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