Author: Liam (Site Owner)

The Startup OB runs once, the first time the PLC changes from STOP to RUN. Once … TIA Portal – Startup OBRead more

A FIFO, or First In, First Out, is a great way of managing an array of … TIA Portal – FIFO [First In, First Out]Read more

Predefined Variables are a great way to populate interface data with regularly used information The video … TIA Portal – Predefined VariablesRead more

There are some key differences between a Function Block and a Function The video below explains … TIA Portal – Function Block and Function DifferencesRead more

Instance data is stored in two formats A top level global block relating to data for … TIA Portal – Working With Instance DataRead more

Using snapshots is a great way to take a backup of the current values in a … TIA Portal – A Guide To Using SnapshotsRead more

Pointers are a handy method to manage vast data sets where symbolic data allocation isn’t possible. They’re composed of constructs that show where the data starts and its length. TIA Portal can automatically create a pointer when trying to access complex data like arrays. You should avoid using MOVE to access pointer data, instead, use BLKMOV. Keep in mind though, if the destination point for the BLKMOV is smaller than the pointer, data could get truncated.

Arrays are an important data type in PLC programming. It’s a method of grouping variables of … TIA Portal – Working With ArraysRead more