Programming a PLC project

To create an application program that can run on the controller, fill POUs with declarations and implementation code (source code), link the I/Os of the controller to program variables, and configure a task assignment. After checking and debugging, the compiler creates the program code that can be loaded onto the controller.

Programming of the project blocks (POUs) is supported by the programming language editors and certain further functionalities such as pragmas and refactoring, and the application of ready-made function blocks from TwinCAT 3 PLC libraries.

Tools exist for syntax checking and code analysis, for creating data persistence and for encrypting the program code that is loaded onto the controller.

See also:

Your first TwinCAT 3 PLC project
Additional information
Assigning identifiers
Declaring variables
Creating user-specific data types
Creating programming objects
Creating source code in IEC
Creating a referenced task
Creating a class diagram
Calling a function block, function or method with external implementation
Using the input wizard
Using pragmas
Managing text in a text list
Using image pools
Checking the syntax and analyzing the code
Orientation and navigation
Find and Replace in the entire project
Data persistence
Using function blocks for implicit checks
Object-oriented programming