Multicore Object: Task Configuration More and more of today's controllers have processors with multiple CPU cores. When CODESYS is used on such a controller with multiple CPU cores without using the C

Protecting an Application You achieve the know-how protection and copy protection of a boot application with the help of PLC -specific license management and its settings in the object properties of t

Data Persistence The lifespan of a variable and its data begins at the time when the variable is created and ends at the time when the variable is deleted and its memory is freed. The time when the va

Preserving Data with Persistent Variables Persistent variables retain their values after reloading the application, and after a download, warm start, or cold start. A special non-volatile memory area

Preserving Data with Retain Variables Retain variables preserve their values after a warm start. However, the degree of value retention for persistent variables is higher. A special non-volatile memor

Retaining Data with Variables of the Persistence Manager Persistent variables are managed in the Persistence Manager of the Application Composer. The functionality of the Persistence Manager does not

Preserving Data with Recipes Variables are managed persistently in the Recipe Manager. The Recipe Manager does not need any special memory on the controller in order to preserve values and data. Decla

Declaring VAR PERSISTENT Variables Below you will declare persistent variables in a persistent variable list and in a POU. Requirement: A project is opened and contains a program POU. You have selecte

Saving the Values of a Persistent Variable List to a Recipe Requirement: A project is opened and a persistent variable list with declarations of persistent variables exists under an application object

Using POUs for Implicit Checks CODESYS provides special POUs which implement implicit monitoring functions. At runtime, these functions check the limits of arrays or subrange types, the validity of po