CODESYS Persitence Manager

The Pesistence Manager from the CODESYS Application Composer can be used to store remanent variables. This is always mandatory if the CODESYS controller does not support the declaration via the keywords "RETAIN" and "PERSISTENCE".

General information about the Persistence Manager can be found in the CODESYS Help.

The following are the differences with the mechanism of declaration by keywords (PERSISTENT):

• The persistent data is stored in an external file.
• The persistent data can be exchanged between projects.
• Persistent variables can be deleted from the application or new ones can be added without losing the persistent values.
• Data created by the Persistence Manager can be modified with external editors. (for example with Notepad).