About functions and functions blocks described in the IEC61131-3 programming Manual, please refer to the reference table reported right to the name (See screenshot). As you can see Sysfopen is a function available in the Embedded library, the Average is a function block available in the PLCUtyLib library and so on.If you need to use functions or function blocks that are not in the Embedded library there is two ways to do it, the first is to add the complete library to the project, use the menù Project -> Library Manager (See screenshot). In this way the complete library will be imported in your project and you can use all the objects on it.The second way is to import from the library only the object you need, use the menù Project -> Import object from library (See screenshot). In this way the selected objects will be imported in your project and you can use them.We suggest to use the second way, import only the objects you use and not all the library.
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