Different Ways to Declare a Library in a Project
There are different ways to declare a library in a project. The libraries are automatically declared when adding the following:
oa controller:
oIEC 61131 basic libraries: Standard and Util libraries
oController PLCSystem library
oOther libraries to manage embedded controller features
ospecific controller features
oa fieldbus manager
oa fieldbus device
Some libraries must be added manually.
NOTE: Some functions and function blocks are not intended to be used within your program, but may be required by the system or by a device. You should use only functions and function blocks that are documented as program applicable, or functions or function blocks that you have thoroughly tested with your application.