Summary
This chapter has covered the topic of extension. This is when standard control objects' standard methods are extended outside of the standard control object, usually by using a child object that already exists.
This form of extension is a solution to adding methods to a project without changing the standardization of objects.
This chapter has also covered the extension of standard data. This allows asset-oriented data to consist of standard UDT data that is extended by bespoke data. This further supports the method extension by allowing non-standard setpoints and other data.
The next chapter moves away from PLC and over to the TIA Portal WinCC environment, in which HMIs and visualizations can be created to support projects.