When you install the Unitronics programming software this includes a comprehensive set of example programs covering all aspects of Vision and U90 Ladder functions.
These example programs can be opened by selecting Help > Examples from the Visilogic or U90 Ladder software.
The examples split into two general areas, those which demonstrate how to use the PLC functions, such as maths or comparisons, and those which show how to configure applications, such as sending SMS messages or logging data to an SD card.
If the example program that you need is written for the wrong type of PLC then simply Project > Export the PLC subroutines and then Project > Import them into a project for the correct PLC type.
These small programs really work and can save huge amounts of development time as you learn from the experience of others.
And if need further assistance then you can always ask us!