Hi Francesco,

The main difference is the PlainVariable<T> is generic, i.e. Value is type according to T (for example Double) and therefore you can use it a bit safer in the application to ensure that your values are always defined as T. CacheVariable, on the other hand is type agnostic and you can use the same class for all of your variables.

CacheVariable is also used in the code generated classes. Nowadays, we recommend to use code generated variable types, such as AnalogUnitType, if possible. But in the end it’s up to you and what feels best for your applications.